SlopeShield Plus Self-Adhered (SA) vapor permeable roofing underlayment is designed for use on steep slope roofs of 2:12 or greater pitch. The revolutionary roofing underlayment features the patent-pending Vapor Permeable Polymer Composite Technology (VPPCT TM) exclusively from VaproShield.
ADVANCED PATENT-PENDING TECHNOLOGY
SlopeShield Plus SA is engineered with Vapor Permeable Polymer Composite Technology (VPPCT TM), an advanced combination of polymer coatings and adhesive technology developed by VaproShield Research and Development.
The exclusive VPPCT process creates a new class of roofing underlayment capable of being watertight, vapor permeable, foot traffic friendly, with advanced UV durability.
SLOPESHIELD PLUS SA DIFFERENCE:
Traditional asphaltic and butyl-based peel-and-stick roofing underlayments offer liquid-water holdout but lack drying capacity due to their non-permeable nature. These underlayments inherently trap moisture, reducing insulation performance and accelerating sheathing decay—potentially causing premature roof assembly failure.
SlopeShield Plus Self-Adhered’s high drying capacity and black coloration (which absorbs heat from the sun when exposed during construction), accelerates the drying process of the underlying materials. This combination helps to mitigate construction moisture which would otherwise be trapped by a non-permeable roofing underlayment.
- Exceptional water and air holdout
- High drying capacity (vapor permeability, 30 perms)
- Long exposure times: 180 days before final roofing material application
- Durable to foot traffic, with excellent traction for installers
- Primerless application
- Suitable for all climates and geographic locations, including extreme temperature areas
Roofing System Compatibility
COMPLETE ROOF AND WALL WATER RESISTANT, VAPOR PERMEABLE AIR BARRIER SYSTEM
B Extending SlopeFlashing around gables and eaves ensures air barrier continuity
C WrapShield SA Self-Adhered or RevealShield SA Self-Adhered (for open joint cladding systems) vapor permeable air tight WRB/Air Barrier Wall Membrane for an air and watertight building enclosure with high drying capacity
Use SlopeFlashingTM — pre-cut for easy installation handling — for eaves, hips, ridges, and valleys.
DRAINAGE MATRIX FOR CEDAR SHINGLES/SHAKES
Cedar Shingles/Shakes require a ventilated unimpeded vertical drainage cavity to be incorporated into the roofing underlayment installation. VaproMat accomplishes this and is available as a corresponding accessory.
Hydrophobic filter fabric with polypropylene drainage matrix, installs over SlopeShield Plus Self-Adhered roof underlayment, available in two depths: 3mm, 7mm.
A COMPLETE BUILDING ENVELOPE SYSTEM INCLUDES:
Self-Adhered WRB/Air Barrier Wall Membrane options: WrapShield SA Self Adhered or RevealShield SA Self Adhered for open joint cladding.