We design our products to make installation easier and empower you to create high-performance wall and roof assemblies. Our team is constantly in the field, gathering feedback and exploring ways to enhance energy efficiency, moisture management, and streamline the process. That’s exactly what led to the development of VaporDry SA.
VaporDry SA, a self-adhered roofing underlayment, combines vapor permeability with a 100% fully continuous acrylic adhesive membrane. This innovative blend of a permeable trilaminate underlayment and acrylic adhesive creates a high-performance roofing system, improving the roof’s drying capacity while extending the lifespan of the roof deck.
Beyond performance, VaporDry SA is engineered for effortless roof underlayment installation. Here’s how:
Fastener Sealability
Though VaporDry SA does not require the use of fasteners during installation—which eliminates a step in the process—its self-sealability provides peace of mind when creating energy-efficient assemblies. In traditional non-self-adhered underlayments, fastener penetrations increase the chance of moisture intrusion. VaporDry SA’s ability to seal around fasteners keeps the assembly airtight and helps eliminate the risk of water entering through penetration points.
Repositionability
When installing VaporDry SA, if wrinkled or misaligned, it can be easily lifted off the roof deck, allowing imperfections to be corrected. Once repositioned, reapply pressure to stick it back down. The key to installing a self-adhered underlayment is to apply firm and even pressure to ensure its bond with the substrate.
Respositionability makes it easy to verify a smooth installation with minimal wrinkles. It also helps reduce waste and ensure proper installation to maintain a watertight seal.
VaporDry® SA Samples
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Walkability & Slip-Resistance
Safety when working on the roof is essential, and a slip-resistant surface helps reduce the risk of falls and injuries. VaporDry SA’s outer membrane provides excellent texture for underfoot stability. It allows workers to move confidently, improving efficiency and precision when laying shingles or tiles.
Printed Overlap Guides
VaporDry SA’s printed overlap guides provide an easy visual to properly align the overlap. This can speed up the installation process by eliminating the need to measure and mark the overlap manually. The guides ensure the underlayment is properly overlapped, which improves protection against water.
Roof Underlayment Installation of VaporDry SA
Not only does VaporDry SA provide advantages for an easy and more efficient installation, but the overall process is straightforward. It can be installed in temperatures down to 25˚ F when stored in a conditioned space at 40˚ F or above. For detailed, step-by-step instructions, explore our installation guide.
To learn best practices for installing roofing underlayment, visit our installation blog.
