Roof underlayment is the last line of defense that protects a home from serious damage if a roof covering is blown off or damaged in a storm. Summit^® 180 synthetic underlayment by Atlas Roofing offers many advanced benefits not available with conventional felt. It is an approved underlayment for both new and re-roofing applications and can be used with most types of code-approved steep-slope roof coverings, including metal.

Ultra-Violet Resistance

On certain roof projects, underlayment may face a long exposure time from the dry-in to the completed roof covering. Atlas developed Summit^® 180 with performance characteristics that ensure its reliability during extended uncovered exposure to damaging ultraviolet rays. This lightweight, extremely strong, polypropylene fabric contains UV and water-resistant coatings that allow for up to 180 days of open exposure before being covered.

Summit^® 180 can withstand extreme temperatures from -40 F to 240 degrees F. Unlike conventional saturated felt, Summit^® 180 is not prone to wrinkling or buckling. This allows it to lie more flat, which helps a roof protect against invasion from water.

“Summit^® 180 has many great benefits. It is lightweight and extremely durable,” said Paul Casseri, product manager for Atlas Roofing’s residential division. “It weighs six times less than #30 saturated felt, yet has greater tear strength that allows it to remain exposed for a long time if necessary.”

Roofing crews benefit from a textured, wrinkle-free top surface and a slip-resistant coating applied to both the face and base surfaces of this underlayment. This dial coating slip resistance provides improved grip to allow safer walkability during installation.

Ratings Earned

Summit^® 180 synthetic underlayment exceeds ASTM D226 Type I and Type II, the standard specification for asphalt saturated felt. It has earned ASTM D6757, the inorganic shingle underlayment standard. It is also UL 790 compliant for fire resistance.

Summit^® 180 roof underlayment is packaged for convenience in 10 square rolls weighing approximately 30 pounds each. For more details on Atlas Roofing’s synthetic underlayment, contact an Atlas sales representative today.