The visual impact of a slate roof, without the cost
1 25 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.
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