Algae Growth On Roof Shingles

A method of inhibiting algae growth on an asphalt shingle surface exposed to varying humidity using a blend of copper containing algae resistant granules and non algae resistant granules.

Algae growth on roof shingles.

Patent 5 356 664 issued october 18 1994. Keeping branches trimmed back from the roof and removing any debris that begins to accumulate should be part of a regular roof maintenance program. Simple cover your plants just as painters do. That way whenever it rains some of the metal molecules will wash down the roof and kill any algae trying to regain a foothold on your shingles.

If the algae have damaged your roofing system a contractor can schedule repairs. Gaf royal sovereign golden cedar algae resistant 3 tab roofing shingles 33 33 sq. To keep the algae from coming back insert 6 inch wide strips of zinc or copper under the row of shingling closest to the roof peak leaving an inch or two of the lower edge exposed to the weather. The most effective method of cleaning algae and moss from a roof is w ith a 50 50 mix of laundry strength liquid chlorine bleach and w ater.

Using bleach is recommended by most shingle roof manufactures and the arma asphalt roofing manufactures association. The longer you wait the harder it will be to. A contractor can then recommend ways to prevent future algae growth such as special roof coatings or gutter replacement. Contact a roofing professional the day you notice signs of potential algae growth on your roof.