Safe, low-pressure soft washing that restores your roof without damaging shingles
If you have noticed dark streaks, green patches, or discoloration spreading across your roof, you are not alone. Atlanta's warm, humid climate creates ideal conditions for algae, moss, and lichen to thrive on roofing materials. These organisms are more than just an eyesore. They actively break down shingle granules, reduce your roof's reflectivity, and can shorten its lifespan by years.
Thrare Contracting provides professional roof cleaning services across the Atlanta metropolitan area using low-pressure soft wash technology. Unlike traditional pressure washing, which can strip granules and void manufacturer warranties, our soft wash process uses biodegradable cleaning solutions applied at safe, low pressures to kill algae and bacteria at the root. The result is a roof that looks new again without any risk of damage.
The black streaks you see on roofs throughout Atlanta are caused by Gloeocapsa magma, a type of blue-green algae that feeds on the limestone filler in asphalt shingles. Once established, this algae spreads rapidly across the roof surface, especially on north-facing slopes that receive less direct sunlight. Left untreated, the algae colony thickens, traps moisture against the shingle surface, and accelerates deterioration.
In Georgia's climate, moss and lichen also colonize roofs, particularly in shaded areas near trees. Moss roots penetrate beneath shingle edges, lifting them and allowing water intrusion. Lichen creates a chemical bond with roofing materials that is extremely difficult to remove once established. Our soft wash treatment addresses all three organisms in a single application.
We follow a systematic approach that delivers consistent results on every roof we clean:
Our soft wash process is safe and effective on virtually every roofing material used in the Atlanta market:
Regular roof cleaning provides several measurable benefits for Atlanta homeowners and property managers:
We work with property management companies, apartment communities, and commercial building owners across metro Atlanta. Our commercial roof cleaning services include multi-unit complexes where we clean 10, 20, or 50+ buildings on a scheduled rotation. We offer recurring maintenance contracts to keep roofs clean year-round.
As an MBE and DBE certified contractor, we qualify for diversity vendor programs at major property management firms and government agencies. We carry general liability insurance, and provide a certificate of insurance to a named holder on request.
We provide roof cleaning services throughout the metro Atlanta region including:
Call us or send an email with your property details and roof type. We provide estimates within 24 hours.
We soft wash roofs, low pressure with manufacturer-recommended cleaning solutions, never high-pressure washing, which can strip granules and void shingle warranties.
Roof soft washing is priced by roof size, pitch and the extent of organic growth. You see the price before you book.
Those streaks are Gloeocapsa magma, an airborne algae that feeds on shingle limestone and thrives in Georgia humidity. Soft washing removes it and slows regrowth.
Every 2–3 years for most homes, sooner for heavily shaded roofs.
Certificates of insurance are issued to your entity before mobilization rather than after, and additional insured or lender wording is handled at the certificate stage. Coverage detail is provided with the vendor packet rather than published here.