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Versico Roofing Systems TPO Membrane Roofing
 
         
SECTION 07 54 23
 
         
TPO MEMBRANE ROOFING
 
         
 
         
Copyright 2007 - 2019 ARCAT, Inc. - All rights reserved

          ** NOTE TO SPECIFIER ** Versico Roofing Systems; Thermoplastic Polyolefin (TPO) Membrane Roofing.
This section is based on the products of Versico Roofing Systems, which is located at:
P.O. Box 1289
Carlisle, PA 17013
Toll Free Tel: (800) 992-7663
Fax: (717) 960-4036
Email: info@versico.com
Web: www.versico.com
Versico Roofing Systems is one of the largest providers of single-ply roofing systems in the world! With an eighteen-year track record of success, Versico has established their position in the industry, offering a single-source approach to their customers which results in more accuracy and convenience.
Versico offers single-ply systems to meet the needs of almost any type of building structure. These systems include VersiGard EPDM, VersiFlex PVC, and our state-of-the-art line of VersiWeld TPO heat-weldable roofing systems, as well as a full line of accessory products and warranties.
 
          PART 1GENERAL
 
          1.1SECTION INCLUDES
          ** NOTE TO SPECIFIER ** Delete items below not required for project.
 
          A.Thermoplastic Polyolefin Membrane (TPO) Roofing.
 
          B.Membrane Flashings.
 
          C.Metal Flashings.
 
          D.Roof Insulation.
 
          1.2RELATED SECTIONS
          ** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
 
          A.Section 03 30 00 - Cast-in-Place Concrete.
 
          B.Section 03 51 13 - Cementitious Wood Fiber Decks.
 
          C.Section 03 52 13 - Composite Concrete Roof Insulation.
 
          D.Section 05 36 00 - Composite Metal Decking.
 
          E.Section 06 10 00 - Rough Carpentry.
 
          F.Section 07 62 00 - Sheet Metal Flashing and Trim.
 
          G.Section 07 70 00 - Roof and Wall Specialties and Accessories.
 
          H.Section 08 60 00 - Roof Windows and Skylights.
 
          I.Section 22 30 00 - Plumbing Equipment.
 
          1.3REFERENCES
          ** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.
 
          A.American Society of Civil Engineers (ASCE) - ASCE 7 - Minimum Design Loads for Buildings and Other Structures, Current Revision.
 
          B.ASTM International (ASTM):
          1.ASTM C 208 - Standard Specification for Cellulosic Fiber Insulating Board.
          2.ASTM C 578 - Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation.
          3.ASTM C 1289 - Standard Specification for Faced Rigid Cellular Polyisocyanurate Thermal Insulation Board.
          4.ASTM D 41 - Standard Specification for Asphalt Primer Used in Roofing, Dampproofing, and Waterproofing.
          5.ASTM D 226 - Standard Specification for Asphalt-Saturated Organic Felt Used in Roofing and Waterproofing.
          6.ASTM D 312 - Standard Specification for Asphalt Used in Roofing.
          7.ASTM D 412 - Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers-Tension.
          8.ASTM D 1079 - Standard Terminology Relating to Roofing, Waterproofing, and Bituminous Materials.
          9.ASTM D 2178 - Standard Specification for Asphalt Glass Felt Used in Roofing and Waterproofing.
          10.ASTM D 4263 - Standard Test Method for Indicating Moisture in Concrete by the Plastic Sheet Method.
          11.ASTM D 4491 - Standard Test Methods for Water Permeability of Geotextiles by Permittivity.
          12.ASTM D 4869 - Standard Specification for Asphalt-Saturated Organic Felt Underlayment Used in Steep Slope Roofing.
          13.ASTM D 6878 - Standard Specification for Thermoplastic Polyolefin Based Sheet Roofing.
          14.ASTM E 96 - Standard Test Methods for Water Vapor Transmission of Materials.
 
          C.Factory Mutual (FM Global):
          1.Approval Guide.
          a.Factory Mutual Standard 4470 - Approval Standard for Class 1 Roof Covers.
          b.Loss Prevention Data Sheets 1-28, 1-29
 
          D.International Code Council (ICC).
          1.International Building Code (IBC).
 
          E.National Roofing Contractors Association (NRCA) - Low Slope Roofing and Waterproofing Manual, Current Edition.
 
          F.Sheet Metal and Air Conditioning Contractors National Association, Inc. (SMACNA) - Architectural Sheet Metal Manual.
 
          G.Underwriters Laboratories (UL):
          1.TGFU R1306 - "Roofing Systems and Materials Guide".
          2.UL-790 - Standard Test Method for Fire Tests of Roof Coverings.
          ** NOTE TO SPECIFIER ** Retain only design criteria required for the project and delete those not required or not applicable.
 
          1.4DESIGN CRITERIA
 
          A.Wind Uplift Performance:
          ** NOTE TO SPECIFIER ** Select required wind uplift performance criteria. Performance may be specified by referencing ASCE-7, by reference of an FM tested assembly, or both.
          1.Roof system is designed to withstand wind uplift forces as calculated using the current revision of ASCE-7.
          ** NOTE TO SPECIFIER ** Insert the appropriate FM rating as found in the current FM Guide.
          2.Roof system is designed to achieve a FM 1-___ wind uplift rating.
          ** NOTE TO SPECIFIER ** Insert the appropriate uplift test results.
          3.Roof system is designed to achieve ___ psf of uplift testing.
          4.Versico offers a standard 55 mph wind speed warranty. Please contact Versico if a higher wind speed warranty is desired.
 
          B.Fire Resistance Performance:
          ** NOTE TO SPECIFIER ** Select fire rating. Delete two of the next three paragraphs.
          1.Roof system will achieve a UL Class A rating when tested in accordance with UL-790.
          2.Roof system will achieve a UL Class B rating when tested in accordance with UL-790.
          3.Roof system will achieve a UL Class C rating when tested in accordance with UL-790.
          ** NOTE TO SPECIFIER ** Insert LTTR Value. Modify 'R value' to 'LTTR value' where Polyisocyanurate insulation is not used in the system.
 
          C.Thermal Performance: Roof system will achieve a minimum R value not less than ____.
 
          D.Drainage: Provide a roof system with positive drainage where all standing water dissipates within 48 hours after precipitation ends.
 
          E.Building Codes:
          1.Roof system will meet the requirements of all federal, state and local code bodies having jurisdiction.
          ** NOTE TO SPECIFIER ** Delete the next paragraph if LEED Credit is not required on this project.
 
          1.5LEED CERTIFICATION:
 
          A.Coordinate with Section 01 11 13 - Work Covered by Contract Documents.
 
          B.Submittals Required:
          1.SSc7.2 Heat Island Effect - Roof (LEED Form).
          2.MRc4 Recycled Content (LEED Form).
          3.MRc5 Local and Regional Materials (LEED Form).
          4.EQc4.1 Low-Emitting Materials - Adhesives and Sealants (LEED Form).
 
          1.6SUBMITTALS
 
          A.Submit under provisions of Section 01 30 00 - Administrative Requirements.
 
          B.Product Data: Manufacturer's data sheets on each product to be used, including:
          1.Preparation instructions and recommendations.
          2.Storage and handling requirements and recommendations.
          3.Installation methods.
 
          C.Detail Drawings:
          1.Submit approved plan, section, elevation or isometric drawings which detail the appropriate methods for all flashing conditions found on the project.
          2.Coordinate approved drawings with locations found on the Contract Drawings.
          ** NOTE TO SPECIFIER ** Delete selection samples if colors have already been selected.
 
          D.Selection Samples: For each finished product specified, two complete sets of chips representing manufacturer's full range of available colors, membranes, and thicknesses.
 
          E.Verification Samples: For each finish product specified, two samples, minimum size 4 inches (100 mm) square representing actual product, color, and patterns.
 
          1.7QUALITY ASSURANCE
 
          A.Manufacturer Qualifications: All primary products specified in this section will be supplied by a single manufacturer with a minimum of fifteen (15) years experience.
 
          B.Installer Qualifications:
          1.All products listed in this section are to be installed by a single installer with a minimum of five (5) years demonstrated experience in installing products of the same type and scope as specified.
          ** NOTE TO SPECIFIER ** retain one of the next two paragraphs only if manufacturer supplied guaranties are specified. Delete if not required.
          2.Installer shall be capable of extending the Manufacturer's Labor and Materials guarantee.
          3.Installer shall be capable of extending the Manufacturer's No Dollar Limit guarantee.
          ** NOTE TO SPECIFIER ** Include a mock-up if the project size and/or quality warrant taking such a precaution. The following is one example of how a mock-up on a large project might be specified. When deciding on the extent of the mock-up, consider all the major different types of work on the project.
 
          C.Mock-Up: Provide a mock-up for evaluation of surface preparation, installation techniques and workmanship.
          1.Finish areas designated by Architect.
          2.Do not proceed with remaining work until workmanship, color, and sheen are approved by Architect.
          3.Refinish mock-up area as required to produce acceptable work.
 
          1.8DELIVERY, STORAGE, AND HANDLING
 
          A.Store products in manufacturer's unopened packaging until ready for installation.
 
          B.Store and dispose of hazardous materials, and materials contaminated by hazardous materials, in accordance with requirements of local authorities having jurisdiction.
 
          1.9PROJECT CONDITIONS
 
          A.Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results. Do not install products under environmental conditions outside manufacturer's absolute limits.
 
          1.10WARRANTY
          ** NOTE TO SPECIFIER ** Select warranty type from the following six options.
 
