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TRI-BUILT F 15 POUND FELT ASTM 226 36 INCH X 144 FEET 432 SQUARE FEET
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Other products by TRI-BUILT
Tri-built no. 15 ASTM D 226 is a widely accepted underlayment product that is manufactured from superior quality organic felt that is saturated with asphalt. Line markings are placed on the top surface at 2" , 8 ½ ", 11 5/16", and 17" from each side of the sheet.
Tri-Built no. 15 – ASTM D 226 underlayment is applied over the roofing deck before installation of asphalt shingles. This product is highly recommended as an underlayment for architectural shingles and is not recommended for 20 year 3 tab shingles.