As a final layer of protection, this high-performance underlayment covers the entire roof after the WinterGuard™ application.  It's reinforced with fiber glass to provide extra resistance to wrinkling and tear out from fasteners.
Roofers' Select meets the underlayment requirements for the CertainTeed Integrity Roof System™ which is comprised of underlayments, shingles, accessory products and ventilation all working together.  The integrity Roof System is designed to provide optimum performance--no matter how bad the weather conditions are.  For more information regarding the Integrity Roof System click on the brochure link to the right.

  • Manufactured to meet all performance requirements of ASTM D226 and ASTM D4869 (including resistance to "liquid water transmission")
  • Manufactured to comply with ASTM D6757
  • Classified by UL to be a suitable underlayment for use in any UL Class A, B or C fire-rated shingle system
  • Roll Size: 432 sq. ft. (r squares)
  • Coverage:  400 sq. ft.
  • Length:  144 ft.
  • Width:  3 ft.
  • Weight:  44 lbs./roll

Underlayment is used under asphalt shingles for a variety of reasons, such as providing:
  • backup for water-sheading protection of the deck if shingles fail from wind-driven rain.  The lower the slope, the more important underlayment is, since water flows more easily under shingles on low slopes.
  • a protective barrier to the elements between the time the old shingles have been torn off and prior to the new shingle being applied.
  • an agent to hide minor imperfections of the decking material and reduce "picture framing:" of deck panels.
  • fire ratings (Class A) when used in conjunction with shingles.