          A.At project closeout, provide to Owner or Owners Representative an executed copy of the manufacturer's Total System warranty, outlining its terms, conditions, and exclusions from coverage.
          ** NOTE TO SPECIFIER ** Select Warranty Duration based on specified roof assembly.
** NOTE TO SPECIFIER ** 5 year warranty is available for:
 
          B.- Adhered 45, 60, and 80 mil TPO
 
          C.- Adhered 60 and 80 mil QA TPO
 
          D.- Mechanically Fastened 45, 60, and 80 mil TPO
 
          E.-Adhered 100, 115 and 135 mil TPO VersiFleece
 
          F.-Hot Mopped 120, 135 and 155 mil AC TPO VersiFleece
          1.Duration: Five (5) Years.
          ** NOTE TO SPECIFIER ** year warranty is available for:
          2.- Adhered 45, 60, and 80 mil TPO
          3.- Adhered 60 and 80 mil QA TPO
          4.- Mechanically Fastened 45, 60, and 80 mil TPO
          5.-Adhered 100, 115 and 135 mil TPO VersiFleece
          6.-Hot Mopped 120, 135 and 155 mil AC TPO VersiFleece
          7.Duration: Ten (10) Years.
          ** NOTE TO SPECIFIER ** 5 year warranty is available for:
          8.- Adhered 45, 60, and 80 mil TPO
          9.- Adhered 60 and 80 mil QA TPO
          10.- Mechanically Fastened 45, 60, and 80 mil TPO
          11.-Adhered 100, 115 and 135 mil TPO VersiFleece
          12.-Hot Mopped 120, 135 and 155 mil AC TPO VersiFleece
          13.Duration: Fifteen (15) Years.
          ** NOTE TO SPECIFIER ** 20-year warranty is only available for:
          14.- Adhered 60, and 80 mil TPO
          15.-Adhered 60 and 80 mil QA TPO
          16.- Mechanically Fastened 60- and 80 mil TPO
          17.-Adhered 115 and 135 mil TPO VersiFleece
          18.-Hot Mopped 135 and 155 mil AC TPO VersiFleece
          19.Duration: Twenty (20) Years.
          ** NOTE TO SPECIFIER ** 25-year warranty is only available for:
          20.- Adhered 80-mil TPO
          21.-Adhered 80-mil QA TPO
          22.- Mechanically Fastened 80-mil TPO
          23.-Adhered 135-mil TPO VersiFleece
          24.-Hot Mopped 155-mil AC TPO VersiFleece
          25.Duration: Twenty-Five (25) Years.
          ** NOTE TO SPECIFIER ** 30-year warranty is only available for:
          26.- Adhered 80-mil TPO
          27.-Adhered 80-mil QA TPO
          28.- Mechanically Fastened 80 mil TPO
          29.-Adhered 135-mil TPO VersiFleece
          30.-Hot Mopped 155-mil AC TPO VersiFleece
          31.Duration: Thirty (30) Years.
          ** NOTE TO SPECIFIER ** Delete if not required. Puncture coverage is only available for:
          32.- Adhered 80 mil TPO
          33.-Adhered 80 mil QA TPO
          34.- Mechanically Fastened 80 mil TPO
          35.-Adhered 115 and 135 mil TPO VersiFleece
          36.-Hot Mopped 135 and 155 mil AC TPO VersiFleece
          37.Puncture Coverage Rider: Coverage to be extended to include accidental punctures in accordance with terms stated in the Warranty document.
          ** NOTE TO SPECIFIER ** Select hail coverage where specified. Delete one of the next two paragraphs or all three if Hail coverage isnot required.
** NOTE TO SPECIFIER ** inch Hail coverage is only available for:
          a.- Adhered 60 and 0 mil TPO (Requires Dens-Deck, Securock, SecurShield HD, SecurShield HD Plus, SecurShield HD Composite or DuraFacer Composite)
          b.-Adhered and 135 mil TPO VersiFleece
          c.-Hot Mopped and 155 mil AC TPO VersiFleece
          38.Hail Coverage Rider: Coverage to be extended to include damage caused by a maximum 1 inch (25 mm) diameter hail in accordance with terms stated in the Warranty document.
          ** NOTE TO SPECIFIER **
** NOTE TO SPECIFIER ** inch Hail coverage is only available for:
          a.- Adhered 0 mil TPO (Requires Dens-Deck, Securock, SecurShield HD, SecurShield HD Plus, SecurShield HD Composite or DuraFacer Composite)
          b.-Adhered 115 and 135 mil TPO VersiFleece
          c.-Hot Mopped 135 and 155 mil AC TPO VersiFleece
          39.Hail Coverage Rider: Coverage to be extended to include damage caused by a maximum 2 inch (51 mm) diameter hail in accordance with terms stated in the Warranty document.
          40.Coverage to be extended to include roof edge metal water tightness in accordance with terms stated in the Warranty document.
 
          PART 2PRODUCTS
 
          2.1MANUFACTURERS
 
          A.Acceptable Manufacturer: Versico Roofing Systems, which is located at: P. O. Box 1289; Carlisle, PA 17013; Toll Free Tel: 800-992-7663; Fax: 717-960-4036; Email: request info; Web: http://www.versico.com
          ** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.
 
          B.Substitutions: Not permitted.
 
          C.Requests for substitutions will be considered in accordance with provisions of Section 01 60 00 - Product Requirements.
 
          2.2SCOPE / APPLICATION
 
          A.Roof System: Provide a waterproof roof system, capable of withstanding uplift forces as specified in this section.
          ** NOTE TO SPECIFIER ** Retain only attachment methods that apply to this project. Delete all others.
          1.Membrane Attachment: Mechanically Attached.
          2.Membrane Attachment: Fully Adhered.
          3.Membrane Attachment: Asphalt Adhered.
 
          B.Base Flashing: Provide a waterproof, fully adhered base flashing system at all penetrations, plane transitions and terminations.
          ** NOTE TO SPECIFIER ** Delete the next paragraph if insulation beneath the membrane is not specified.
 
          C.Insulation: Provide a roof insulation system beneath the finish membrane.
 
          D.Roof Garden Assembly:
          **NOTE TO SPECIFIER** Select roof Garden assembly type. Delete two of the next three paragraphs.
          1.Provide an Intensive planting system with a soil depth greater than 8 inches (204 mm) with a variety of plants such as sod grass, annual or perennial flowers, shrubs and small trees. Structure must be capable of withstanding the additional dead loads as calculated by the Project Engineer which typically exceed 48 lbs (22 kg) per square foot.
          2.Provide an Extensive planting system with a soil depth of 4 to 8 inches (102 to 204 mm) where recommended plants include sedums, herbs, grasses and other vegetation which can grow in this depth of media. Structure must be capable of withstanding the additional dead loads as calculated by the Project Engineer which are typically between 24 to 48 lbs (11 to 22 kg) per square foot.
          a.As an alternate to Ultra-Extensive or Extensive traditional, Versico Hydropack System may be used.
          3.Provide an Ultra-Extensive planting system with a soil depth less than 4 inches (102 mm) ideally suited for areas that will receive little maintenance. Recommended plants include sedums, herbs and grasses. Structure must be capable of withstanding the additional dead loads as calculated by the Project Engineer which are typically less than 24 lbs (11 kg) per square foot.
          ** NOTE TO SPECIFIER ** Select only base sheets required on the project and delete all others.
 
          2.3MEMBRANE BASE SHEET
 
          A.Versico FR Base Sheet 1S: A non-asphaltic, resin-bound, fiberglass-reinforced mat, coated on one side with a mineral-filled fire-resistant coating 48 inches (1219 mm) wide and 250 feet (76.2 m) long. Designed for use as a suitable substrate for direct application of Mechanically Attached Roofing Systems over decks requiring a fastened base sheet.
          ** NOTE TO SPECIFIER ** Delete the next paragraph if a Hot Mopped FleeceBACK Roofing System is not specified.
 
          B.Versico Modified Base Sheet: A tough, glass fiber, reinforced, SBS-modified asphalt, base sheet (nominal 39 inch (991 mm) wide by 50 feet (15240 mm) long) that meets or exceeds the requirements for ASTM D 6163 Type I, Grade S for SBS-modified bituminous sheet materials using glass fiber reinforcement. Designed for use with the Hot Mopped VersiFleece Roofing System.
 
          C.Versico SureMB 90 Modified Base Sheet: A smooth-surfaced, torch-grade SBS base ply, reinforced with a non-woven polyester mat that is saturated and coated with asphaltic bitumen and SBS elastomers.
 
          D.Versico SureMB 90TG Base Sheet: 94-mil smooth-surfaced, SBS, torch-applied membrane. Reinforced with a fiberglass mat that is saturated and coated with asphaltic bitumen and SBS elastomers which meets ASTM D6163 Type I, Grade S. SureMB 90TG is designed for use as a base-ply or inter-ply in Versico's multiple-ply system and can be used as an air barrier, vapor barrier or temporary (Up to 60 days) roof. Available in rolls 39-3/8 inches (1000 mm) wide and 49 feet 1 inch (14960 mm) long (164 square feet) and weighing 0.57 lbs per square foot.
 
          E.Versico SureMB 120TG Base Sheet: A smooth-surfaced, torch-grade SBS base ply, reinforced with a non-woven polyester mat that is saturated and coated with asphaltic bitumen and SBS elastomers.
 
          F.VapAir Seal 725TR Air/Vapor Barrier: A 40 mil composite consisting of 35 mils of self-adhering rubberized asphalt laminated to a 5-mil woven polypropylene film.
 
          G.VapAir Seal MD Air/Vapor Barrier: reinforced composite aluminum foil with self-adhesive SBS backing and removable poly release film. Used for direct application over metal decks.
          ** NOTE TO SPECIFIER ** Delete the next article if insulation is not required. Retain only insulation type(s) required and delete all others.
 
          2.4INSULATION
 
          A.Polyisocyanurate: Rigid board with glass fiber reinforced facers (GRF) on both sides, meeting or exceeding the requirements of ASTM C 1289, type II, Class 1. Versicore MPH.
          ** NOTE TO SPECIFIER ** Select compressive strength. Delete one of the next two paragraphs.
          1.Compressive Strength: Grade 2, 20 psi (138 kPa).
          2.Compressive Strength: Grade 3, 25 psi (173 kPa).
          3.Density: 2 lb per cubic foot (24 kg per cu m) minimum.
 
          B.SecurShield Polyiso: Rigid board with coated glass fiber mat facers (CGF) on both sides, meeting or exceeding the requirements of ASTM C 1289, Type II, Class 2.
          ** NOTE TO SPECIFIER ** Select compressive strength. Delete one of the next two paragraphs.
          1.Compressive Strength: Grade 2, 20 psi (138 kPa).
          2.Compressive Strength: Grade 3, 25 psi (173 kPa).
          3.Density: 2 lb per cubic foot (24 kg per cu m) minimum.
 
