About Slateline® Asphalt Shingles
Slateline® Asphalt Shingles feature bold shadow lines and tapered cut-outs to create the appearance of slate at only a fraction of the cost of traditional slate. Now with GAF Time-Release Algae-Fighting Technology for long-lasting algae-fighting power so strong it allows us to offer a 25-year StainGuard Plus™ Algae Protection Limited Warranty against blue-green algae discoloration.1
125 year StainGuard PlusTM Limited Warranty against blue green algae discoloration is available only on products sold in packages bearing the StainGuard PlusTM logo. 30 year StainGuard Plus PROTM Limited Warranty against blue-green algae discoloration is available only on products sold in packages bearing the StainGuard Plus PROTM logo. See GAF Shingle and Accessory Limited Warranty for complete coverage and restrictions.