WeatherLock FLEX is a polymer modified bituminous sheet material intended for use as underlayment. Underlayment is manufactured as a cross-laminated film surface coated with a self-adhering modified asphalt. Underlayment rolls have approximate dimensions of 75ft x 3ft. Underlayment is self-adhered.</p><p><strong>Ratings</strong></p><p><span style="text-decoration: underline"><strong>ASTM D1970<br></strong></span>Product&nbsp;has met specification requirements of ASTM D1970.</p><p><span style="text-decoration: underline"><strong>ASTM E108 (Fire)<br></strong></span>Product has met Class A requirements of ASTM E108 when installed over minimum 15/32in thick APA-rated plywood decks with allowable roof covers of asphalt shingles (ASTM D3462) or slate shingles (ASTM C406). Slope is unlimited.</p>" />

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Validated Products
Attributes
  • Listee
    • Owens Corning
  • Manufacturer Location
    • Brentwood, NH
  • Category
    • Roofing Material
  • SubCategory
    • Underlayment
  • Certification(s)
    • ASTM D1970
    • ASTM E108 Class A
Documents

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WeatherLock FLEX is a polymer modified bituminous sheet material intended for use as underlayment. Underlayment is manufactured as a cross-laminated film surface coated with a self-adhering modified asphalt. Underlayment rolls have approximate dimensions of 75ft x 3ft. Underlayment is self-adhered.

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ASTM D1970
Product has met specification requirements of ASTM D1970.

ASTM E108 (Fire)
Product has met Class A requirements of ASTM E108 when installed over minimum 15/32in thick APA-rated plywood decks with allowable roof covers of asphalt shingles (ASTM D3462) or slate shingles (ASTM C406). Slope is unlimited.