Membranes/Capsheets

StressPly® IV Plus / IV Plus Mineral / IV Plus UV Mineral

Superior Strength & Weatherability
Unmatched Reflectivity
Reduced Labor Expenses

StressPly IV Plus membranes are high-strength, polyester/fiberglass reinforced, rubber-modified roof membranes designed for torching applications. The 180-195 mil membranes offer high strength and a high percentage of quality blended Styrene-Butadiene-Styrene (SBS) rubber compound. StressPly IV Plus membranes incorporate a polyolefin backer to indicate when proper heat is obtained during application. StressPly IV Plus membranes can be used with Garland’s HPR® products, conventional glass base sheets, or fiberglass felt underlayment. In addition, StressPly IV Plus membranes can be used as the top ply in a two-ply flashing system. It can also repair splits, cracks, or other deteriorated areas of existing modified roof systems.

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Product Specifications

Method	Description
Torch-Applied	StressPly IV Plus membranes can be applied in a two-ply torch-applied modified system. Garland’s HPR Torch Base Sheet is applied to the approved substrate and StressPly IV Plus membranes are solidly torch adhered to the torch base sheet. StressPly IV Plus membranes can also be used as the torchable top layer of a modified roof system. Two plies of ASTM D 2178, Type IV or VI fiberglass felt are solidly bonded to the approved substrate. StressPly IV Plus membranes are then solidly torch adhered to these base layers.

Method

Description

Torch-Applied

StressPly IV Plus membranes can be applied in a two-ply torch-applied modified system. Garland’s HPR Torch Base Sheet is applied to the approved substrate and StressPly IV Plus membranes are solidly torch adhered to the torch base sheet. StressPly IV Plus membranes can also be used as the torchable top layer of a modified roof system. Two plies of ASTM D 2178, Type IV or VI fiberglass felt are solidly bonded to the approved substrate. StressPly IV Plus membranes are then solidly torch adhered to these base layers.

Physical Property	Value
Tensile Strength	StressPly IV Plus: MD 310 lbf./in. (54.25 kN/m) * XD 310 lbf./in. (54.25 kN/m) MD 430 lbf./in. (75.25 kN/m) XD 335 lbf./in. (58.63 kN/m) StressPly IV Plus Mineral: MD 310 lbf./in. (54.25 kN/m) XD 310 lbf./in. (54.25 kN/m) MD 430 lbf./in. (75.25 kN/m) XD 335 lbf./in. (58.63 kN/m) StressPly IV Plus UV Mineral: MD 310 lbf./in. (54.25 kN/m) XD 310 lbf./in. (54.25 kN/m) MD 430 lbf./in. (75.25 kN/m) XD 335 lbf./in. (58.63 kN/m)
Tear Strength	StressPly IV Plus: MD 510 lbf. (2269 N) XD 510 lbf. (2269 N) StressPly IV Plus Mineral: MD 510 lbf. (2269 N) XD 510 lbf. (2269 N)StressPly IV Plus UV Mineral: MD 510 lbf. (2269 N) XD 510 lbf. (2269 N)
Elongation	StressPly IV Plus: MD 9.0% XD 8.0% MD 6.0% XD 6.0% StressPly IV Plus Mineral: MD 9.0% XD 8.0% MD 6.0% XD 6.0%StressPly IV Plus UV Mineral: MD 9.0% XD 8.0% MD 6.0% XD 6.0%
Low-Temp Flex	StressPly IV Plus: -40°F (-40°C) StressPly IV Plus Mineral: -40°F (-40°C)StressPly IV Plus UV Mineral: -40°F (-40°C)

Eco-Fact	Value
Solar Reflectance	StressPly IV Plus UV Mineral: 0.72
Solar Emittance	StressPly IV Plus UV Mineral : 0.90
SRI	StressPly IV Plus UV Mineral: 89

Type	Link
Data Sheets	StressPly IV Plus Technical Data Sheet
SDS	3 Smooth Rolled Goods US Safety Data Sheet
	2 Mineral Rolled Goods Safety Data Sheet
	2 Mineral Rolled Goods CA Safety Data Sheet
	3 Smooth Rolled Goods CA Safety Data Sheet English/French
	Biflex Mineral Cap and Other Mineral Rolled Goods Safety Data Sheet
	Biflex Cap & Other Rolled Goods Safety Data Sheet
Benefits	StressPly IV Plus Benefits
Application Guidelines	Torch-Applied Two Ply Application Guidelines

Features

Superior Strength & Weatherability

The StressPly IV Plus membranes are reinforced with a high-strength, polyester/fiberglass reinforced scrim. The superior strength provided by the polyester/ fiberglass scrim in StressPly IV Plus membranes provides tensile strength in excess of 300 pounds per inch in the machine and cross-machine direction. This translates into long-term resistance to splits and tears in the completed StressPly IV Plus roof systems. The high-quality SBS rubber polymer in StressPly IV Plus offers unmatched low-temperature flexibility, weathering, and elastomeric properties.

Unmatched Reflectivity

The StressPly IV Plus UV Mineral membrane incorporates the unique mineral, providing long-term protection and energy savings. The superior reflectivity of this mineral protects the StressPly IV Plus UV Mineral membrane from UV damage and decreases under roof temperatures.

Factory Formulated Reduces Labor Expenses

StressPly IV Plus Mineral and StressPly IV Plus UV Mineral are coated with reflective mineral granules at the factory. Consequently, there’s no need to flood coat and gravel or aluminize the membrane’s surface. Roof projects can be completed more timely—result: substantial labor expense savings.

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StressPly® IV Plus / IV Plus Mineral / IV Plus UV Mineral

Product Specifications

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Features

Superior Strength & Weatherability

Unmatched Reflectivity

Factory Formulated Reduces Labor Expenses

Related Products for Torch Applications

Pro-Stop™ FR

SA Base IV

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