Roof Washing with your pressure washing project
If you found this from pressure washing, pause: roofs are cleaned with low pressure and chemistry, not a driveway wand. Here is the short version - then the roof-cleaning specialists who own the full guide.
This page covers roof washing as part of a pressure washing project. For the full guide - every option, the complete process and detailed pricing - see our main roof washing guide.
What is roof washing?
Roof washing removes algae, moss and lichen from the roof surface. On asphalt shingles the accepted approach is low-pressure soft washing: solution does the work, water only rinses. High-pressure blasting strips protective granules and can void manufacturer expectations. If a pressure-washing crew offers to "do the roof while we are here" with the same wand used on your driveway, that is the wrong method in the wrong trade context.
How roof washing actually works
Identify roof material and condition first
Asphalt, tile, metal and wood want different chemistry and access. A roof near end of life may be cleanable in theory but too brittle to walk.
Watch forA same-day add-on quote with no roof inspection. Height, pitch and material decide whether the job is even safe.
Apply soft wash at low pressure - never driveway PSI
Cleaning solution is applied gently so it dwells on the growth. The rinse stays low-pressure. This is the opposite of flatwork surface cleaning.
Watch forAny wand technique that looks like house or driveway pressure washing aimed at shingles. Granule loss is cumulative and hard to see on day one.
Protect plants and gutters as part of the roof job
Runoff from roof chemistry hits landscaping and fills gutters with debris. Roof specialists plan plant protection and gutter clearing into the visit.
Watch forWall crews who treat plant care as optional because their usual job is siding, not roof runoff volume.
What does roof washing cost?
Roof washing is priced by roof size, pitch, material and access - not as a cheap add-on to a house wash. Multi-storey and steep roofs cost more because of safety setup. Full ranges live in the roof-cleaning and cost guides for that trade.
See the full roof washing cost guide - by material, size and region →
If the number is the problem, here are the ways people pay for it →
HomeMatchup does not perform roof washing. We match you with licensed local pressure washing pros for roof washing. Free for homeowners — Get matched free · how we verify pros.
When roof washing is the wrong call
When saying yes is the wrong move:
- You want high pressure because it "works faster." Faster granule loss is not a bargain. Soft wash is the method; speed is not the goal.
- The roof is already failing. Cleaning will not save cupping, widespread granule loss or active leaks - and walking it can make brittle shingles worse.
- A house-wash quote bundled the roof for a token extra. Different insurance, access and method. Price it as a roof job or skip it.
- You only need gutters cleared. That is a different service; roof wash debris will refill gutters if you reverse the order.
- You need the deep guide on algae, moss, tile or metal. Leave this short page and use the dedicated roof-cleaning services hub.
Roof Washing near you
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Sources
Sources last checked
- Water runoff and cleaning chemicalsU.S. Environmental Protection AgencyRetrieved 2026-08-04Stormwater discharge context when exterior cleaning enters drains.
- Occupational Employment and Wages — Construction TradesU.S. Bureau of Labor StatisticsRetrieved 2026-08-04Labor cost context for home-services trades nationally.
Sources for figures and claims on this page.
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