Johns Manville TPO Membrane Installation Guidelines
Johns Manville TPO Membrane Installation Guidelines
| Notice to the Reader:
The instructions provided below are reprinted from the manufacturer's own materials which were submitted to the RoofStar Guarantee Program for inclusion in this Manual. The reader is urged to check these against current publications issued by the manufacturer, to ensure accuracy. |
Manufacturer: JOHNS MANVILLE CORPORATION
Contact Address: See Membership List in Section 1.
Product Group: JM TPO
Country of Origin: USA
1 Description
The roofing assembly / material information published in the RoofStar Roofing Practices Manual does NOT represent a complete set of the manufacturers published data, nor does it represent a detailed specification. The preparation of a detailed specification is the responsibility of the design authority.
JM TPO-45, JM TPO-60, and JM TPO-80 are thermoplastic polyolefin (TPO) membranes reinforced with a polyester fabric, and designed for use in mechanically fastened and adhered roofing applications.
1.1 GENERAL
USE
- JM TPO membranes can be installed in new, reroof (tear-off) and recover roof constructions. In recover construction, if the existing roof is sound, the JM roof can eliminate the cost of disposing of the original roof.
COLOURS
White, Grey and Tan
- Special colors are available with extended lead times. Minimum order quantities may apply. Contact your local JM sales representative for additional information.
| Standard Sizes | ||
| Color | Width | Length |
| White | 4 ft. (1.2 m) | 100 ft. (30.5 m) |
| 6 ft. 2 in. (1.9 m) | 100 ft. (30.5 m) | |
| 8 ft. (2.4 m) | 100 ft. (30.5 m) | |
| 10 ft. (3.0 m) | 100 ft. (30.5 m) | |
| 12 ft. 4 in. (3.8 m) | 100 ft. (30.5 m) | |
| Grey and Tan | 4 ft. (1.2 m) | 100 ft. (30.5 m) |
| 8 ft. (2.4 m) | 100 ft. (30.5 m) | |
APPROVALS
- JM mechanically fastened and adhered TPO Roof Systems are classified by UL (Underwriters Laboratories, Inc.) and FM Global (Factory Mutual).
| Energy and the Environment: | |||
| ENERGY STAR | Pass | Reflectivity: 0.78 | |
| Title 24 | Pass | Reflectivity: 0.78 | Emissivity: 0.87 |
| LEED | Reflectivity: 0.78 | Emissivity: 0.90 | |
| Recycled Content | |||
| Post Consumer: 0% Post Industrial: 3-5% | |||
| Producing Locations: Tuscumbia, AL | |||
| Results shown are for the initial reflectivity and emittance for white membranes; emissivity values for Title 24 are tested per ASTM C 1371; LEED emissivity values are tested per ASTM E 408. |
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1.2 MATERIALS
| NOTE: Regardless of the materials listed below or anywhere else in these manufacturer's guidelines, only materials accepted for use in the RoofStar Guarantee Program, or accessories associated with those materials, may be used to qualify for a RoofStar Guarantee. To see a list of the manufacturer's products accepted for use in the RoofStar Guarantee Program, click on the link above. |
1.3 EXECUTION
- Because JM TPO membranes are thermoplastic, they can be rolled out onto the roof substrate and easily welded into one homogeneous sheet using hot air welding procedures.
- JM TPO membranes can be mechanically attached or adhered to the structural roof deck in accordance with FM Global requirements, building codes, published standard fastening patterns or adhesives recommendations.
- Refer to JM TPO application guides, Detail Drawings and Technical Bulletins for instructions.
- JM TPO membranes meet or exceed all of the requirements of ASTM D 6878.
| ASTM | ASTM | TYPICAL | ||
| PROPERTY | TEST METHOD | MINIMUM | VALUES | |
| Weight, lbs./sq. ft. (kgs./sq. meter) | D 751 | - | - | |
| - | JM TPO-45 | - | - | 0.21 (1.03) |
| - | JM TPO-60 | - | - | 0.29 (1.42) |
| Thickness, in. (mm) | D 751 | 0.039 (1.0) | - | |
| - | JM TPO-45 | - | - | 0.045 (1.1) |
| - | JM TPO-60 | - | - | 0.060 (1.5) |
| Tolerance on Nominal Thickness | D 751 | +/- 10% | +/- 10% | |
| Thickness Over Scrim, in. (mm) | D 6878 Annex A1 | 0.012 (0.30) | - | |
| - | JM TPO-45 | - | - | 0.015 (0.38) |
| - | JM TPO-60 | - | - | 0.022 (0.56) |
| Breaking Strength, lbf (N) | D 751 | 220 (979) | 330 (1468) | |
| Field Seam Strength, lbf (N) | D 751 | 66 (294) | 75 (330) | |
| Elongation at Break of Fabric % | D 751 | 15 | 30 | |
| Tearing Strength, lbf (N) | D 751 | 55 (245) | 156 (694) | |
| Accelerated Weathering | G 151/154 | - | Pass | |
| Brittleness Point, Max., OF (°C) | D 2137 | -40 (-40) | -49 (-45) | |
| Ozone Resistance | D 1149 | Pass | - | |
| Properties After Heat Aging | D 573/751 | Pass | - | |
| - | Breaking Strength, lbf (kN) | - | 225 (1) | 330 (1.5) |
| - | Elongation at Fabric Break, Min. , % | - | 13.5 | 25 |
| - | Tearing Strength lbf (kN) | - | 55 (.25) | 156 (.7) |
| - | Weight Change, Max., Mass % | - | +/- 1 | -0.02 |
| Water Absorption, Max., Mass % | D 471 | +/- 3 | 1.2 | |
| Water Vapor Permeance | E96 | - | 0.012 | |
| Linear Dimension Change, Max. % | D1204 | +/- 1 | -0.01 | |
| Puncture Resistance, lbf (N) | FTM 101C | 200 (890) | 337 (1500) | |
| Method 2031 | - | - | ||
| E903 | - | - | ||
Refer to the Material Safety Data Sheet prior to using JMTPO. Material Safety Data Sheet is available by calling 800-654-3103 or online at www.jm.com.