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TYPAR Geosynthetics Root Control System
SECTION 32 91 16.19
Copyright 2014 - 2022 ARCAT, Inc. - All rights reserved

          ** NOTE TO SPECIFIER ** TYPAR Geosynthetics; reinforced rootzone grass and tree root protection system products.
This section is based on the products of TYPAR Geosynthetics, which is located at:
70 Old Hickory Blvd.
Old Hickory, TN 37138
Toll Free Tel: 800-541-5519
Tel: 615-847-7041
Email: request info
[ Click Here ] for additional information.
Typar Geosynthetics, Brand of Berry Global Inc., a global manufacturer of specialized nonwoven geosynthetics and netting solutions. With operations on almost every continent, We supply products to over 60 countries worldwide.
Berry Global Inc. works with a wide range of industries and markets and commands an enviable reputation for offering quality and affordable products as well as tailor made solutions to unique requirements.
Berry Global Inc. has made a commitment to developing new products. This commitment forms an integral part of our core business objectives.
This specification includes the BIOBARRIER root and weed control system manages roots through the slow, controlled release of Trifluralin, a non systemic herbicide that has been used in food crop production for more than 40 years. Nodules containing Trifluralin are through-injection-molded to 4-ounce-per-square-yard durable TYPAR GEOTEXTILE fabric, creating a continuous chemical and physical barrier against roots with- out impeding the flow of water, air or nutrients. Roots growing into the zone of inhibition are stopped, not just redirected, encouraging the plant to send energy to unimpeded areas of the root system, promoting healthy plant growth.
          PART 1GENERAL
          ** NOTE TO SPECIFIER ** Delete items below not required for project.
          A.Root control system.
          B.Underground structure root protection.
          ** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
          A.Section 31 20 00 - Earth Moving.
          B.Section 33 46 13.13 - Foundation Drainage Piping.
          C.Section 32 10 00 - Bases, Ballasts, and Paving.
          D.Section 32 39 33 - Artificial Rock Fabrications.
          E.Section 32 86 00 - Agricultural Irrigation.
          F.Section 32 90 00 - Planting.
          G.Section 32 92 13 - Hydro-Mulching.
          ** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.
          A.DOT Standards - _________ State Department of Transportation Standard Specifications.
          B.ASTM D 5261 - Test Method for Measuring Mass per Unit Area of Geotextiles
          C.ASTM D 4632 - Test Method for Grab Breaking Load and Elongation of Geotextiles
          D.ASTM D 4833 - Test Method for Index Puncture Resistance of Geotextiles, Geomembranes and Related Products
          E.ASTM D 4533 - Test Method for Trapezoid Tear Strength of Geotextiles
          F.ASTM D 4491 - Test Method for Water Permeability of Geotextiles by Permittivity
          G.ASTM D 4751 - Test Method for Determining the Apparent Opening Size of a Geotextile
          H.ASTM D 4355 - Test Method for Deterioration of Geotextiles from Exposure to Ultraviolet Light and Water (Xenon-Arc Type Apparatus)
          A.Physical and Chemical Requirements
          1.Fibers used in the manufacture of root control barrier substrate fabric shall consist of long chain synthetic polyolefins (at least 95 percent by weight) and a UV stabilizer. They shall be formed into a stable network such that the filaments or yarns retain their dimensional stability relative to each other.
          2.Nodules consisting of trifluralin, carbon black, and polyethylene compounded in a patented method utilizing time-released characteristics are permanently attached to the substrate fabric on 1-1/2 inch centers by a through injection molding process.
          3.All substrate property values, with the exception of apparent opening size (AOS), in these specifications represent minimum average roll values (MARV) in the weakest principal direction. The average test results of any roll in a lot sampled for conformance or quality assurance testing shall meet or exceed the minimum values provided herein. Values for AOS represent maximum average roll values.
          4.Property values for the trifluralin are average run values.
          1.Manufacturer shall provide a certificate stating the name, product name, style number, chemical composition and other pertinent information to fully describe the product. Manufacturer shall assure compliance with the requirements of the specification. Documentation describing the quality control program shall be made available upon request.
