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SECTION 07540
PVC MEMBRANE ROOFING
 
 
Copyright 2008 - 2017 ARCAT, Inc. - All rights reserved
** NOTE TO SPECIFIER ** Versico Roofing Systems; Thermoplastic Polyvinyl Chloride (PVC) 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 1 GENERAL
 
1.1
SECTION INCLUDES
 
** NOTE TO SPECIFIER ** Delete items below not required for project.
 
A.
Thermoplastic Polyvinyl Chloride (PVC) Membrane Roofing.
B.
Membrane Flashings.
C.
Metal Flashings.
D.
Roof Insulation.
1.2
RELATED SECTIONS
 
** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
 
A.
Section 03300 - Cast-In-Place Concrete: Structural concrete roof decks.
B.
Section 03510 - Cementitious Roof Deck.
C.
Section 03520 - Lightweight Concrete Roof Insulation.
D.
Section 05310 - Steel Roof Deck.
E.
Section 06100 - Rough Carpentry: Roof blocking installation and requirements.
F.
Section 07620 - Sheet Metal Flashing and Trim: Metal flashing and counter flashing installation and requirements.
G.
Section 07700 - Roof Specialties and Accessories: Roof hatches, expansion joints, pavers and other related roof accessories.
H.
Section 08600 - Skylights: Roof Windows and metal framed skylights.
I.
Section 15430 - Plumbing Specialties: roof drains, scuppers, gutters and downspout installation and requirements.
1.3
REFERENCES
 
** 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 4434 - Standard Specification for Poly (Vinyl Chloride) Sheet Roofing.
12.
ASTM D 4491 - Standard Test Methods for Water Permeability of Geotextiles by Permittivity.
13.
ASTM D 4869 - Standard Specification for Asphalt-Saturated Organic Felt Underlayment Used in Steep Slope 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, 1nc. (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.
 
1.4
DESIGN 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.
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.
 
1.5
LEED CERTIFICATION:
A.
Coordinate with Section 01115 - Green Building Requirements, for LEED certification submittal forms and certification templates.
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)
1.6
SUBMITTALS
A.
Submit under provisions of Section 01300.
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 finish 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.
1.7
QUALITY 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.
1.8
DELIVERY, 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.
1.9
PROJECT 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.
1.10
WARRANTY
 
** NOTE TO SPECIFIER ** Select warranty type. Delete one of the next two paragraphs and modify the included text as required.
 
A.
At project closeout, provide to Owner or Owners Representative an executed copy of the manufacturer's Non-Total System warranty, outlining its terms, conditions, and exclusions from coverage.
 
** NOTE TO SPECIFIER ** 10-year warranty is available for:
- Adhered 50-, 60- and 80-mil PVC
- Mechanically Fastened 50-, 60- and 80-mil PVC
 
1.
Duration: 10 Years.
B.
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 ** 10-year warranty is available for:
- Adhered 50-, 60- and 80-mil PVC
- Mechanically Fastened 50-, 60- and 80-mil PVC
 
1.
Duration: 10 Years.
 
** NOTE TO SPECIFIER ** 15-year warranty is only available for:
- Adhered 50-, 60- and 80-mil PVC
- Mechanically Fastened 50-, 60- and 80-mil PVC
 
2.
Duration: 15 Years.
 
** NOTE TO SPECIFIER ** 20-year warranty is only available for:
- Adhered 80-mil PVC
- Mechanically Fastened 80-mil PVC
 
3.
Duration: 20 Years.
 
** NOTE TO SPECIFIER ** 25-year warranty is only available for:
- Adhered 80-mil PVC
- Mechanically Fastened 80-mil PVC
 
4.
Duration: 25 Years.
 
** NOTE TO SPECIFIER ** 30-year warranty is only available for:
- Adhered 80-mil PVC
- Mechanically Fastened 80-mil PVC
 
5.
Duration: 30 Years.
PART 2 PRODUCTS
 
2.1
MANUFACTURERS
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 (mindy.howard@versico.com); Web: 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 01600.
2.2
SCOPE / 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.
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.
2.3
MEMBRANE 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 (42" wide and 200' long). Designed for use as a suitable substrate for direct application of Mechanically Attached Roofing Systems over decks requiring a fastened base sheet.
B.
Versico Modified Base Sheet: A tough, glass fiber, reinforced, SBS-modified asphalt, base sheet (nominal 39 inch wide by 50' 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.
1.
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.
2.
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.
3.
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.
4.
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.
 
