Call Marg: 705-446-1762

Do you ever notice roofs that have black staining on them that look something like this one below? I have seen several and more commonly, on houses in Stayner and Wasaga Beach.

They seem to be increasing in number and on a recent inspection of a home with this condition, the home inspector explained that it was an algae that is most common on north facing roofs and, that it is harmless.

Algae is naturally in the air and grows on surfaces where there is food such as lime which is commonly found in roof shingles as well as other materials. It also needs moisture so is more common in humid areas.

While it is commonly called Black Algae, it actually a dark blue-green in most cases. While it can look a bit frightening, in most cases, it is harmless to the roof and building structure. It is possible to clean a roof if it really bothers you and there are various websites with recommendations for doing so but they all agree, don’t use a pressure washer and that could do real damage

Marg Scheben-Edey is a Broker with RE/MAX four seasons realty limited, Brokerage in beautiful Collingwood, ON. With three decades of experience, Marg is a leader in the local real estate marketplace and is ready to help guide both Buyers and Sellers in achieving their real estate goals. Email Marg

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Marg Scheben-Edey

Real Estate Broker
Market Value Appraiser - Residential
Accredited Green Broker™
(designated by the National Association of Green Agents & Brokers)

RE/MAX four seasons
realty limited, Brokerage
Each Office Independently Owned & Operated
67 First Street, Collingwood L9Y 1A2

Contact Marg

 Direct: 705-446-1762

Prefer Text? 705-446-5066

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