Overview
The dark streaks you see on many asphalt-shingle roofs around Houston are typically algae. Roofs should not be cleaned with high pressure, because that can strip granules and shorten shingle life. Instead, pros use a soft wash: a low-pressure application of a cleaning solution that's allowed to work, then rinsed.
What's usually included
- Protection or pre-wetting of plants and landscaping
- Low-pressure application of a roof-cleaning solution
- Rinse and cleanup of gutters' outer faces and downspout areas
- Visual check for problem areas (the pro may point out damage, not repair it)
Good to know before you request a quote
- Mention the roof type (asphalt shingle, tile, or metal) and number of stories
- Check your shingle manufacturer's or warranty guidance on cleaning
- Ask the pro about the solution they use, and how they protect plants and runoff
- Roof work involves ladders and heights. Ask about insurance before hiring.
Pricing
What does it cost? Every property is different, so prices vary. Typical Houston-area ranges reported by Angi are about $266 for a house wash, $75–$225 for a driveway, and roughly $500 for a roof soft wash. Those are typical local ranges, not our prices. The quote from the pro may differ.
Who does the work
Katy Exterior Cleaning doesn't do the cleaning. When you send a request, we pass it to an independent local professional who serves your part of Katy. They contact you, look at the job, and give you their own quote. You decide whether to hire them.