Roof Washing in Chattanooga
The black streaks running down an asphalt shingle roof are not dirt. They are gloeocapsa magma, a cyanobacteria that feeds on the limestone filler used in modern shingles. Left alone it spreads across the roof, holds moisture against the shingle and shortens the roof service life. On metal, tile and low-slope commercial roofs the same organic growth shows up as streaking and granule loss.
Chattanooga sits in a river valley that traps humidity and pollen, and the freeze-thaw cycles the city sees each winter work on exterior coatings from the inside, opening hairline cracks that then collect dirt and growth. Roof washing is a soft wash performed from the ground and from ladders. We do not walk the roof surface and we do not apply pressure to the shingles. A low-pressure, roof-safe solution is applied to kill the organism at the root, then rinsed with plain water. Removing the growth this way protects the shingle rather than abrading it, and it does not void the manufacturer warranty the way pressure washing does.
Roof surfaces and components we treat:
- Asphalt shingle roofs
- Metal and standing-seam roofs
- Tile and slate, method-dependent
- Mansard and low-slope sections
- Vents, boots and flashing
- Gutters, downspouts and drip edges
- Riverfront and downtown commercial property
- Industrial and logistics facilities along the I-24 and I-75 corridors
For property managers a clean roof is also a documentation issue. Algae streaking is one of the first things an inspector, a lender or an architectural review committee photographs, and a roof that reads as neglected invites questions about everything under it.
Commercial Roof Cleaning
Chattanooga, TN
Commercial roofs are usually out of sight, which is exactly why they get deferred. But streaking and organic growth on a roof are visible from the parking lot, from the building across the street and from every drone photo a broker or lender takes. We clean commercial roofs with a roof-safe low-pressure method that removes the growth without disturbing the membrane or the flashing. In Chattanooga that covers riverfront and downtown commercial property plus the industrial and logistics facilities along the I-24 and I-75 corridors.
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Multi-Family and Apartment Roof Washing
Chattanooga, TN
On an apartment community the roofs are the single largest visible surface, and algae streaking on the buildings facing the entrance sets the tone for the whole property. We treat each building with a roof-safe solution that kills the growth at the root, so the roof does not need re-cleaning every year, and we work building by building so no resident loses parking for long. Chattanooga multi-family communities see heavy spring pollen and a wet river-valley climate, and the shaded elevations are usually the ones facing the leasing office.
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