          2.Manufacturer's certificate shall state that the root control product meets requirements of the specification as evaluated under the Manufacturer's quality control program.
          3.Mislabeling or misrepresentation of materials shall be reason to reject those products.
          C.Sampling, Testing and Acceptance
          1.Root control substrate product shall be subject to sampling and testing to verify conformance with this specification. Acceptance shall be based on manufacturer's certifications.
          D.Physical Properties
          1.Active Chemical: Trifluralin (a,a,a-Trufluro 2,6 - dinitro - N,N, - Dipropyl - p - toluidine) 17.5%.
          2.Inert Ingredients: 100% Spunbonded Polypropylene, Polyethylene and Carbon 82.5%.
          3.Spunbond Fabric Unit Weight: 4 oz/yd2 (130 g/m2) ASTM D 5261
          4.Grab Tensile Strength: 130 lbs (575 N) ASTM D 4632
          5.Elongation at Break: 60% ASTM D 4632
          6.Puncture Strength: 37 lbs (175 N) ASTM D 4833
          7.Trap Tear: 60 lbs (265 N) ASTM D 4533
          8.Permittivity: 0.7 sec. ASTM D 4491
          9.AOS (Max Value): 0.21 mm ASTM D 4751
          10.Ultraviolet Stability: 70% @ 500 hrs ASTM D 4355
          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.Shop Drawings: Submit manufacturer's shop drawings including laying method and anchoring.
          ** NOTE TO SPECIFIER ** Delete the following paragraphs if LEED is not applicable.
          D.LEED Submittals: Provide documentation of how the requirements of Credit will be met:
          1.List of proposed materials with recycled content. Indicate post-consumer recycled content and pre-consumer recycled content for each product having recycled content.
          2.Product data and certification letter indicating percentages by weight of post-consumer and pre-consumer recycled content for products having recycled content.
          E.Samples: Submit manufacturers samples of each product specified.
          F.Manufacturer's Certificates: Certify products meet or exceed specified requirements.
          A.Manufacturer Qualifications: Manufacturer with a minimum for five years documented experience with the products specified and with ISO Certification certifying material compliance..
          ** NOTE TO SPECIFIER ** Select one of the two following paragraphs and delete the one not required. The second paragraph is required for use with the installation of Typar Biobarrier.
          B.Installer Qualifications: Installer experienced in performing work of this section that has specialized in installation of work similar to that required for this project. Installer must also be able to provide skilled workman with satisfactory record of performance on landscaping or paving projects of comparable size and quality.
          C.Installer Qualifications: TYPAR Geosynthetics approved Installer experienced in performing work of this section and who has specialized in installation of work similar to that required for this project.
          D.Preinstallation Meetings:
          1.Convene a preinstallation meeting a minimum of two weeks prior to start of weed and root control systems.
          2.Verify project requirements, subbase and base conditions, manufacturer's installation instructions and coordination with other related work.
          3.Require attendance of parties directly affecting work of this section, including the Contractor, engineer, installer, and manufacturer's representative.
          4.Comply with Division 1 requirements.
          A.Store products undercover in manufacturer's unopened packaging with labels intact until ready for installation.
          B.Protect materials during handling and installation to prevent damage.
          A.Maintain environmental conditions recommended by manufacturer for desired results. Do not install products under conditions outside manufacturer's absolute limits.
          B.In cold weather, do not use frozen materials or materials coated with ice or frost, and do not build on frozen base or wet, saturated or muddy subgrade.
          C.Protect partially completed work against damage from other construction traffic when work is in progress.
          D.Protect work areas from traffic during installation.
          A.Ensure that products of this section are supplied to affected trades in time to prevent interruption of construction progress.
          PART 2PRODUCTS
          A.Acceptable Manufacturer: TYPAR Geosynthetics, which is located at: 70 Old Hickory Blvd.; Old Hickory, TN 37138; Toll Free Tel: 800-541-5519; Tel: 615-847-7041; Email: request info; Web:
          ** 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.
          ** NOTE TO SPECIFIER ** Select Biobarrier system(s) required from the following paragraphs and delete the paragraphs for the systems not required.
