Remove the black streaks, algae and mildew that are shortening your roof's life — safely, without high pressure.
Those dark streaks on your Florida roof aren't dirt. They're a living algae called Gloeocapsa magma — a cyanobacteria that feeds on the limestone filler in asphalt shingles. Left alone, it shortens your roof's usable life by up to 10 years, reduces energy efficiency (dark streaks absorb heat, attics run hotter, AC bills go up), and tells buyers "this house has been neglected" before they even walk inside.
Pressure washing a roof is never the answer. High pressure blows off the granules that protect asphalt from UV, cracks tile, voids manufacturer warranties, and makes the problem worse long-term. The only safe way to clean a roof is a professional soft wash — and that's what we do at Krystal Klean.
Our soft-wash roof cleaning process: we pre-soak landscaping around the house, often tarping delicate plants. We apply a professional algaecide solution to the entire roof at very low pressure (garden-hose level). The chemistry does the work — killing Gloeocapsa magma at the root, along with moss, lichen, and any other organic growth. After a short dwell time we gently rinse with low pressure. Landscaping gets rinsed and double-checked. Results often continue to improve over the following 1-2 weeks as dead algae fully releases from the shingles.
Every major shingle manufacturer endorses this approach. Our process meets the ARMA (Asphalt Roofing Manufacturers Association) standard. GAF, Owens Corning, CertainTeed — all explicitly require soft washing, not pressure washing, to keep warranties intact.
Every roof type: asphalt shingle (most common — soft wash with algaecide), tile (never pressure washed — cracks tiles and dislodges mortar — soft wash only), metal (gentle surfactant wash), flat roofs, slate, wood shake. Each requires specific chemistry and technique. Our technicians are trained on every roof type in Florida.
How long results last: typically 3 to 5 years on shingle roofs. We offer a 2-year spot-clean warranty. For coastal homes and homes under heavy tree cover, schedule every 3 years; everyone else, every 4-5.
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Real jobs, real Tampa Bay properties.
One team, one insurance policy, one invoice. Residential and commercial exterior cleaning across Tampa Bay.
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Learn more →422 verified Google reviews · 4.9★ average rating
"I couldn't be more impressed with the outstanding job Krystal Klean Exterior did on my house roof. Ben and his assistant were professional, efficient, and incredibly thorough from start to finish. They treated my home with care and delivered results that exceeded expectations. The roof looks fantastic—clean, refreshed, and better than ever."
"They did an amazing job went above and beyond to make sure that everything was nice clean and sparkling. I would definitely hire them again."
"Very pleased. They did a great job! The guys were really pleasant to work with...smiling and friendly. I will have them back."
"This was the second time we used Krystal Klean, the first was for pavers and this time was a tile roof softwash. Both services were excellent and the team members were super to work with. Last time we had our roof done, by another company, we had a ton of plant damage, this time the process that Krystal Klean used had no damage. We appreciate and recommend KK to anyone looking for these services."
"Justin and Chris did a phenomenal job cleaning my pool cage and roof after two hurricanes. I have not seen my pool cage this clean since we bought the house. They are very personable, detail oriented, have very competitive pricing and I will be using them regularly. Always glad to support a good local business. Highly recommended."
"Great company. Very polite and helpful workers that clearly knew what they were doing with excellent equipment. They did a fantastic job and made certain that we were totally satisfied with the job before leaving. I will definitely recommend them and seek them out next time I need to clean our tile roof."
We serve every city within a 50-mile radius of our Holiday, FL shop.
Free same-day estimates · No-obligation quotes · 4.9★ from 422 customers
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