Underlayment

Boral® Roofing LLC, a provider of durable and energy-efficient new and retrofit roofing systems, has introduced Boral Acrilay® roofing underlayment, an evolutionary underlayment product combining SBS modified asphalt with a proprietary acrylic adhesive. A single-layer system, the new underlayment offers improved adhesion performance compared to options that incorporate asphalt-based adhesives. Boral Acrilay roofing underlayment provides protection from weather stressors including wind and rain. Additionally, the easily applied underlayment reduces installation time, resulting in reduced labor costs.

Boral Acrilay roofing underlayment is ideal for use with all Boral Roofing clay, concrete, stone-coated steel, and composite roofing solutions, as well as for applications under shingles and most steep-slope roofing materials. The underlayment is available in Texas in addition to all Western states. One of the largest advantages of the acrylic adhesive in the Boral Acrilay roofing underlayment is it will not rapidly degrade or crack over time, as is common with other adhesives used by the industry including asphalt, silicone, and butyl-based options.

The single-layer underlayment can be quickly and easily installed without the use of fasteners, air compressors, or other equipment that can cause damage to the roof. For roof slopes over 8:12, back nailing is always recommended for safety. Application of the underlayment is ideal in a wide array of temperatures ranging from 40°F to 240°F. The acrylic adhesive is in its solid state therefore there is no need for heating the material when applying it in cold environments, nor will the material become viscous or sloppy in hot environments. The product is also easy to adjust during application.

With 6” strips of adhesive, and release liners to protect the adhesive at the toe and head laps, the underlayment adheres directly to the deck or itself allowing for over 27” of non-adhered underlayment between the adhesive strips. In a single-layered application, the bottom lap will have 2” of adhesive applied to the deck and 4” applied to the previous underlayment course. Double-layered installation will lap fully over the previous underlayment course and be adhered to the underlayment surface.

 

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