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TRI-BUILT C 15 POUND FELT ASTM 4869 39 INCH 432 SQUARE FEET
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TRI-BUILT No.15 – ASTM D 4869 is a widely accepted underlayment product that is manufactured from organic felt and is saturated with asphalt.
TRI-BUILT No.15 – ASTM D 4869 underlayment is applied over the roofing deck before installation of asphalt shingles. It is recommended for use with 20 and 25 year asphalt shingles.