Scotchgard Helps Shingles Resist Algae

Printer-friendly version

Black streaks often mistaken for dirt, mildew, sap or fungus on roofs might be Gloeocapsa magma, an algae strain that thrives in warm, humid environments.

November 01, 2003

 

3M asphalt shingles on a Sun City, Fla.-test house stayed algae-free for 12 years.

 

Black streaks often mistaken for dirt, mildew, sap or fungus on roofs might be Gloeocapsa magma, an algae strain that thrives in warm, humid environments. The algae can attack all roof types and take over within a few years of construction.

3M's Scotchgard algae-resistant roofing system for asphalt shingles combines copper granules (a known algae inhibitor) with standard 3M colored granules to guard against algae. A colored layer, or seal coat, covers the granules to preserve the copper's algae-inhibiting properties long term, 3M says.

Roofing manufacturers using 3M's algae-resistant system include Malarkey and Pabco.

Comments on: "Scotchgard Helps Shingles Resist Algae"

August 2017

This Month in Professional Builder

Features

Gehan Homes expansion into entry-level home building through...

Overlay Init