Roof Washing

What Are Those Dark Stains on My Roof?

That Window Guy offers complete roof cleaning services that remove unsightly discoloration from your home or business. Call our team today for a free estimate.

The discoloration on your roof is caused by harmful bacteria (Gloeocapsa magma is probably the most prevalent of several algae) feeding on your roofing surface, specifically the limestone found in asphalt shingles. The bacteria ultimately cause your roof to decompose and give it an unsightly curb appeal.

The longer and darker the streaks, the more damage is being done to your roof. This erosion and granular loss causes shingles to weaken, discolor, harden, and crack. The ending result is a shorter life span for your roof, including the following:

• Higher utility bills — Bacteria cause your roof to absorb heat, making your home work harder and cost more money to cool.
• Unsightly curb appeal — Ugly roof stains bring down the cosmetic appeal and value of your property.
• Increased allergies — Bacteria create an increase in allergic reactions for people who are sensitive to these types of bacteria.
• Reduced life span for the roof and an earlier need for replacement — Mildew, algae, and lichens feed on organic material and can grow on any surface. When they feed, they break down the material, which decomposes and needs replacement sooner.
• Being dropped from insurance coverage — Insurance companies have been reported to warn and even drop coverage for roofs that are extremely dirty. Don’t put your family at risk! Call us for your free estimate on roof cleaning!

What Is Soft Washing?

Soft washing is a cleaning method using low pressure and specialized solutions to safely remove mildew, bacteria, and other organic stains from roofs and other building exteriors.

It is so named to differentiate the method from power/pressure washing. The Asphalt Roofing Manufacturers Association recommends low-pressure bleach or detergent-assisted washing as the preferred method for cleaning asphalt roofs in order to prevent damage to the shingles.

Roof Washing Photos