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Johns Manville EPDM HP Stone Mat, 15 ft. x 300 ft. Roll, UV-Resistant Polypropylene
Regular price $2,244.00Johns Manville EPDM HP Stone Mat, 15 ft. x 300 ft. Roll, UV-Resistant Polypropylene
JM EPDM HP Stone Mat is a nominal 7.0 oz/yd2 UV-resistant, needle-punched polypropylene fabric used as a protective layer between pavers or ballast and the EPDM membrane, and as a separating sheet in some recover systems. One roll measures 15 ft. x 300 ft. Compatible with mechanically fastened, fully adhered, and ballasted EPDM systems.
Key Features:
- Membrane protection: Acts as a slipsheet between the EPDM membrane and ballast or pavers.
- Heavy-duty fabric: Nominal 7.0 oz/yd2 (237.34 g/m2) needle-punched polypropylene construction.
- UV resistant: UV-resistant fabric suited to exposed installation stages before ballast is placed.
- Recover compatible: Can serve as a separating sheet in some recover systems.
- All EPDM assemblies: Compatible with Single Ply EPDM Mechanically Fastened, Fully Adhered, and Ballasted systems.
- Wide roll: 15 ft. x 300 ft. roll covers large areas with fewer laps.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville |
| Sell unit | 1 roll, 15 ft. x 300 ft. |
| Product line | JM EPDM systems accessories |
| Available colors | Black |
| Available sizes | 15 ft. x 300 ft. |
| Dimensions | 15 ft. wide x 300 ft. long |
| Material | Needle-punched polypropylene fabric |
| Weight | Nominal 7.0 oz/yd2 (237.34 g/m2) |
| Finish / texture | Needle-punched nonwoven geotextile |
| Coverage per unit | 4,500 sq. ft. per roll |
| Intended use | Protective layer between pavers or ballast and EPDM membrane; separating sheet in some recover systems |
Coverage & How Much You Need:
One 15 ft. x 300 ft. roll covers 4,500 sq. ft. as a slipsheet under ballast or pavers. Roll out with slight overlap at seams so the membrane stays fully protected across the covered area.
Fit and Compatibility:
Designed for use with Johns Manville Single Ply EPDM Mechanically Fastened, Fully Adhered, and Ballasted systems, and as a separating sheet in some recover systems. Ballast, pavers, and membrane are ordered separately.
Frequently Asked Questions (FAQ):
Q: What does one roll cover?
A: A 15 ft. x 300 ft. roll covers 4,500 sq. ft. of membrane as a protective slipsheet.
Q: What is the fabric weight?
A: It is a nominal 7.0 oz/yd2 (237.34 g/m2) needle-punched polypropylene.
Q: Where is it used on the roof?
A: Between pavers or ballast stone and the EPDM membrane, or as a separating sheet in some recover systems.
Q: Does it work with all EPDM installations?
A: The manufacturer lists compatibility with mechanically fastened, fully adhered, and ballasted EPDM systems.
Q: Is it sun-resistant during install?
A: Yes, it is UV-resistant, but ballast or pavers should be placed per the project schedule.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
Always roll the stone mat over the membrane before placing ballast or pavers on a JM EPDM roof; the 7.0 oz/yd2 weight is what stands up to stone handling traffic. Plan rolls so laps run with the drainage direction and keep the fabric flat and wrinkle-free. For recover projects, confirm with the JM specification that the mat is approved as the separating layer for your assembly.
Rolls are large and awkward; use two people or mechanical handling to unroll, and keep walkways clear of loose fabric on the roof.
Order the JM EPDM HP Stone Mat 15 ft. x 300 ft. roll to protect your EPDM membrane under ballast or pavers.
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