Shingle Cleaning is Good When Done Right and Bad When Not

February 19th, 2009

Shingles can be cleaned properly without causing damage to them, and the major shingle manufacturers say so themselves. They even have suggestions and guidelines for shingle cleaning and removing algae off of asphalt shingles without harming them. The proper methods include a low pressure chemical application followed by a light rinsing.

They say you should never use a pressure washer on your roof. Inexperienced homeowners and contractors have damaged shingles by trying to blast the algae off the shingles using excessive pressure. Doing this washes the shingle grit off which is supposed to protect the shingles. Incorrect shingle cleaning can lessen the life of a roof suffering from roof algae. 

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