StressPly Plus membranes feature a high-strength, mineral-surfaced, UV-resistant, rubber-modified roof membrane designed for use as the waterproofing and reinforcement layer of a modified built-up roofing system. The sheets consist of a fiberglass/polyester reinforcement sandwiched by a unique Styrene-Butadiene-Styrene (SBS) in a high penetration index asphalt mixture containing post-consumer recycled rubber from scrap tires. StressPly Plus membranes are designed as the top component in a roofing system where fire retardancy is required. It can also be used with Garland’s HPR® products and conventional glass base sheets or fiberglass roofing felts. In addition, StressPly Plus membranes can be used as the top ply in a two-ply flashing system. It can also repair splits, cracks, and other deteriorated areas in existing asphalt-based roofing systems. Specifications are available for either hot or cold-applied systems.
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Method | Description |
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Hot-Applied | StressPly Plus membranes can be used with ASTM D 312, Type III or IV asphalt, Garland’s HPR All-Temp Asphalt or modified asphalt. One or two plies of ASTM D 2178, Type IV or VI fiberglass felt are solidly bonded to the approved substrate. The StressPly Plus membrane is then solidly adhered to these base layers with mopping asphalt. |
Cold-Applied | StressPly Plus membranes can also be applied in Garland’s cold applied Weatherking® or Green-Lock® membrane adhesive. One or two layers of heavy duty Garland approved ASTM D 4601, Type II base sheets are applied in Weatherking or Green-Lock membrane adhesive to the approved substrate. The StressPly Plus membrane is then adhered to these base layers with Weatherking or Green-Lock membrane adhesive. |
Physical Property | Value |
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Tensile Strength | StressPly Plus: MD 310 lbf./in. (54.25 kN/m) *XD 310 lbf./in. (54.25 kN/m) **MD 325 lbf./in. (57 kN/m) **XD 325 lbf./in. (57 kN/m) StressPly Plus FR Mineral: MD 310 lbf./in. (54.25 kN/m) *XD 310 lbf./in. (54.25 kN/m) **MD 325 lbf./in. (57 kN/m) **XD 325 lbf./in. (57 kN/m) |
Tear Strength | StressPly Plus: MD 500 lbf. (2224 N) XD 500 lbf. (2224 N) StressPly Plus FR Mineral: MD 500 lbf. (2224 N) XD 500 lbf. (2224 N) |
Elongation | StressPly Plus: MD 8.0% XD 8.0% StressPly Plus FR Mineral: MD 8.0% XD 8.0% |
Low-Temp Flex | StressPly Plus: -30° F (-34° C) StressPly Plus FR Mineral: -30° F (-34° C) |
Eco-Fact | Value |
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Solar Reflectance | StressPly Plus FR Mineral: 0.72 |
Solar Emittance | StressPly Plus FR Mineral: 0.90 |
SRI | StressPly Plus FR Mineral: 89 |
StressPly Plus membranes utilize post-consumer scrap from waste tires. With absolutely no sacrifice in quality, StressPly Plus membranes maintain Garland’s reputation as a manufacturer of high-performance roofing systems while benefiting the environment.
StressPly Plus membranes are reinforced with a fiberglass/polyester scrim that provides tensile strength in excess of 300 pounds per inch in the machine and cross-machine direction. The superior strength provided by the fiberglass/polyester scrim resists the movement created by today’s modern buildings. This translates to long-term resistance to splits and tears in the roof system.
StressPly Plus FR Minerals are coated with reflective mineral granules. Consequently, there’s no need to flood coat and gravel or aluminize the membrane’s surface. Roof projects can be completed on a more timely basis. The result is substantial savings in labor expenses.
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