Why do my shingles have dark streaks?
CERTAINTEED'S STREAKFIGHTER® ALGAE-RESISTANT TECHNOLOGY
HOW ALGAE-RESISTANT SHINGLES WORK
CertainTeed has developed shingles with StreakFighter algae resistant technology. These shingles are made with a blend of surface granules that includes numerous copper-containing granules. Copper possesses natural anti-algae properties, and the copper in the granules is gradually released over time to provide reliable, long-term protection from algae formation to help a roof maintain its true luster.
Landmark PRO provides the reliable quality of Landmark, along with greater durability and eye-catching Max Def colors. Engineered with two laminated layers to replicate the dimensional appearance of true wood shake, Landmark PRO offers peace-of-mind on projects that call for a premier aesthetic at an affordable price. Backed by a 100+ year legacy of trusted performance, all Landmark PRO shingles include CertainTeed’s industry-leading, lifetime-limited warranty.
- Certified as meeting the industry’s toughest third-party (UL) manufacturing quality standards
- Class A fire-resistance rating
- Fifteen year StreakFighter® algae-resistance warranty