          C.Composite Board: Composite insulation panel comprised of 1/2 inch (13 mm) high-density Polyiso board laminated during the manufacturing process to SecurShield rigid Polyiso roof insulation meeting ASTM C1289 Versico SecurShield HD Composite.
          1.Top Layer of Lamination: ASTM C1289 Type II, Class 4, Grade 1. Compressive strength 80 psi min (551 kPa).
          2.Bottom Layer of Lamination: ASTM C1289 Type II, Class 2. Compressive strength 20 psi (138 kPa).
 
          D.Composite Board: Polyisocyanurate foam insulation with 1/2 inch (13 mm) wood fiber roof insulation laminated to one side and glass fiber reinforced (GRF) facers laminated to one side, meeting or exceeding the requirements of ASTM C 1289. Versico MPH-WF.
          1.Compressive Strength (Polyiso): 20 psi (138 kPa).
          2.Compressive Strength (Wood Fiber): 35 psi (241.5 kPa).
          3.Density (Polyiso): 2 lb per cubic foot (24 kg per cu m) minimum.
 
          E.Composite Board: Polyisocyanurate foam insulation with 7/16 inch (11 mm) Oriented Strand Board (OSB) laminated to one side and glass fiber reinforced (GRF) facers laminated to one side, meeting or exceeding the requirements of ASTM C 1289. Versico Durafacer composite.
          1.Oriented Strand Board: 7/16 inch (11 mm) thick.
          2.Compressive Strength (Polyiso): 20 psi (138 kPa).
          3.Density (Polyiso): 2 lb per cubic foot (24 kg per cu m) minimum.
 
          F.Expanded Polystyrene (EPS): Rigid, closed cell foam insulation meeting ASTM C 578. Insulfoam, distributed by Versico.
          ** NOTE TO SPECIFIER ** Select Compressive strength based on insulation type. Delete two of the next three paragraphs.
          1.Density: 1 lb min.
          2.Density: 1.25 lb min.
          3.Density: 1.5 lb min.
 
          G.Extruded Polystyrene (XPS): Rigid, closed-cell structured thermal barrier meeting ASTM C 578. Foamular, distributed by Versico.
          ** NOTE TO SPECIFIER ** Select insulation type. Delete three of the next four paragraphs.
          1.Foamular 250 Compressive Strength - 25 psi (1.75 kg/sq.cm.) minimum.
          2.Foamular 400: Compressive Strength - 40 psi (2.8 kg/sq.cm.) minimum.
          3.Foamular 600: Compressive Strength - 60 psi (4.2 kg per sq.cm.) minimum.
          4.Foamular1000: Compressive Strength - 100 psi (7.03 kg per sq.cm.) minimum.
 
          H.Extruded Polystyrene (XPS): Rigid, closed-cell recovery board meeting ASTM C 578. Foamular Durapink, distributed by Versico.
          ** NOTE TO SPECIFIER ** Select insulation type. Delete two of the next three paragraphs.
          1.1 inch (25 mm): Compressive Strength - 25 psi (1.75 kg per sq.cm.) minimum.
          2.3 per 4 inch (19 mm): Compressive Strength - 25 psi (1.75 kg per sq.cm.) minimum.
          3.1 per 2 inch (13 mm): Compressive Strength - 18 psi (1.27 kg per sq.cm.) minimum.
 
          I.Extruded Polystyrene (XPS): Rigid, closed-cell structured thermal barrier meeting ASTM C 578. Dow Styrofoam, distributed by Versico.
          ** NOTE TO SPECIFIER ** Select insulation type based on project requirements. Delete three of the next four paragraphs.
          1.Deckmate: Compressive Strength - 18 psi (1.27 kg per sq.cm.) minimum.
          2.Deckmate Plus: Compressive Strength - 25 psi (1.75 kg per sq.cm.) minimum.
          3.Roofmate: Compressive Strength - 40 psi (2.8 kg per sq. cm.) minimum.
          4.Plazamate: Compressive Strength - 60 psi (4.2 kg/sq. cm.) minimum.
 
          J.Water-resistant and silicone treated gypsum panel with embedded fiberglass facer on both sides, and pre-primed on one side. GP Gypsum Dens-Deck Prime, distributed by Versico.
          ** NOTE TO SPECIFIER ** Select thickness. Delete two of the next three paragraphs.
          1.Board Thickness: 1/4 inch (6 mm).
          2.Board Thickness: 3/8 inch (10 mm).
          3.Board Thickness: 1/2 inch (13 mm).
          4.Board Thickness: 5/8 inch (15 mm).
 
          K.Water-resistant and silicone treated gypsum panel with embedded fiberglass facer on both sides. GP Gypsum Dens-Deck, distributed by Versico.
          ** NOTE TO SPECIFIER ** Select thickness. Delete two of the next three paragraphs.
          1.Board Thickness: 1/4 inch (6 mm).
          2.Board Thickness: 3/8 inch (10 mm).
          3.Board Thickness: 1/2 inch (13 mm).
          4.Board Thickness: 5/8 inch (15 mm).
 
          L.Moisture-, mold- and impact-resistant, nonstructural fiber-reinforced gypsum panel made from 95 percent recycled materials. Securock, distributed by Versico.
          ** NOTE TO SPECIFIER ** Select thickness. Delete two of the next three paragraphs.
          1.Board Thickness: 1/4 inch (6 mm).
          2.Board Thickness: 3/8 inch (10 mm).
          3.Board Thickness: 1/2 inch (13 mm).
          4.Board Thickness: 5/8 inch (15 mm).
 
          M.SecurShield HD Polyiso Cover board: Rigid board with coated glass fiber (CGF) mat facers on both sides, meeting or exceeding the requirements of ASTM C 1289, Type II, Class 4, Grade 1.
          1.Compressive Strength: 80 psi min. (551 kPa).
          2.Board Thickness: 1/2 inch (13 mm).
 
          N.SecurShield HD Plus Polyiso Cover board: Rigid board with coated glass fiber (CGF) mat facers on both sides, meeting or exceeding the requirements of ASTM C 1289, Type II, Class 4, Grade 1. Designed for higher uplift with fewer fasteners per board.
          1.Compressive Strength: 80 psi min. (551 kPa).
          2.Board Thickness: 1/2 inch (13 mm).
 
          O.SecurShield HD FR Polyiso Cover board: Rigid board with coated glass fiber (CGF) mat facers on both sides, meeting or exceeding the requirements of ASTM C 1289, Type II, Class 4, Grade 1. Designed for UL 790 Class A combustible deck assemblies without a fire rated or thermal barrier product.
          1.Compressive Strength: 80 psi min. (551 kPa).
          2.Board Thickness: 1/2 inch (13 mm).
          ** NOTE TO SPECIFIER ** Delete the entire next article if insulation adhesive is not required.
 
          2.5INSULATION ADHESIVE
 
          A.DASH Adhesive: A spray or extruded applied, two-component polyurethane, low-rise expanding foam adhesive used for attaching approved insulations to compatible substrates (concrete, cellular lightweight insulating concrete, gypsum, cementitious wood fiber, wood or steel) or existing smooth or gravel surfaced BUR, modified bitumen or cap sheets.
 
          B.DASH Catalyst: Added to DASH Adhesive (Part B Side) to quicken adhesive reaction time.
 
          C.DASH DC (Dual Cartridge), Dual Tank or 5-gallon jug Adhesive: A two-component, polyurethane construction grade, low-rise expanding adhesive designed for bonding insulation to various substrates using a portable applicator.
 
          D.OlyBond 500 BA: A two-component, polyurethane, low-rise expanding adhesive used to bond insulation to various substrates using a mechanical dispenser system.
 
          E.OlyBond Spot Shot: A two-component, polyurethane construction grade, low-rise expanding adhesive designed for bonding insulation to various substrates using a portable applicator.
 
          F.One-Step Adhesive: A two-component, polyurethane construction grade, low-rise expanding adhesive designed for bonding insulation to various substrates using a portable applicator.
 
          2.6THERMOPLASTIC POLYOLEFIN (TPO) MEMBRANE
          ** NOTE TO SPECIFIER ** Select membrane type(s) required on the project from the next two options, and delete all others not required. Modify the included text as instructed.
 
          A.VersiWeld Membrane:
          ** NOTE TO SPECIFIER ** Select Membrane Color. Insert custom color where specified from manufacturers preselected 16 color listings. 100,000 sf minimum. Delete three of the next four paragraphs.
          1.Color: White.
          2.Color: Gray.
          3.Color: Tan.
          4.Special Color: ___________
          ** NOTE TO SPECIFIER ** Select membrane thickness. Delete one of the next two paragraphs.
          5.Membrane Thickness: 45 mil nominal.
          a.Thickness over Scrim: 0.015 inches (0.38mm).
          b.Breaking Strength (ASTM D 751): 225 lbf per in (1 kN per m) minimum.
          c.Tear Resistance (ASTM D 751): 55 lbf per in (245 N per m) minimum.
          d.Elongation (ASTM D 751): 25 percent.
          6.Membrane Thickness: 60 mil nominal.
          a.Thickness over Scrim: 0.0120 inches (0.508mm).
          b.Breaking Strength (ASTM D 751): 250 lbf per in (1.1 kN per m) minimum.
          c.Tear Resistance (ASTM D 751): 55 lbf per in (245 N per m) minimum.
          d.Elongation (ASTM D 751): 25 percent.
          7.Field Sheet Dimensions:
          ** NOTE TO SPECIFIER ** Select maximum field sheet width. Delete width options not required.
          a.Width: 4 feet (1.2 m) maximum.
          b.Width: 6 feet (1.8 m) maximum.
          c.Width: 8 feet (2.4 m) maximum.
          d.Width: 10 feet (3.05 m) maximum.
          e.Width: 12 feet (3.65 m) maximum.
          f.Length: 100 feet (30.5 m) maximum.
 
