Soft Wash Roof Cleaning in Lebanon, TN

Those black streaks running down Lebanon roofs are not dirt — they are Gloeocapsa magma, a bacteria that feeds on the limestone filler inside asphalt shingles. Left alone, it spreads across the shaded north slope first, holds moisture against the shingle surface, and shortens the roof's life while making the whole house look older than it is. In Wilson County's humidity, almost every roof over five years old has some level of growth.

The only safe way to clean an asphalt shingle roof is soft washing — a low-pressure application of cleaning solution that kills the bacteria and lets weather rinse the residue away. The Asphalt Roofing Manufacturers Association specifically recommends this method; high-pressure washing blasts the protective granules off shingles, shortens roof life by years, and voids manufacturer warranties. If a company offers to pressure wash your roof, that is the moment to hang up.

Our process: we protect and pre-wet landscaping, apply the solution from the roof edge or ladder — minimizing foot traffic on your shingles — let it dwell, and neutralize overspray as we go. The streaks begin disappearing immediately, and the treated roof keeps brightening over the following weeks as weather carries off the dead growth. Results typically hold three to five years, far longer than a house wash, because roof bacteria regrows slowly once killed.

We clean roofs across Lebanon — from established neighborhoods near the square to newer builds in Spence Creek and Hamilton Springs. Family-owned, based in Mt. Juliet, no subcontractors, and free written estimates with a photo assessment available same-day.