LeakBarrier: SBS MultiPurpose Underlayment
Q. Can I use SBS MultiPurpose Underlayment as an alternate for saturated felt?
A. Yes, it is can be used as an alternative for 15# and 30# asphalt saturated organic felt. In fact, unlike organic felt, the product lays flat and resists wrinkling. In addition, SBS MultiPurpose Underlayment uses inorganic glass fiber mat as a substrate, which permits greater exposure time than saturated felts and eliminates the rot prevalent with organic saturated felt.
Q. Can an entire roof deck be covered with SBS MultiPurpose Underlayment?
A. Yes, but only when the roof system is properly ventilated, including both ridge and soffit venting.
Q. Where can SBS MultiPurpose Underlayment be used?
A. SBS MultiPurpose Underlayment is designed for use under composition shingles, shake applications and all types of tile and metal roofing. It is especially well suited for use as a base sheet for modified bitumen, asphalt built-up and cold process roofing systems.
Q. Does SBS MultiPurpose Underlayment meet the ASTM specifications for saturated felt?
A. The product surpasses ASTM D-226 Type I and II standards for saturated felt and meets the rigid requirements of the ASTM D-4869 Four Hour Shower Test standard.
Q. What is the size and weight per roll?
A. This 2 square product is a 216 square feet roll and weighs approximately 72 pounds.
Q. Are MSDS sheets available?
A. Yes. Click here to view. Click here to download Adobe Acrobat.