          B.VersiWeld PLUS Membrane:
          ** NOTE TO SPECIFIER ** Select Membrane color. Delete three of the next four paragraphs.
          1.Color: White.
          2.Color: Gray.
          3.Color: Tan.
          4.Special Color: _____________.
          5.Membrane Thickness: 80 mil nominal.
          a.Thickness over Scrim: 0.034 inches (0.76 mm).
          b.Breaking Strength (ASTM D 751): 350 lbf per in (1.6 kN per m) minimum.
          c.Tear Resistance (ASTM D 751): 55 lbf per in (245 N per m) minimum.
          d.Elongation (ASTM D 751): 25 percent.
          6.Field Sheet Dimensions:
          ** NOTE TO SPECIFIER ** Select maximum field sheet width. Delete width options not required.
          a.Width: 4 feet (1.2 m) maximum.
          b.Width: 6 feet (1.8 m) maximum.
          c.Width: 8 feet (2.4 m) maximum.
          d.Width: 10 feet (3.05 m) maximum.
          e.Width: 12 feet (3.65 m) maximum.
          f.Length: 100 feet (30.5 m) maximum.
 
          C.VersiWeld QA Membrane: TPO membrane laminated to an elastomeric pressure-sensitive adhesive.
          1.Color: White.
          ** NOTE TO SPECIFIER ** Select membrane thickness. Delete one of the next two paragraphs.
          2.Membrane Thickness: 60 mil nominal.
          a.Thickness over Scrim: 0.020 inches (0.508 mm).
          b.Breaking Strength (ASTM D 751): 250 lbf per in (1.1 kN per m) minimum.
          c.Tear Resistance (ASTM D 751): 55 lbf per in (245 N per m) minimum.
          d.Elongation (ASTM D 751): 25 percent.
          3.Membrane Thickness: 80 mil nominal.
          a.Thickness over Scrim: 0.034 inches (0.86 mm) plus or minus 10 percent.
          b.Breaking Strength (ASTM D 751): 350 lbf per in (1.6 kN per m) minimum.
          c.Tear Resistance (ASTM D 751): 55 lbf per in (245 N per m) minimum.
          d.Elongation (ASTM D 751): 25 percent.
          4.Field Sheet Dimensions:
          a.Width: 10 feet (3.05 m) maximum.
          b.Length: 100 feet (30.5 m) maximum.
 
          D.VersiWeld APEEL TPO Membrane: TPO membrane laminated to a protective film to protect the membrane during installation from scuffs and dirt accumulation
          1.Color: White.
          2.Color: Tan.
          3.Color: Gray.
          4.Membrane Thickness: 60 mil nominal.
          a.Thickness over Scrim: 0.020 inches (0.508 mm).
          b.Breaking Strength (ASTM D 751): 250 lbf per in (1.1 kN per m) minimum.
          c.Tear Resistance (ASTM D 751): 55 lbf per in (245 N per m) minimum.
          d.Elongation (ASTM D 751): 25 percent.
          5.Membrane Thickness: 80 mil nominal.
          a.Thickness over Scrim: 0.034 inches (0.86 mm) plus or minus 10 percent.
          b.Breaking Strength (ASTM D 751): 350 lbf per in (1.6 kN per m) minimum.
          c.Tear Resistance (ASTM D 751): 55 lbf per in (245 N per m) minimum.
          d.Elongation (ASTM D 751): 25 percent.
          6.Field Sheet Dimensions:
          a.Width: 4 feet (1.2 m) maximum.
          b.Width: 6 feet (1.8 m) maximum.
          c.Width: 8 feet (2.4 m) maximum.
          d.Width: 10 feet (3.05 m) maximum.
          e.Width: 12 feet (3.65 m) maximum.
          f.Length: 100 feet (30.5 m) maximum.
 
          E.VersiWeld VersiFleece Membrane: TPO membrane with a 55 mil fleece bonded to the underside.
          ** NOTE TO SPECIFIER ** Select Membrane Color. Insert custom color where specified from manufacturers preselected 16 color listings. 100,000 sf minimum. Delete three of the next four paragraphs.
          1.Color: White.
          2.Color: Gray.
          3.Color: Tan.
          4.Special Color: ______.
          ** NOTE TO SPECIFIER ** Select membrane thickness. Delete one of the next three paragraphs.
          5.Membrane Thickness: 100 mil nominal / 45 mil over fleece.
          6.Membrane Thickness: 115 mil nominal / 60 mil over fleece.
          7.Membrane Thickness: 135 mil nominal / 80 mil over fleece.
          8.Sheet Dimensions:
          a.Width: 12 feet (3.66 m) maximum.
          b.Length: 75 feet (22.86 m) maximum, for 135-mil membrane.
          c.Length: 100 feet (30.5 m) maximum.
          9.Performance:
          a.Breaking Strength: FB 100 - 300 lbf (1.3 kN) minimum / FB 115 - 400 (1.8 kN) minimum.
          b.Tear Strength: 55 lbf per in (245 N per m) minimum.
          c.Elongation: 25 percent.
 
          F.VersiWeld AC VersiFleece Membrane:
          1.Color: White.
          ** NOTE TO SPECIFIER ** Select membrane thickness. Delete one of the next two paragraphs.
          2.Membrane Thickness: 120 mil nominal / 45 mil over fleece.
          a.Breaking Strength (ASTM D 751): 225 lbf per in (1 kN per m) minimum.
          b.Tear Resistance (ASTM D 751): 55 lbf per in (245 N per m) minimum.
          c.Elongation (ASTM D 751): 25 percent.
          3.Membrane Thickness: 135 mil nominal / 60 mil over fleece.
          a.Breaking Strength (ASTM D 751): 225 lbf per in (1.1 kN per m) minimum.
          b.Tear Resistance (ASTM D 751): 55 lbf per in (245 N per m) minimum.
          c.Elongation (ASTM D 751): 25 percent.
          4.Field Sheet Dimensions:
          a.Width: 12 feet (3.65 m) maximum.
          b.Length: 75 feet (22.86 m) maximum.
 
          2.7FLASHING ACCESSORIES
          ** NOTE TO SPECIFIER ** Retain only flashing accessories required on the project and delete all others.
 
          A.Inside Corners: Pre-molded corner flashing for inside corners. 60 mil thickness. Color to match membrane.
 
          B.Outside Corners: Pre-molded corner flashing for outside corners. 60 mil thickness. Color to match membrane.
 
          C.TPO Curb Wrap Corners: Pre-fabricated corner flashings made from 45 mil thick reinforced VersiWeld membrane. 6 inch (152 mm) wide base flange and a 12 inch (305 mm) overall height. Sizes available to fit curbs up to 6 by 6 foot (1828 x 1828 mm) in size. Color to match membrane.
          ** NOTE TO SPECIFIER ** TPO T-Joint Covers are mandatory on all 60, and 80 mil TPO systems and on 45 mil systems where step-offs have not been properly sealed.
 
          D.TPO T-Joint Covers: 60 mil thick non-reinforced TPO flashing cut into a 4.5 inch (114 mm) diameter circle used to seal step-offs at splice intersections. Color to match membrane.
 
          E.TPO Universal Corners: a pre-molded flashing for use in a variety of corner details, including inside and outside corners. Available in white, gray and tan and are 60-mil thick.
 
          F.Pipe Flashings: A pre-molded flashing and clamping ring used for pipe penetrations. Available for 1 to 6 inch (25 to 152 mm) diameter pipes.
 
          G.Split Pipe Seals: Pre-fabricated flashing consisting of 45 mil thick reinforced VersiWeld Membrane for pipes 1 to 6 inch (25 to 152 mm) in diameter. Split (cut) and overlapped tabs are incorporated to allow the pipe seal to be opened and wrapped around the pipe when it is not possible to pull a standard pipe flashing over a round penetration.
 
          H.TPO Square Tubing Wraps: Fabricated flashings made of 45 mil thick reinforced VersiWeld membrane for square tubing. A split (cut) and overlap tab are incorporated into these parts to allow the seals to be opened and wrapped around a square penetration. Available for 3, 4, 5, and 6 inch (76, 102, 127, 152 mm) diameter square tubing.
 
          I.Molded TPO Sealant Pockets:
          1.Pre-fabricated, interlocking, 2-piece, injection molded, flexible pocket with a rigid polypropylene vertical wall and pre-formed deck flanges. Color - White
          2.Used with Thermoplastic One-Part Pourable Sealer as specified in this section for waterproofing pipe clusters or other odd shaped penetrations. Forms a 7 1/2 by 6 inch (191 x 152 mm) oval when completed. Color - White.
 
          J.Pre-Fabricated Sealant Pockets: A two-piece, pre-fabricated sealant pocket that utilizes reinforced TPO membrane and coated metal to form a rigid, oversized sealant pocket with a weldable horizontal deck flange. Color - White.
          1.12 inch (305 mm) - Total volume of 1.87 gallons.
          2.16 inch (406 mm) - Total volume of 2.77 gallons.
          3.20 inch (508 mm) - Total volume of 3.81 gallons.
 
          K.Sealant Pocket Extension Legs: Designed for use with the TPO Molded Sealant Pocket and the Pre-Fabricated Sealant Pocket to extend the length in increments of 10 inches (254 mm). Fabricated from 45 mil thick reinforced TPO membrane and TPO coated metal. Can be used full length, cut to size for customized lengths or welded to each other for extra long applications. Color - White.
 
          L.Pressure-Sensitive (PS) Cover Strip: A nominal 6 inch (152 mm) by 40 mil thick non-reinforced TPO membrane laminated to nominal 35 mil thick cured synthetic rubber pressure-sensitive adhesive used in conjunction with TPO Primer to strip in flat metal flanges (i.e., drip edges or rows of fasteners and plates). Color to match membrane.
 
          M.TPO Pressure-Sensitive (PS) RUSS: A nominal 6 inch (152 mm) and 10 inch (254 mm) wide, 45 mil thick reinforced TPO membrane with nominal 3 inch (76 mm) wide 35 mil thick cured synthetic rubber pressure-sensitive adhesive laminated along one end on 6 inch (152 mm) width and both ends on 10 inch (254 mm) width.
 
          N.TPO Non-Reinforced Flashing: Non-reinforced thermoplastic polyolefin based membrane used for field fabricated pipe flashings, sealant pockets and scuppers when the use of a pre-molded accessory is not feasible.
 
          O.Heat Weldable Walkway Rolls: Recycled VersiWeld Membrane offering superior tear, puncture and weather resistance and designed to protect VersiWeld membrane in those areas exposed to repetitive foot traffic or other hazards. Walkway material may be heat welded to VersiWeld membrane using an automated heat welder or hand held heat welder. Walkway Rolls are 34 inches (762 mm) wide by 50 feet (15.2 M) long and are nominal 120 mils thick. Color - White.
 
