Description:
G.A.P. 30 ASTM 4869 Type II felt is an underlayment product that is manufactured from superior quality organic felt saturated with asphalt. It is a Florida Building Code Approved product (code: FL # 2894.3)

Documents:
Product Data Sheet
SDS
Installation Instructions

Product Use:
G.A.P. 30 ASTM 4869 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 -ab shingles.

Material Performance:
ASTM D 4869 Type 1