When it comes to applying a metal, shingle, slate or mechanically-fastened tile roof, you need an underlayment that will increase the protection of your investment. Fulfill that need with CertainTeed's MetaLayment®. Clogged gutters, high winds and ice dams cause water to accumulate on lower sloped roofs which can cause damage. MetaLayment can combat these elements. It is waterproof, does not rip and seals around nails driven through it.

Technical Information

MetaLayment is a film-surfaced, self-adhering underlayment designed especially for use beneath metal roofing. It has been designed to resist weather elements for 6+ months to meet the needs of phased construction as well as designed to withstand the high temperatures commonly seen under metal, up to 250ºF. And, since MetaLayment meets ASTM D1970, it is also acceptable as an ice dam protection sheet under shingles, tile, and shake roofs.

  • Top Surface: Tear Resistant Film
  • Back Surface: Silicone-coated Release Film
  • Weight: 60 lbs. per roll
  • Dimensions: 39-3/8" x 61' ( 200 sq. ft.)
  • Thickness: 1.5mm (60 mils)
  • ASTM D1970
  • UL 790

For additional technical resources please refer to the CertainTeed Commercial Roof Systems Manual.


Apply CertainTeed MetaLayment by the "peel and flop" method, utilizing the two-piece split-sheet release film feature to adhere longitudinal halves, one at a time. It is best to cut the product into manageable lengths of about 10 feet when applying MetaLayment by this method.

For detailed installation instructions please refer to the CertainTeed Commercial Roof Systems Manual.

Warranty Details

MetaLayment is warranted against manufacturing defects for the same period as the warranty duration carried by the roofing material applied above it -- up to a maxium of 50 years.

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