2.4
INSULATION
A.
Polyisocyanurate MP-H: Rigid board with fiber reinforced facers on both sides, meeting or exceeding the requirements of ASTM C 1289. Versicore MPH
1.
Compressive Strength: 20 psi (138 kPa).
2.
Density: 2 lb per cubic foot (24 kg/cu m) minimum.
B.
SecurShield Polyiso: Rigid board with coated glass fiber mat facers on both sides, meeting or exceeding the requirements of ASTM C 1289.
1.
Compressive Strength: 20 psi (138 kPa).
2.
Density: 2 lb per cubic foot (24 kg/cu m) minimum.
C.
Composite Board: Polyisocyanurate foam insulation with 1/2 inch (13 mm) wood fiber roof insulation laminated to one side and fiber reinforced 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/cu m) minimum.
D.
Composite Board: Polyisocyanurate foam insulation with 7/16 inch (11 mm) Oriented Strand Board (OSB) laminated to one side and fiber reinforced facers laminated to one side, meeting or exceeding the requirements of ASTM C 1289. Versico Durafacer.
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/cu m) minimum.
E.
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 three of the next four paragraphs.
 
1.
Compressive Strength: Type I - 10 psi (0.7 kg/sq.cm.) min.
2.
Compressive Strength: Type II - 15 psi (1.1 kg/sq.cm.) min.
3.
Compressive Strength: Type VIII - 30 psi (2.1 kg/sq.cm.) min.
4.
Compressive Strength: Type IX - 25 psi (1.75 kg/sq.cm.) min.
F.
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/sq.cm.) minimum.
2.
Deckmate Plus: Compressive Strength - 25 psi (1.75 kg/sq.cm.) minimum.
G.
Wood Fiber: Cellulose fiber board meeting the requirements of ASTM C 208.
 
** NOTE TO SPECIFIER ** Select thickness. Delete one of the next two paragraphs.
 
1.
Board Thickness: 1/2 inch (13 mm).
2.
Board Thickness: 1 inch (25 mm).
H.
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 (6mm).
2.
Board Thickness: 1/2 inch (13mm).
3.
Board Thickness: 5/8 inch (15mm).
I.
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 (6mm).
2.
Board Thickness: 1/2 inch (13mm).
3.
Board Thickness: 5/8 inch (15mm).
J.
Moisture-, mold- and impact-resistant, nonstructural fiber-reinforced gypsum panel made from 95% recycled materials. Securock, distributed by Versico.
 
** NOTE TO SPECIFIER ** Select thickness. Delete two of the next three paragraphs.
 
1.
Board Thickness: 1/4 inch (6mm).
2.
Board Thickness: 1/2 inch (13mm).
3.
Board Thickness: 5/8 inch (15mm).
2.5
INSULATION 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.
Versico DASH DC (Dual Cartridge) or Bag in a Box Adhesive: A two-component, polyurethane construction grade, low-rising 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-rising expanding adhesive designed for bonding insulation to various substrates using a portable applicator.
F.
One-Step: A two-component, polyurethane construction grade, low-rising expanding adhesive designed for bonding insulation to various substrates using a portable applicator.
2.6
POLYVINYL CHLORIDE (PVC) MEMBRANE
 
** NOTE TO SPECIFIER ** Select membrane type(s) required on the project from the next four options, and delete all others not required. Modify the included text as instructed.
 
