top of page


  • How are you different from the other companies?
    We focus on delivering the highest standards with a strong emphasis on providing you with the best customer service around. We return our calls within a reasonable amount of time, and take the time to explain the process to our clients.
  • Are you insured?
    Yes, we are licensed, insured, and certified by the Roof Cleaning Institute of America.
  • How do I know who to trust?
    We hold 100% customer satisfaction rating for our outstanding reliability, quality, and responsiveness.
  • Do you use subcontractors?
    Never! Every member of our crew works directly for Keystone Pressure Washing and Roof Cleaning.
  • Do you offer discounts or coupons?
    Yes, we offer various types of package discounts, and specials at different times throughout the year. We also offer reduced price maintenance plans, and 10% off for senior citizens. We also offer multi-unit discounts.
  • What can I expect when I call for a free quote?
    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.
  • What are the black streaks on my gutters and can they be removed?
    The black streaks on your gutters are in the oxidation layer of the paint. They can be removed with the correct chemicals.
  • I’ve heard that pressure washing is bad for a roof. Is this true?
    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.
  • What types of roof surfaces do you clean?
    We clean: Asphalt shingles, slate, barrel tile, and EPDM Flat roofing surfaces.
  • Will your chemicals damage my home or plants?
    No, all of our chemicals are eco-friendly. We also take special care to pre-wet all plants and landscaping and rinse when we are completed.
  • I was told my roof needs replaced because of the black streaks on it. Is this true?
    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.
  • How long does the process take to clean my roof?
    Depending on the size of the roof, our crew is typically completed within the same day.
  • Do I need to be present for the service?
    No you do not. We ask that all doors and windows are closed, and for the outside water source to be on. We also ask that all outdoor furniture is moved away from the surface to be cleaned.
  • If I would like to be present for the cleaning, do you offer weekend appointments?"
    We offer weekend and evening appointments to accommodate your busy schedule.


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

bottom of page