          P.VersiWeld TPO Rib Profile: Used to obtain the appearance of standing seam metal roofing with the performance of a TPO single-ply membrane. The TPO Rib Profile measures 1-1/4 inches (32 mm) tall and 2-1/8 inches (54 mm) wide, including the welding flanges, while the vertical profile is a substantial 3/8 inch (9.5 mm) thick. The profile has a continuous 1/8 inch (3.2 mm) diameter alignment hole, for use with fiberglass connecting pins, as well as a 1/8 inch (3.2 mm) fiberglass reinforcing cord for added strength. The TPO Rib Profile is available in white, gray and tan, 10 foot (3048 mm) lengths and packaged 20 per carton.
          ** NOTE TO SPECIFIER ** Retain only products required on this project and delete all others.
 
          2.8CLEANERS, PRIMERS, ADHESIVES AND SEALANTS
 
          A.VersiWeld Bonding Adhesive: Solvent-based contact adhesive that allows bonding of VersiWeld membrane to various porous and non-porous substrates.
          1.Base: Synthetic Rubber.
          2.Color: Yellow.
          3.Solids: 20.0 percent.
          4.VOC: 670 grams/liter.
 
          B.Low VOC Bonding Adhesive: High strength, solvent-based contact adhesive that allows bonding of VersiWeld membrane to various porous and non-porous substrates. It is specially formulated using a blend of VOC exempt and non-exempt solvents to be in compliance with the state of California Clean Air Act of 1988 (updated in 1997) and is further regulated by California's Air Quality Control Districts listing VOC grams per liter limitations.
          1.Base: Synthetic Rubber.
          2.Color: Yellow.
          3.Solids: 20.3 percent.
          4.VOC: 250 grams per liter.
 
          C.DASH Adhesive: A spray or extruded applied, two-component, polyurethane, low-rise expanding foam adhesive used to securely bond VersiFleece membranes to a variety of substrates.
 
          D.DASH Dual Cartridge Adhesive: A two-component, polyurethane construction grade, low-rise expanding adhesive used to securely bond VersiFleece membranes to a variety of substrates. The adhesive is extrusion applied 4 inch (102 mm), 6 inch (152 mm) or 12 inch (305 mm) on center (depending on project conditions) using a portable applicator.
 
          E.DASH Dual Tank Adhesive: A spray applied, two-component, polyurethane construction grade, low-rise expanding adhesive used to securely bond VersiFleece membranes to a variety of substrates.
 
          F.DASH 5-gallon Jug Adhesive: A two-component, polyurethane construction grade, low-rise expanding adhesive designed for bonding insulation to various substrates, packaged for use with the spray application rigs.
 
          G.Aqua Base 120: Semi-pressure-sensitive water-based bonding adhesive used as a two-sided contact adhesive.
 
          H.CAV-GRIP 3V Low-VOC Aerosol Contact Adhesive/Primer: a low-VOC, methylene chloride-free adhesive that can be used for a variety of applications including: Bonding VersiWeld membrane to various surfaces, priming unexposed asphalt prior to applying DASH Adhesive, adhering VersiWeld TPO membrane, horizontally, for the field of the roof, and for adhering VersiWeld VersiFleece and VersiWeld TPO membrane to vertical walls. Coverage rate is approximately 2,000 to 2,500 sq. ft. (186 to 232 square meters) per 40 lb (18 kg) cylinder and 4,000 to 5,000 sq. ft. (372 to 465 square meters) per 85 lb (39 kg) cylinder as a primer, in a single-sided application; 750 sq. ft. (70 square meters) per 40 lb (18 kg) cylinder and 1,500 sq. ft. (139 square meters) per 85 lb (39 kg) cylinder as an adhesive for vertical walls, in a double-sided application; 1,000 sq. ft. (93 square meters) per 40 lb (18 kg) cylinder and 2,000 sq. ft. (186 square meters) per 85 lb (39 kg) cylinder as an adhesive, horizontally, for the field of the roof, in a double-sided application.
 
          I.Low VOC Bonding Adhesive 1168: a solvent-based contact adhesive that allows bonding to EPDM to various porous and non-porous substrates. This product complies with the less than 250 g/L VOC content requirements for the OTC Model Rule for Single-Ply Roofing Adhesives. This product complies with the following California counties' VOC regulations: Alameda, Contra Costa, El Dorado, Los Angeles, Marin, Napa, Orange, Riverside, Sacramento, San Bernardino, San Diego, San Francisco, San Mateo, Santa Clara, Solano, Sonoma and Tehema
 
          J.Cut Edge Sealant: A medium solids contact, free flowing polymeric material designed for sealing cut edges (exposed fabric) of VersiWeld reinforced membrane.
 
          K.Water Cut-Off Mastic: A one-component, low viscosity, self wetting, Butyl blend mastic used as a compression sealing agent between membrane and applicable substrates.
 
          L.TPO Primer: Solvent-based product designed for priming TPO surfaces prior to the application of pressure-sensitive products.
 
          M.Low VOC TPO Primer: a solvent based primer designed for one-step cleaning and priming of EPDM surfaces prior to installation of quick-applied products. This product complies with the less than 250 g/L VOC content requirements for the OTC Model Rule for Single-Ply Roofing Adhesives.
 
          N.Universal Single-Ply Sealant: A 100 percent solids, solvent free, one-part polyether sealant that is used as a termination bar sealant. Available in white only.
 
          O.White One-Part Sealant: Single component, moisture curing, elastomeric polyether sealant that is compatible with Versico's Thermoplastic membranes. Provides a flexible, durable and long lasting seal around hard-to-flash penetrations in Thermoplastic Roofing Systems.
 
          P.Versico Weathered Membrane Cleaner: Clear, solvent-based cleaner used to loosen and remove contaminants from the surface of exposed membrane.
 
          Q.CCW 702 Primer and 702LV Primer (Low VOC) - A single component, solvent based, high-tack primer used to provide maximum adhesion between Versico 725TR Air and Vapor Barrier and an approved substrate. Applied by spray or long nap roller with a coverage rating ranging from approximately 300 to 350 square feet (28 to 33 square meters) per gallon (3.8 L) on smooth finishes (i.e., concrete) to 75 square feet (70 square meters) per gallon (3.8 L) on porous surfaces (i.e., Dens-Deck Prime gypsum board). Available in 5-gallon containers. CCW 702LV Primer contains less than 250 g/L VOCs and meets South Coast Air Quality Management District (SCAQMD) and Leadership in Energy and Environmental Design (LEED) Requirements for Volatile Organic Compounds.
 
          R.CCW 702 WB - a high-tack, water-based contact adhesive for promoting adhesion of Versico air/vapor barrier membranes and an approved substrate (i.e., concrete, Dens-Deck Prime and Securock). Applied by roller, brush or spray with an application rate of approximately 200 sq. ft. (18.6 square meters) per gallon (3.8 L). Available in 5-gallon containers. CCW 702 WB Primer contains 57g/L VOCs and meets South Coast Air Quality Management District (SCAQMD) and Leadership in Energy and Environmental Design (LEED) Requirements for Volatile Organic Compounds.
          ** NOTE TO SPECIFIER ** Retain the next article only if insulation is asphalt adhered.
 
          2.9BITUMEN
 
          A.Hot Asphalt: Meets or exceeds requirements of ASTM D 312:
          ** NOTE TO SPECIFIER ** Select required asphalt type. Delete two of the next three paragraphs.
          1.Type: Type III.
          2.Type: IV.
          3.Type: SEBS.
 
          B.Cut-Back Asphalt Primer: ASTM D 41 primer for structural concrete decks, existing smooth BUR, mineral surfaced cap sheet, or modified bitumen membranes prior to mopping.
 
          2.10FASTENERS
          ** NOTE TO SPECIFIER ** Retain only fasteners required on this project and delete all others.
 
          A.HPVX Fasteners: Heavy-duty No. 15 threaded fastener with a Phillips head used with HPVX seam plates (Mechanically Attached System) and where increased pullout resistance is necessary for steel and wood decks (Fully Adhered System)
 
          B.HPV-XL Fasteners: An oversized No. 21 steel threaded fastener used in conjunction with HPV-XL Plates for membrane securement on Mechanically Attached Roofing Systems.
 
          C.HP Fastener: Threaded, coated (E-Coat) fastener for use with steel, wood plank, minimum 15/32 inch thick plywood, or minimum 7/16 inch thick oriented strand board (OSB).
 
          D.Pre-Assembled ASAP Fasteners: A No. 3 Phillips head fastener and pre-assembled 3 inch (76mm) diameter Plastic Insulation Plate used for insulation attachment only into steel or wood decks.
 
          E.InsulTite Fasteners: Threaded, Phillips head fastener used with 3 inch (76 mm) diameter Insulation Plates. For insulation attachment only into steel or wood decks.
 
          F.CD-10 Concrete Fastener: A hammer-driven, non-threaded coated (E-Coat) fastener for use with structural concrete decks rated 3,000 psi or greater.
 
          G.MP 14-10 Concrete Fastener: A No. 14 threaded fastener used for minimum 3,000 psi concrete decks.
 
          H.Gyptec Fastener: A glass-filled nylon auger fastener designed for use with cementitious wood fiber and gypsum decks.
 
          I.Lite-Deck Fastener: An oversized diameter metal fastener and associated 3 inch diameter Lite-Deck metal plate for use on Adhered Roofing Systems to attach insulation to dense gypsum decks.
 
          J.Term Bar Nail-In: A 1-1/4 inch (32 mm) long expansion anchor with threaded drive pin used for fastening VersaGard Termination Bar or Seam Fastening Plates to concrete, brick or block walls.
 
          K.HPVX Plates: A 2-3/8 inch (60 mm) diameter metal barbed fastening plate used with Versico Fasteners for membrane securement. This plate can be used for insulation securement.
 
          L.HPV-XL Plates: A 2-3/8 inch (60 mm) diameter metal barbed fastening plate with an oversized hole for use with Versico HPV-XL Fasteners for membrane or insulation securement.
 