A.
VersiFlex Membrane:
 
** NOTE TO SPECIFIER ** Select Membrane Color. Delete two of the next three paragraphs.
 
1.
Color: White.
2.
Color: Gray.
3.
Color: Tan
 
** NOTE TO SPECIFIER ** Select membrane thickness. Delete two of the next three paragraphs.
 
4.
Membrane Thickness: 50 mil nominal.
a.
Thickness over Scrim (ASTM D 4434): 0.0160 inches (0.406mm).
b.
Breaking Strength (ASTM D 751): 200 lbf/in (35 kN/m) minimum.
c.
Tearing Strength (ASTM D 751): 45 lbf/in (200 N/m) minimum.
d.
Elongation (ASTM D 751): 15 percent.
e.
Field Sheet Width: 10 feet (3 m) maximum.
f.
Length: 100 feet (30.5 m) maximum.
5.
Membrane Thickness: 60 mil nominal.
a.
Thickness over Scrim (ASTM D 4434): 0.016 inches (0.406mm).
b.
Breaking Strength (ASTM D 751): 200 lbf/in (35 kN/m) minimum.
c.
Tearing Strength (ASTM D 751): 45 lbf/in (200 N/m) minimum.
d.
Elongation (ASTM D 751): 15 percent.
e.
Field Sheet Width: 10 feet (3 m) maximum.
f.
Length: 100 feet (30.5 m) maximum.
6.
Membrane Thickness: 80 mil nominal.
a.
Thickness over Scrim (ASTM D 4434): 0.025 inches (0.635mm).
b.
Breaking Strength (ASTM D 751): 200 lbf/in (35 kN/m) minimum.
c.
Tearing Strength (ASTM D 751): 45 lbf/in (200 N/m) minimum.
d.
Elongation (ASTM D 751): 15 percent.
e.
Field Sheet Width: 10 feet (3 m) maximum.
f.
Length: 75 feet (22.8 m) maximum.
2.7
FLASHING ACCESSORlES
A.
VersiFlex PVC Inside Corners: Pre-molded corner flashing for inside corners. 80 mil thickness. Color - White.
B.
VersiFlex PVC Outside Corners: Pre-molded corner flashing for outside corners. 80 mil thickness. Color - White.
 
** NOTE TO SPECIFIER ** PVC T-Joint Covers are required on all 60, and 80 mil PVC systems.
 
C.
VersiFlex PVC T-Joint Covers: 40 mil thick non-reinforced PVC flashing cut into a 4.5 inch (114mm) diameter circle used to seal step-offs at splice intersections.
 
** NOTE TO SPECIFIER ** Select Color. Delete one of the next two paragraphs.
 
1.
Color: White.
2.
Color: Gray.
D.
VersiFlex PVC Pipe Flashings: A pre-molded flashing and clamping ring used for pipe penetrations. Available for 1 inch to 6 inch (25 - 152mm) diameter pipes.
E.
VersiFlex PVC Split Pipe Seals: Pre-fabricated flashing consisting of 60 mil thick reinforced VersiFlex Membrane for pipes 1 inch to 6 inch (25 - 152mm) in diameter. A split (cut) and overlap tab 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.
F.
VersiFlex PVC Square Tubing Wraps: Fabricated flashings made of 60 mil thick reinforced VersiFlex 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 inch, 4 inch and 6 inch (76, 102, 152 mm) diameter square tubing.
G.
VersiFlex PVC Molded Sealant Pockets:
1.
Pre-fabricated, interlocking, 2-piece, injection molded, flexible pocket with a rigid polypropylene vertical wall and pre-formed deck flanges.
2.
Used in conjunction 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 inch by 6 inch (191 x 152mm) oval when completed. Available in white only.
H.
VersiFlex PVC Non-Reinforced Flashing: 80 mil thick rolls 12 inches and 24 inches wide. Used for inside/outside corners and field fabricated pipe flashings when use of pre-molded accessories is not feasible.
I.
VersiFlex PVC Heat Weldable Walkway Rolls: VersiFlex Membrane offering superior tear, puncture and weather resistance and designed to protect VersiFlex membrane in those areas exposed to repetitive foot traffic or other hazards. Walkway material may be heat welded to VersiFlex membrane using an automated heat welder or hand held heat welder. Walkway Rolls are 36 inches (914mm) wide by 60 feet (18.3 M) long and are nominal 80 mils thick. Color - Gray.
 
