
ROOF WASHING FAQS
ROOF WASHING QUESTIONS?
ROOF WASHING ANSWERS
You should expect to speak with our owner, who will review and discuss your request. He will explain what to expect in the process. You would then receive a written proposal via mail or email, whichever you prefer. Should you decide to use our services, our scheduler would contact you to set up an appointment for the service.
You’re correct! A roof should not be pressure washed as it will void the warranty on your roof and damage the shingles. At Keystone Pressure Washing and Roof Cleaning we use a Non-Pressure Roof Cleaning soft wash method with no pressure applied. So,Instead of using high water pressure and force-heavy cleaning, we use safe pressures and specially blended cleaning solutions to remove all of the grime and dirt from your building exterior. It’s an effective cleaning method for exteriors of all materials, and we use it frequently on vinyl, wood, stone, brick, and stucco.
No your roof does not need to be replaced. Most of these stains are called by algae (gleocapsamagma) which is airborne and can land on any roof surface. It feeds on the limestone fillers in the shingles and when it rains the algae is spread down the roof surface. This causes the streaking/staining. Not only can we clean the streaks and staining, but we can prevent it from coming back. Shingle manufacturers recommend that you clean your shingles on a regular basis. For more information read Don't Replace It, Clean It!, a technical bulletin published by the Roof Cleaning Institute of America and Algae Discoloration of Roofs, document was prepared by the Asphalt Roofing Manufacturers Association.

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Keystone Pressure Washing and Roof Cleaning, LLC, is a Pittsburgh based, family owned and operated business. We take pride in our work and our clients are our #1 priority. We use state of the art equipment and methods to treat and erase cosmetic wear, and unsightly stains. To us, details matter.
- Joe Botti, Owner