Products / Grip-Rite ShingleLayment Premium

ShingleLayment Premium is Grip-Rite's heavy-weight mechanically attached synthetic underlayment, a woven 10x10 scrim polypropylene coated with non-skid polypropylene, used under any code-compliant steep-slope roof covering as an alternative to ASTM D4869 Type IV or ASTM D226 Type I and II felt. The product page and family sell sheet give 4 by 250 foot, 10-square rolls weighing 27 lb, 127 GSM, 8.5 mil, UV exposure up to 180 days, and a patented shingle-print option. The ShingleLayment family sheet lists ICC ESR-2945 under AC188 and ASTM D8257, ASTM D226, ASTM D4869 Type IV, CAN CSA A123.3-05, Miami-Dade NOA 24-0610.01 and Florida FPA 12510, and says the line is "Class A Fire Tested" without naming the test. The ShingleLayment warranty covers it for 25 years on a single-family residence and 20 years on other structures, though its remedy clause refers to a twenty- or fifteen-year term.