** NOTE TO SPECIFIER ** Retain only products required on this project and delete all others.
 
2.8
CLEANERS, PRIMERS, ADHESIVES AND SEALANTS
A.
VersiFlex PVC Adhesive: Solvent-based contact adhesive that allows bonding of VersiFlex membrane to various porous and non-porous substrates.
1.
Base: Synthetic Rubber.
2.
Color: Pale Yellow.
3.
Solids: 24.2 percent.
4.
VOC: 600 to 700 grams/liter.
B.
Aqua Base 120 Bonding Adhesive: Semi-pressure-sensitive water-based adhesive used as a two-sided contact adhesive.
C.
PVC Low VOC Bonding Adhesive: Solvent-based contact adhesive to various porous and non-porous substrates. This product meets the requirements of the less than 250 gpl VOC content requirements for the OTC Model Rule for Single-Ply Roofing Adhesives.
D.
HydroBond PVC Water-Based Adhesive: Water-Based wet lay-in, one-sided adhesive used to adhere PVC Membranes to a clean and dry horizontal surface up to a 2:12 slope. Can also be used as a contact adhesive in vertical applications.
E.
VersiFlex PVC Cut Edge Sealant: Free flowing, clear sealant designed for sealing cut edges of VersiFlex reinforced membrane.
F.
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.
G.
Universal Single-Ply Sealant: A 100% solids, solvent free, one-part polyether sealant that is used as a termination bar sealant. Available in white only.
H.
White One-Part Pourable 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.
I.
PVC Membrane Cleaner: Clear, solvent-based cleaner used to loosen and remove contaminants from the surface of exposed membrane.
 
** NOTE TO SPECIFIER ** Retain the next article only if insulation is asphalt adhered.
 
2.9
BITUMEN
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.
2.10
FASTENERS
 
** NOTE TO SPECIFIER ** Retain only fasteners required on this project and delete all others.
 
A.
HPVX Fastener: A heavy duty #15 threaded fastener with a #3 Phillips drive used with Versico's HPVX Fastening Plate to secure Mechanically Attached Roofing Systems. It is used on minimum 22 gauge steel decks or minimum 15/32" CDX plywood decks. It is also designed to offer an optimum combination of driving performance, back-out and corrosion resistance with excellent pullout performance.
B.
HPV-XL Fastener: An oversized diameter (.315 inch) steel, threaded fastener used in conjunction with HPV-XL Plates for membrane securement into minimum 22 gauge steel or wood decks on Mechanically Attached Roofing Systems.
C.
HPV Fastener: A threaded E-coat square head fastener for insulation attachment only. Used into steel, wood plank, minimum 15/32 inch thick plywood or minimum 7/16" thick oriented strand board (OSB).
D.
InsulTite ASAP Fastener: Versico's InsulTite Fastener pre-assembled with a 3" diameter plastic plate used for insulation attachment only on Fully Adhered and Mechanically Attached Roofing Systems.
E.
InsulTite Fasteners: A threaded Phillips drive fastener used with Versico Insulation Plates for insulation attachment to steel or wood decks.
F.
CD-10 Fastener: A hammer-driven, non-threaded E-Coat fastener for use with structural concrete decks rated 3,000 psi or greater.
G.
MP 14-10 Concrete Fastener: A #14 threaded fastener with a #3 Phillips drive 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: A oversized diameter fastener and associated 3" Lite-Deck Metal Plate for use on Adhered Roofing Systems to attach insulation to gypsum decks.
J.
HPVX: A 2-3/8 inch diameter metal barbed fastening plate used with Versico HPVX, CD-10 or MP 14-10 Fasteners for membrane or insulation securement. This plate can be used for membrane or insulation securement on Mechanically Attached Roofing Systems.
K.
HPV-XL Plate: A 2-3/8 inch diameter metal barbed fastening plate with an oversized hole for use with Carlisle HPV-XL Fasteners for membrane securement on Mechanically Attached Roofing Systems.
L.
Seam Fastening Plate: A 2 inch diameter metal plate used for insulation attachment on Mechanically Fastened Systems or membrane securement at angle changes on Fully Adhered Systems in conjunction with the appropriate Versico Fastener.
M.
Insulation Fastening Plate: A nominal 3 inch metal plate used for insulation attachment in conjunction with the appropriate Versico Fastener.
2.11
EDGINGS AND TERMINATIONS
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.
VersiTrim Drip Edge: 22 gauge pre-punched 90-degree angle cleat and 12 foot long fascia sections. Kynar 500 or aluminum finish as noted on the Finish Schedule of the Contract Drawings.
E.
VersiFlex PVC Coated Metal: 24 gauge, galvanized steel sheet coated with a layer of non-reinforced VersiFlex flashing. Used to fabricate metal drip edges or other roof perimeter edging profiles. VersiFlex Membrane may be heat welded directly to the coated metal. Sheet sizes 4 feet by 10 feet (1219 x 3048mm). 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 of 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.
PART 3 EXECUTION
 
