Fraud Blocker Blue green algae Archives - iRestore Stl

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    Video: GAF StainGuard Plus™ Asphalt Shingles

    Video: GAF StainGuard Plus™ Asphalt Shingles

    Blue-green algae is a common problem that affects more than 80% of residential roofing systems in the U.S. While the dark stains do not affect roofing performance, they do leave noticeably ugly marks on your system. Here’s how GAF solves this problem with StainGuard Plus™ Shingles.

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