          ** NOTE TO SPECIFIER ** BIOBARRIER Root Control System is used vertically to protects adjacent structures from root damage at Sidewalks, Landfills, Foundations, Tennis Courts, Retaining Walls.
          A.Root control system. Biobarrier Root Control System is composed of a 4-ounce per-square-yard, TYPAR geo-textile fabric with a pattern of 7/16-inch hemisphere nodules through-injection-molded with trifluralin to the fabric on 1.5-inch centers. Trifluralin root inhibition herbicide.
          ** NOTE TO SPECIFIER ** Select the width required from the following paragraphs and delete the paragraphs not required.
          a.12 inches.
          b.19.5 inches.
          c.24 inches.
          d.29 inches.
          e.39 inches.
          f.58.5 inches.
          g.Provide to the widths indicated on the Drawings.
          A.Before beginning installation, verify site conditions are as indicated on the Drawings. Notify the Architect if site conditions are not acceptable. Do not begin preparation or installation until unacceptable conditions have been corrected.
          A.Subgrade Preparation:
          ** NOTE TO SPECIFIER ** Coordinate the following paragraphs below with Fiberweb's recommendations and with subgrade requirements specified in Section 31 20 00 - Earth Moving Earthwork and, if required. Proper subgrade preparation and drainage is required to achieve required performance. Contact Fiberweb for additional recommendations.
          1.Prepare subgrade as specified in Section 32 10 00 - Bases, Ballasts, and Paving. Verify subgrade in accordance with manufacturer's instructions.
          2.Excavate area allowing for unit thickness and depth required.
          3.Provide adequate drainage from excavated area if area has potential to collect water, when working with in-place soils that have poor permeability.
          4.Ensure in-place soil is relatively dry and free from standing water.
          5.Uniformly grade base.
          6.Level and clear base of large objects, such as rocks and pieces of wood.
          ** NOTE TO SPECIFIER ** Select the Biobarrier system installation required from the following paragraphs. Edit as required to suit the applications required. Consult with the manufacturer's Installation Guidelines for additional information including recommended Biobarrier depths for different applications. Note that Biobarrier system must be installed by a Fiberweb's Approved Installer or be installed under the direct supervision of a Fiberweb on-site representative. Contact the manufacturer for additional information.
          A.Install BIOBARRIER Root Control Fabric system in accordance with system manufacturer's instructions and under the direct supervision of a TYPAR Geosynthetics Approved installer or TYPAR Geosynthetics on-site representative.
          B.Follow the EPA label instructions when installing. Wear gloves during installation.
          C.Install at areas as indicated on the Drawings.
          D.Coordinate installation with adjacent work as required.
          E.Dig a trench a minimum of 4 inches wide and at least two times the tree's canopy plus 10 feet along the areas to be protected.
          F.Prune tree and shrub roots back flush with the trench walls on both sides of the trench.
          G.Place Root Control System in the trench between the area to be protected and all roots.
          H.Install and cover Biobarrier as soon as possible but within a maximum of 12 hours after opening the seal package.
          I.Secure the fabric with landscape pins provided. Secure it flush or slightly above surface grade the surface grade so roots don't grow over it and against the wall of the trench opposite the root source.
          J.Do not allow gaps in fabric during installation or backfilling. When joining two pieces use overlapping, construction adhesive may be used to further secure the overlap. when overlapping, seams should be overlapped at least 6 inches or 4 nodule widths.
          K.Backfill the trench with soil containing organic matter and tamp it to ensure there are no gaps in the soil. Smooth soil surface to final grade on the side opposite the rood source.
          L.Beginning at one end of the trench, hold the product in place at the finished grade on the side of the trench adjacent to the hardscape and stake it into position. Secure with pins every 2 feet.
          M.Install hardscape over fabric as specified for the product to be used. Protect fabric from prolonged exposure until hardscape is placed.
          ** NOTE TO SPECIFIER ** Normal turf care procedures should be followed. Coordinate with Section 32 92 13 - Hydro-Mulching.
          A.Maintain planting areas in accordance with manufacturer's instructions and as specified in Section 32 90 00 - Planting.