3.1
EXAMINATION
A.
If substrate preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.
3.2
PREPARATION
A.
Clean surfaces thoroughly prior to installation.
B.
Prepare surfaces using the methods recommended by the manufacturer for achieving the best result for the substrate under the project conditions.
C.
Do not commence Work until all other work trades have completed jobs that require them to traverse the deck on foot or with equipment.
D.
A vapor retarder / temporary roof (Versico 725 TR Air and Vapor Barrier/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.
 
3.3
SUBSTRATE PREPARATION
A.
Structural Concrete Deck:
1.
Minimum deck thickness for structural concrete is 4 inches (102 mm).
2.
Allow roof deck to cured 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/sm). 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) o.c. 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 pcf (352 kg/sm) for Adhered Roofing 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.
 
3.4
INSULATION - SYSTEM DESIGN
A.
Base Layer:
1.
Type: ____________.
2.
Thickness: ______ inches (___ mm).
3.
Attachment Method: _____.
B.
Top Layer:
1.
Type: ____________.
2.
Thickness: ______ inches (___ mm).
3.
Attachment Method: _____.
C.
Tapered System:
1.
Type: ____________.
2.
Field Slope: ____ inch per foot.
3.
Sump Slope: ____ inch per foot.
4.
Cricket Slope: ____ inch per foot.
5.
Attachment Method: _____.
3.5
INSULATION 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.
3.6
INSULATION ATTACHMENT
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 Code (ASCE-7) or ANSI/SPRI WD-1.
 
** NOTE TO SPECIFIER ** Delete the next paragraph if a Mechanically Attached 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 feet 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/square (1.2 kg/sm). Stagger the joints of additional layers in relation to the insulation joints in the layer(s) 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. Stagger the joints of additional layers by a minimum of 6 inches (152 mm).
 
** NOTE TO SPECIFIER ** Retain the next article ONLY if membrane is FULLY ADHERED
 
3.7
MEMBRANE PLACEMENT AND ATTACHMENT (Fully Adhered)
A.
Position VersiFlex membrane over the acceptable substrate. Fold membrane sheet back lengthwise so half the underside of the membrane is exposed.
B.
Apply VersiFlex 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 (51mm).
D.
Hot-air weld the VersiFlex 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 (51mm) and complete the bonding procedures as stated previously.
 
** NOTE TO SPECIFIER ** Retain the next article ONLY if membrane is MECHANICALLY ATTACHED.
 
3.8
MEMBRANE PLACEMENT AND ATTACHMENT (Mechanically Attached)
A.
Unroll and position membrane without stretching. 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 (39mm) 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 one of the next two paragraphs.
 
1.
Field (Zone 1) Fastener Density: 12 inches (305mm) O.C.
2.
Field (Zone 1) Fastener Density: 18 inches (457mm) O.C.
3.
Perimeter (Zones 2 and 3) Fastener Density: 12 inches (305mm) 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.
 
4.
Perimeter (Half-width) Sheets: 2.
5.
Perimeter (Half-width) Sheets: 3.
6.
Perimeter (Half-width) Sheets: 4.
7.
Perimeter (Half-width) Sheets: _.
3.9
SEAM WELDING
A.
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
 
B.
Overlay all splice intersections with VersiFlex T-Joint Covers.
C.
Probe all seams once the hot air welds have thoroughly cooled (approximately 30 minutes).
D.
Repair all seam deficiencies the same day they are discovered.
E.
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.
3.10
FLASHING
A.
Flashing of parapets, curbs, expansion joints and other parts of the roof shall be performed using VersiFlex reinforced membrane. VersiFlex 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 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.
3.11
WALKWAYS
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 VersiFlex Walkway 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.
3.12
DAILY 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.
3.13
CLEAN 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.
3.14
PROTECTION
A.
Protect installed products until completion of project.
B.
Touch-up, repair or replace damaged products before Substantial Completion.
END OF SECTION