          M.Insulation Fastening Plates: a nominal 3 inch (76 mm) diameter plastic or metal plate used for insulation attachment.
 
          N.Base Sheet Fasteners And Plates:
          1.Dual-Prong Fastener - A factory pre-assembled, 1.8 inch (46 mm) long fastener consisting of a precision tube formed from galvanized (G-90) coated steel, a 2.7 inch (69 mm) diameter disk formed from Galvalume (AX-55) coated steel and a locking staple of high tensile steel wire used to secure base sheets to fibrous cement, lightweight concrete and gypsum providing 70 lbs. of pullout resistance is achieved (40 lbs. Min.).
          2.Metal Cap: For use on projects limited in height 30 feet (9.14 m) or 40 feet (12.2 m) depending on base sheet used, 1 inch (25 mm) Versico Metal Cap in conjunction with a ring shank nail may be use to attach base sheets to wood plank, plywood or OSB decks per Versico's approved fastening pattern.
          3.Base Sheet fasteners and plates by others shall be FM approved and the respective manufacturers' published recommendations for proper installation shall be followed.
 
          2.11EDGINGS AND TERMINATIONS
          ** NOTE TO SPECIFIER ** Retain only edgings and terminations required on the project and delete all others.
 
          A.VersiTrim 2000: Anchor bar roof edge fascia system consisting of 0.100 inch (2.5 mm) thick extruded aluminum bar, corrosion resistant stainless steel fasteners and snap-on fascia cover.
 
          B.VersiTrim 200: 24 gauge galvanized metal water dam. Finish as noted on the Finish Schedule of the Contract Drawings.
 
          C.VersiTrim Fascia: A metal anchor bar fascia system consisting of a formed quarter hard 0.050 inch (1.25 mm) aluminum retainer bar, corrosion resistant fasteners and a 0.040 inch (1 mm) aluminum or 24 gauge steel snap-on fascia cover.
 
          D.Versico Drip Edge: 22 gauge pre-punched 90-degree angle cleat and fascia sections. Kynar 500 or mill aluminum finish as noted on the Finish Schedule in the Contract Drawings.
 
          E.TPO Coated Metal: 24 gauge, galvanized steel sheet coated with a layer of non-reinforced VersiWeld laminate. Used to fabricate metal drip edges or other roof perimeter edging profiles. VersiWeld Membrane may be heat welded directly to the coated metal. Sheet sizes 4 feet by 10 feet (1219 x 3048 mm). Color to match membrane.
 
          F.VersiTrim Coping: Anchor cleat with pre-slotted holes, a concealed joint cover, and sections of coping cap. Kynar 500 or anodized aluminum finish as noted on the Finish Schedule in the Contract Drawings.
 
          G.Versico Termination Bar: 1 inch (13 mm) wide, 98 mil thick extruded aluminum bar pre-punched 6 inches (152 mm) on center with sealant ledge.
 
          2.12ROOF GARDEN COMPONENTS
          ** NOTE TO SPECIFIER ** Select required drainage board. Delete one of the next two paragraphs.
 
          A.Drainage Components:
          1.Versico's MiraDRAIN 9800 Drainage Board: High impact polystyrene core with "cups" and pierced holes allowing water retention and drainage. A non-woven polypropylene filter fabric is bonded to the retention side of the molded core to prevent passage of particles into the water reservoirs. Designed to retain water in Ultra-Extensive and Extensive Roof Gardens while allowing excess water to the drainage system. Installed over CCW 200V or 300HV protection fabric.
          a.Panel Thickness: 0.4 inches (1.02 mm).
          b.Water Flow Rate: 95 gpm per sqft in accordance with ASTM D 4491.
          2.MiraDRAIN G4 Roof Garden Drainage Composite: Filter fabric, moisture retention mat, drainage mat, and heavy duty protection fabric combined into a single, component specifically designed for vegetated roofs.
          a.Panel Thickness: 1.21 inches (30.1 mm)
          b.Water Flow Rate: 75 gpm per sf in accordance with ASTM D 4491.
 
          B.Protective Mats:
          ** NOTE TO SPECIFIER ** Retain only components required on this project and Delete all others.
          1.Protection Fabric: CCW 200V - 12 oz per sq yd needle punched, non-biodegradable, non-woven polypropylene fabric stabilized to resist soil chemicals, mildew and insects, for use in conjunction with Green Grid Trays only.
          2.Protection Fabric: 300HV - 16 oz per sq yd needle punched, non-biodegradable, non-woven polypropylene fabric stabilized to resist soil chemicals, mildew and insects.
          3.Root Barrier: 40 mil non-reinforced polypropylene geomembrane sheet specifically formulated for use in below grade applications to resist root growth and soil bacteria. Used in Intensive (deep) and Extensive (medium depth) Roof Garden Systems.
          4.Biobarrier: A water and air permeable non-woven root barrier designed to inhibit the growth of plants roots through low-level emission of synthesized plant hormones.
 
          C.Hardscape:
          ** NOTE TO SPECIFIER ** Retain only components required on this project and Delete all others.
          1.Individual Concrete Plaza Pavers: 24 by 24 by 2 inches thick (610 x 610 x 51 mm) precast concrete pavers weighing a minimum of 18 psf with a minimum compressive strength of 6500 psi.
          2.Paver Pedestals: Rubber paver pedestals to elevate the surface of the pavers above the roof membrane and promote positive drainage and protection from freeze/thaw.
          3.Stone Ballast: Nominal 1-1/2 inch (39 mm) diameter rounded water worn gravel which conforms with ASTM D 448, gradation size No. 4, applied at a minimum of 10 pounds per square foot.
          4.Other: All Roof Garden products not specified in this section such as concrete curbs, landscape lumber or other desired landscape products used to transition between Ultra-Extensive, Extensive and Intensive Roof Garden areas to act as a "growth media stop" must be approved specifically by the Architect prior to installation.
 
          D.Greenscape:
          1.Growing Medium: A mixture of mineral and organic soil components as selected by the landscape architect/designer or other appropriate landscape professional for the intended vegetation and climate.
 
          E.Vegetation:
          1.Sedum Tile: Fully pre-vegetated coconut fiber mat designed to provide immediate full vegetative coverage.
          2.Sedum Clippings and Gel: Un-rooted sedum cuttings dispersed on the surface of growth media in conjunction with a water retention gel to aid in the plant rooting process.
          3.Plugs: Plants are pre-grown into soil "plugs" to be inserted into the surface of the growth media. Typically delivered in 10 x 20 inch (254 x 508 mm) trays containing 24 - 72 individual plants.
 
          PART 3EXECUTION
 
          3.1EXAMINATION
 
          A.Do not begin installation until substrates have been properly prepared.
 
          B.If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.
 
          C.Clean surfaces thoroughly prior to installation.
 
          D.Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.
 
          E.Do not commence Work until all other work trades have completed jobs that require them to traverse the deck on foot or with equipment.
 
          F.A vapor retarder / temporary roof may be applied to protect the inside of the structure prior to the roof system installation.
          ** NOTE TO SPECIFIER ** Retain only deck types found on this project. Delete roof deck(s) not required.
 
          3.2SUBSTRATE PREPARATION
 
          A.Structural Concrete Deck:
          1.Minimum deck thickness for structural concrete is 4 inches (102 mm).
          2.Allow roof deck to cure prior to application of the roofing system. Where curing is in question, evaluate surface moisture and deck's dryness with the ASTM D-4263 or hot bitumen test procedures.
          3.Repair cracks greater than 1/8 inch (3 mm) in width in accordance with the deck manufacturer's recommendations.
          4.Sumps for the roof drains shall be provided in the casting of the deck.
          5.Where insulation is to be adhered with hot asphalt, prime the deck with asphalt/concrete primer, ASTM D 41 at the rate of one gallon per 100 square feet (0.4 l per sq m). Allow the primer to dry prior to the application of the roofing system.
 
          B.Steel Deck:
          1.Metal decks shall be a minimum uncoated thickness of 22 gauge and have a G-90 galvanized finish on all panels.
          2.Decks shall comply with the gauge and span requirements in the current Factory Mutual Approval Guide and be installed in accordance with Loss Prevention Data Sheet 1-28 or specific FM approval.
          3.Remove any surface corrosion and repair severely corroded areas. Properly fasten loose or inadequately secured decking.
 
          C.Wood Deck (Plank / Heavy Timber):
          1.Wood boards shall be at least 1 inch (25 mm) nominal thickness and have a nominal width of 4 feet 6 inches (1372 mm).
          2.All boards shall have a bearing on rafters at each end and be securely nailed.
          3.Cover knotholes or cracks in excess of 1/4 inch (6 mm) with securely nailed sheet metal.
 
          D.Wood Deck (Plywood Deck):
          1.Plywood sheathing shall be CDX grade, minimum 4 ply, and not less than 15/32 inch (12 mm) thick.
          2.Install deck over joists spaced 24 inches (610 mm) on center or less. Install deck with all sides bearing on and secured to joist and cross blocking.
 
          E.Cementitious Wood Fiber:
          1.Decks shall be protected from the weather during storage and application; any wet or deformed decking shall be removed and replaced.
          2.Anchor all panels against uplift and lateral movement.
          3.Install deck level. Any deflection, irregularities, or otherwise damaged panels shall be corrected or replaced.
 
          F.Lightweight Insulating Concrete Deck:
          1.Lightweight insulating concrete decks are required to have a minimum thickness of 2 inches (51 mm), a minimum compressive strength of 200 psi (1.38 MPa) and a minimum density of 22 lbs per cu ft (352 kg per sq m) for Fully Adhered Systems
          2.Moisture content of existing Lightweight concrete shall be under 20 percent when insulation is to be fastened directly to it.
          ** NOTE TO SPECIFIER ** Insert project specific information regarding insulation types and attachment. Add or remove layers as necessary, or delete the entire article if not required.
 
          3.3INSULATION - SYSTEM DESIGN
 
          A.Base Layer:
          1.Type: ________.
          2.Thickness in/mm): _____.
          3.Attachment Method: _____.
 
          B.Top Layer:
          1.Type: ________.
          2.Thickness in/mm): _____.
          3.Attachment Method: _____.
 
