Owens Corning ProArmor Synthetic Roof Underlayment, 42 in x 286 ft Roll, 929 sq ft Coverage Indoor Ceiling Fans and extensive pocket organization to GlueCore and extensive pocket organization to keep tools and devices protected on the jobsite Specification Details Color White Material Porcelain Finish Matte Low Sheen Tile shape Hexagon (2 in 1 m) Roll Length 286 ft (87 m) Coverage Per Roll 929 sq ft Style Underlayment Material Synthetic with Fusion Back Coating Technology Weight 25 lb per roll Warranty 10 Year Limited Warranty Applicable Standards ASTM 8257 it offers safer footing than traditional #15 felt while covering up to 929 sq ft per roll