ASTM D4897
ASTM D4897- Standard Specification for Asphalt-Coated Glass-Fiber Venting Base Sheet Used in Roofing Description: Abstract This specification covers the manufacture and requirements of Type II heavy-duty asphalt-impregnated and coated glass-fiber venting base sheet with mineral surfacing on the top side and coarse mineral granules on the bottom side for use as the first ply of …