          C.Tapered System:
          1.Type: ________.
          2.Field Slope: ____ inch per foot (mm per m).
          3.Sump Slope: ____ inch per foot (mm per m).
          4.Cricket Slope: ____ inch per foot (mm per m).
          5.Attachment Method: _____.
 
          3.4INSULATION PLACEMENT
 
          A.Install insulation or membrane underlayment over the substrate with boards butted tightly together with no joints or gaps greater than 1/4 inch (6 mm). Stagger joints both horizontally and vertically if multiple layers are provided.
 
          B.Secure insulation to the substrate with the required mechanical fasteners or insulation adhesive in accordance with the manufacturer's current application guidelines.
 
          C.Do not install wet, damaged or warped insulation boards.
 
          D.Stagger joints in one direction unless joints are to be taped. Install insulation boards snug. Gaps between board joints shall not exceed 1/4 inch (6 mm). Fill all gaps in excess of 1/4 inch (6 mm) with same insulation material.
 
          E.Wood nailers shall be at least 3-1/2 inches (89 mm) wide or 1 inch (25 mm) wider than adjacent metal flange. Thickness shall equal that of insulation but not less than 1 inch (25 mm) thickness.
 
          F.Miter and fill the edges of the insulation boards at ridges, valleys and other changes in plane to prevent open joints or irregular surfaces. Avoid breaking or crushing of the insulation at the corners.
 
          G.Do not install any more insulation than will be completely waterproofed each day.
 
          3.5INSULATION ATTACHMENT
          ** NOTE TO SPECIFIER ** Delete the next paragraph if a Hot Mopped system is specified.
 
          A.Securely attach insulation to the roof deck. For Fully Adhered or Mechanically Attached Roofing Systems. Attachment shall have been successfully tested to meet or exceed the calculated uplift pressure required by the International Building Codes (ASCE-7) or ANSI/SPRI WD-1
          ** NOTE TO SPECIFIER ** Delete the next paragraph if an asphalt adhered or mechanically attached roof system is specified. FM Loss Prevention Data Sheet 1-29 no longer uses 50 and 75 percent increased fastener density in perimeter and corner areas for assemblies above FM 1-75.
 
          B.Enhance the perimeter and corner areas in accordance with the International Building Code (ASCE-7) or ANSI/SPRI WD-1.
          ** NOTE TO SPECIFIER ** Delete the next paragraph if asphalt applied insulation is not specified
 
          C.Install insulation layers, maximum 4 by 4 feet (1220 mm by 1220 mm) board size, in a full and uniform mopping of hot asphalt applied at the rate of 25 lb per square (1.2 kg per sq m). Stagger the joints of additional layers in relation to the insulation joints in the layers below by a minimum of 6 inches (152 mm).
          ** NOTE TO SPECIFIER ** Delete the next paragraph if adhesive applied insulation is not specified
 
          D.Install insulation layers applied with adhesive, coverage rate as necessary to achieve the specified attachment and uplift rating. Press each board firmly into place after adhesive develops strings when touched, typically 1 1/2 to 2 minutes after adhesive was applied, and roll with a weighted roller. Add temporary weight and use relief cuts to ensure boards are well adhered.
          ** NOTE TO SPECIFIER ** Retain the next article if ONLY if membrane is FULLY ADHERED
 
          3.6MEMBRANE PLACEMENT AND ATTACHMENT (Fully Adhered)
 
          A.Position VersiWeld membrane over the acceptable substrate. Fold membrane sheet back lengthwise so half the underside of the membrane is exposed.
 
          B.Apply TPO Bonding Adhesive in accordance with the manufacturer's published instructions, to the exposed underside of the membrane and the corresponding substrate area. Do not apply Bonding Adhesive along the splice edge of the membrane to be hot air welded over the adjoining sheet. Allow the adhesive to dry until it is tacky but will not string or stick to a dry finger touch.
          1.Roll the coated membrane into the coated substrate while avoiding wrinkles. Brush down the bonded section of the membrane sheet immediately after rolling the membrane into the adhesive with a soft bristle push broom to achieve maximum contact.
          2.Fold back the unbonded half of the sheet lengthwise and repeat the bonding procedures.
 
          C.Position adjoining sheets to allow a minimum overlap of 2 inches (51 mm).
 
          D.Hot-air weld the VersiWeld membrane sheets using the Automatic Hot Air Welding Machine or Hot Air Hand Welder in accordance with the manufacturer's hot air welding procedures.
 
          E.Continue to install adjoining membrane sheets in the same manner, overlapping edges a minimum of 2 inches (51 mm) and complete the bonding procedures as stated previously.
          ** NOTE TO SPECIFIER ** Retain the next article if ONLY if membrane is MECHANICALLY ATTACHED.
 
          3.7MEMBRANE PLACEMENT AND ATTACHMENT (Mechanically Attached)
 
          A.Unroll and position membrane without stretching. Allow the membrane to relax for approximately 1/2 hour prior to attachment. Provide and secure both perimeter and field membrane sheets in accordance with the manufacturer's most current specifications and details.
 
          B.Secure the membrane with the required Fasteners and Plates centered over the pre-printed marks approximately 1-1/2 inches (39 mm) from the edge of the membrane sheet.
 
          C.Install adjoining membrane sheets in the same manner in accordance with the manufacturer's current application requirements.
 
          D.Attachment Schedule:
          ** NOTE TO SPECIFIER ** Select field fastener density based on wind design criteria specified by the Architect or Engineer. Delete two of the next three paragraphs.
          1.Field (Zone 1) Fastener Density: 12 inches (305 mm) O.C.
          2.Field (Zone 1) Fastener Density: 9 inches (228 mm) O.C.
          3.Field (Zone 1) Fastener Density: 6 inches (152 mm) O.C.
          ** NOTE TO SPECIFIER ** Select perimeter fastener density based on wind design criteria specified by the Architect or Engineer. Delete two of the next three paragraphs.
          4.Perimeter (Zones 2 and 3) Fastener Density: 12 inches (305 mm) O.C.
          5.Perimeter (Zones 2 and 3) Fastener Density: 9 inches (228 mm) O.C.
          6.Perimeter (Zones 2 and 3) Fastener Density: 6 inches (152 mm) O.C.
          ** NOTE TO SPECIFIER ** Select the appropriate number of perimeter sheets specified by the Architect or Engineer. Insert the required number where not listed. Delete three of the next four paragraphs.
          7.Perimeter (Half-width) Sheets: 1.
          8.Perimeter (Half-width) Sheets: 2.
          9.Perimeter (Half-width) Sheets: 3.
          10.Perimeter (Half-width) Sheets: ___.
 
          3.8MEMBRANE PLACEMENT AND ATTACHMENT (VersiWeld QA TPO Fully Adhered)
 
          A.Position VersiWeld membrane over the acceptable substrate. Fold membrane sheet back lengthwise so half the underside of the membrane is exposed.
 
          B.Remove the release liner on one half of the sheet starting from the split in the liner at the middle of the sheet. The liner should be removed at an angle to reduce risk of splitting or tearing.
 
          C.Roll the membrane onto the substrate while avoiding wrinkles. To achieve the best adhesion, the membrane should be rolled onto the substrate at an angle with 150 lb weighted roller. When applying the Versico VersiWeld QA TPO membrane it is recommended to maintain a large curve on the leading edge of the membrane. This will help eliminate creases and bubbles that cannot be removed after the sheet is in place.
 
          D.Fold back the remaining half of the sheet and repeat the above process.
 
          E.Position adjoining sheets to allow a minimum overlap of 2 inches (51 mm).
 
          F.Hot-air weld the VersiWeld membrane sheets using the Automatic Hot Air Welding Machine or Hot Air Hand Welder in accordance with the manufacturer's hot air welding procedures. Versico recommends a test weld sample be made from a piece of scrap TPO to eliminate the need to remove a section from a completed seam. At all splice intersections, roll the seam with a silicone roller to ensure a continuous hot air welded seam.
 
          G.Continue to install adjoining membrane sheets in the same manner, overlapping edges a minimum of 2 inches (51 mm) and complete the bonding procedures as stated previously.
          ** NOTE TO SPECIFIER ** Retain the next article if ONLY if membrane is Versico VersiFleece FULLY ADHERED
 
          3.9MEMBRANE PLACEMENT AND ATTACHMENT (VersiFleece Fully Adhered)
 
          A.Position and unroll successive sheets and align to provide for a minimum 3 inch (76 mm) wide splice.
 
          B.Fold adjacent sheets in half lengthwise to expose an approximate 12 foot (3657 mm) wide substrate area.
 
          C.Membrane which will have the adjacent sheet spliced over it should be adhered to the substrate first. In this fashion, selvage edge splice area will not be contaminated by setting splice edge into the DASH Adhesive.
 
          D.Spray or extrude DASH Adhesive onto the substrate and allow to foam up approximately 1/8 inch (3 mm). Wait for the adhesive to achieve "string" when a small object is lifted out of the adhesive.
 
          E.Place the membrane into adhesive after adhesive develops strings when touched, typically 1-1/2 to 2 minutes after adhesive was applied and roll with a weighted roller. Add temporary weight and use relief cuts to ensure boards are well adhered.
 
          F.Apply DASH Adhesive to the substrate and continue process described above until all sheets are fully bonded, allowing for necessary splice overlaps at selvage edges. At end laps (along the width of the sheet) membrane shall be butted together which will be overlaid with 6 inch (152 mm) wide Sure-Weld Reinforced Membrane hot air welded along all edges. Pressure-Sensitive Cover strip is not permitted in this situation.
          ** NOTE TO SPECIFIER ** Retain the next article if ONLY if membrane is Sure-Weld AFX FleeceBACK Hot Mopped.
 
          3.10MEMBRANE PLACEMENT AND ATTACHMENT (Asphalt Adhered)
 
          A.General
          1.Store membrane in a dry area to prevent absorption of moisture in the fleece backing. If moisture is present, it must be removed with a wet-vac system and the membrane must be allowed to fully dry prior to membrane adhesion.
          2.The temperature of the asphalt during application must be within 25 degrees F (4 degrees C) of the EVT (Equiviscous Temperature). The manufacturer's heating instructions (i.e., maximum heating temperature, prolonged storage temperature guidelines) must be strictly followed.
          3.Apply asphalt at 18 to 22 pounds per square (100 square feet). It is important that "heavy spots" of asphalt, typically occurring at mopping overlaps or where the mop is first positioned, be avoided. At these areas, the asphalt must be spread evenly to avoid a heavy coverage rate that can cause asphalt saturation of the fleece backing. Asphalt saturation of the fleece must be avoided.
          4.If spreaders are used to apply asphalt, care must be taken to ensure the proper coverage rate is maintained. Do not overlap asphalt layers at multiple pass lines since the heavy coverage rate occurring at these overlapping areas must be avoided.
          5.Mopping the membrane directly to Polyisocyanurate insulation is not permitted. Versico Recovery Board must be used as an overlayment when insulation is specified. Versico Modified Base Sheet may be used in place of the Versico Recovery Board when fastened to a steel or wood deck following manufacturer's requirements for maximum 15-year warranty.
 
          B.When positioning membrane along the length for splices, allow the fleece backing to extend approximately 1/2 inch (13 mm) above adjoining membrane to avoid direct contact between TPO membrane and hot asphalt.
 
          C.When using a mop to apply asphalt, position the membrane over the substrate overlapping adjacent sheets to accommodate membrane splicing and fold in half lengthwise to expose the substrate and the back side of the membrane (full width of the membrane by approximately half the length).
 
          D.Beginning at the membrane fold, apply asphalt to the full width of the membrane extending a maximum of 4 to 5 feet (1219 to 1524 mm) while rolling the membrane into the asphalt immediately. The asphalt temperature at the time of membrane adhesion must be above 350 degrees F (176 degrees C). Continue to apply asphalt for the full width of the membrane extending 4 to 5 feet (1219 to 1524 mm) at a time while embedding the membrane into the asphalt until the entire half of the sheet is adhered. Fold back the unbonded half of the membrane and repeat the bonding procedures identified above.
 
          E.When using spreaders to apply asphalt, the membrane is folded widthwise dependent on the size of the spreader (36 to 57 inches (914 to 1448 mm) wide); i.e., if a 36 inch (914 mm) wide spreader is used, the membrane will be folded to expose approximately a 36 inch (914 mm) wide by 50 foot (15240 mm) long area. After the asphalt is applied in a single pass, the membrane is rolled into the asphalt. After mopping the membrane, apply asphalt to the remaining substrate area in single passes and continue to bond membrane as identified above.
          1.Membrane must be embedded into asphalt immediately after each spreader pass to ensure asphalt temperature is at least 350 degrees F (176.7 degrees C) at the time of membrane embedment.
          2.Take care that the asphalt is not dropped directly on the back of the membrane. Use a mop to spread asphalt at pass lines and under sheet folds to prevent a heavy coverage rate.
 
          F.After membrane mopping, immediately after adhesion, brush down the sheet with a soft bristled broom using light to medium pressure. Do not use weighted rollers or heavy pressure when brooming the membrane to avoid asphalt saturation of the fleece.
 
          3.11SEAM WELDING
          ** NOTE TO SPECIFIER ** Retain the following Paragraph only if VesiWeld APEEL TPO is specified. Delete if not required.
 
          A.APEEL Protective Film should be removed from within areas that are to be heat-welded together. In areas that do not require heat welding, the APEEL Protective Film can be left in place for up to 90 days.
 
          B.Hot-air weld membrane using an Automatic Hot Air Welding Machine or Hot Air Hand Welder in accordance with the manufacturer's current guidelines. At all splice intersections, roll the seam with a silicone roller to ensure a continuous hot air welded seam.
          ** NOTE TO SPECIFIER ** Retain the next paragraph if .060" thick membrane is specified.
 
          C.Overlay all splice intersections with T-Joint Covers.
 
          D.Probe all seams once the hot air welds have thoroughly cooled (approximately 30 minutes).
 
          E.Repair all seam deficiencies the same day they are discovered.
 
          F.Apply Cut Edge Sealant on all cut edges of reinforced membrane (where the scrim reinforcement is exposed) after seam probing is complete. Cut Edge Sealant is not required on vertical splices.
 
          3.12FLASHING
 
          A.Flashing of parapets, curbs, expansion joints and other parts of the roof shall be performed using VersiWeld reinforced membrane or prefabricated accessories. VersiWeld non-reinforced membrane may be used for flashing pipe penetrations, Sealant Pockets, and scuppers, as well as inside and outside corners, when the use of pre-molded or prefabricated accessories is not feasible.
 
          B.Follow manufacturer's typical flashing procedures for all wall, curb, and penetration flashing including metal edging/coping and roof drain applications.
          ** NOTE TO SPECIFIER ** Retain the following Paragraph only if VersiWeld APEEL TPO is specified. Delete if not required.
 
          C.APEEL Protective Film should be removed and discarded after the completion of the roof system installation.
          ** NOTE TO SPECIFIER ** Retain the following Paragraph only if VersiWeld Rib Profile is specified. Delete if not required.
 
          D.VersiWeld Rib Profiles:
          1.The TPO Rib Profile is recommended for use with VersiFleece TPO adhered roofing systems.
          2.The VersiWeld TPO Rib Profiles should be positioned parallel to the laps of the installed TPO roofing system and parallel with the roof slope where possible.
          3.Ensure that all welding surfaces are clean and dry. Inspect all seam areas for proper weld prior to installing VersiWeld TPO Rib Profile.
          4.TPO Rib Profile spacing can be individually determined to achieve the desired appearance.
          5.Connecting multiple ribs is achieved by using fiberglass pins. Insert a pin half-way into the end of one profile. Connect the adjoining rib by inserting the exposed end of the pin into the alignment hole. Repeat previous steps for additional TPO Rib profiles.
 
          3.13WALKWAYS
 
          A.Install walkways at all traffic concentration points (such as roof hatches, access doors, rooftop ladders, etc.) and all locations as identified on the Contract Drawings.
          ** NOTE TO SPECIFIER ** Select Walkway requirement. Delete one of the next two paragraphs.
 
          B.Hot-air weld walkway pads to the membrane in accordance with the manufacturer's current application guidelines.
 
          C.Loose lay concrete pavers over an approved protection sheet in accordance with the manufacturer's current application guidelines.
          ** NOTE TO SPECIFIER ** Delete the entire next article if Roof Gardens are not specified. Retain only the products required for the roof project specified in this section.
 
          3.14ROOF GARDEN COMPONENT APPLICATION
 
          A.General:
          1.Inspection:
          a.Membranes shall be adhered to minimum 1/2 inch (13 mm) DensDeck Prime, 1/2 inch (13 mm) SecurRock, or to structurally sloped concrete deck.
          b.A water test is required to ensure the waterproof integrity of the membrane system. Inspect for leaks and repair membrane if defects are found. Retest after repairs have been made.
          c.Sweep the surface of the membrane to remove all debris and loose or foreign material.
 
          B.Installation:
          1.Shallow Assembly - up to 4 inches (102 mm) in depth.
          a.Versico Roofing Membrane.
          b.CCW MiraDRAIN G4 Composite.
          c.Versico Engineered Growth Media.
          d.Vegetated Sedum Tiles, Sedum Plugs, or Sedum Cuttings with Versico Moisture Retention Gel.
          2.Medium Assembly - 4 to 8 inches (102 to 203 mm) in depth.
          a.Versico Roofing Membrane.
          b.CCW 300HV.
          c.40 mil non-reinforced Geomembrane or Biobarrier.
          d.CCW MiraDRAIN G4 Drainage Composite.
          e.Versico Engineered Growth Media.
          f.Vegetated Sedum Tiles, Sedum Plugs, or Sedum Cuttings with Versico Moisture Retention Gel.
          3.Deep Assembly - greater than 8 inches (203 mm) in depth.
          a.Versico Roofing Membrane.
          b.Insulfoam Foamular or DOW Polystyrene Insulation (25 to 60 psi).
          c.CCW 300HV.
          d.40 mil non-reinforced Geomembrane or Biobarrier.
          e.CCW MiraDrain G4 Drainage Composite.
          f.Versico Engineered Growth Media.
          g.Vegetated Sedum Tiles, Sedum Plugs, or Sedum Cuttings with Verisco Moisture Retention Gel.
 
          C.G4 Application: Unroll and install to provide a minimum 2 inch (51 mm) side overlap. Butt the end laps next to each other.
 
          D.Protection Fabric: Unroll directly over the membrane and provide a minimum 2 inch (51 mm) side and end overlap.
 
          E.Insulation: Loose apply insulation directly over the membrane with all joints tightly butted. Extend insulation up walls and curbs to the height of the growth media layer.
 
          F.Root Barrier:
          1.On Extensive garden systems, position root barrier loose-laid over the protection fabric. Overlap adjacent sheets a minimum of 2 inches (51 mm) and seam in accordance with manufacturer's current recommendations for the field conditions and membrane specified.
          2.On Intensive roof garden assemblies loose-laid root barrier over the extruded polystyrene insulation layer and seam in accordance with manufacturer's current recommendations for the field conditions and membrane specified.
          3.Extend root barrier up walls, curbs, etc. to the height of the top of the growth media layer.
 
          G.Growth Media/Planting
          1.Spread engineered soil mixes to the specified depth, plus 15 percent. Dispense to locations in a manner that will not overload the structure.
          2.Thoroughly soak soil with water using a sprinkler or hand sprayer.
          3.Plant vegetation in accordance with the landscape architect/designer plans and instructions for the intended soil and climate.
 
          3.15DAILY SEALS
 
          A.On phased roofing, when the completion of flashings and terminations is not achieved by the end of the work day, a daily seal shall be performed to temporarily close the membrane to prevent water infiltration.
 
          B.Complete an acceptable membrane seal in accordance with the manufacturer's requirements.
 
          3.16CLEAN UP
 
          A.Perform daily clean-up to collect all wrappings, empty containers, paper, and other debris from the project site. Upon completion, all debris shall be disposed of in a legally acceptable manner.
 
          B.Prior to the manufacturer's inspection for warranty, the applicator shall perform a pre-inspection to review all work and to verify all flashing has been completed as well as the application of all caulking.
 
          3.17PROTECTION
 
          A.Protect installed products until completion of project.
 
          B.Touch-up, repair or replace damaged products before Substantial Completion.
 
         
END OF SECTION