Specialized Surface Renewal
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Asphalt Shingle Roof Cleaning

Soft washing that removes algae, moss and dark streaks from asphalt shingle roofs, so the roof you have looks renewed instead of replaced.

Asphalt shingles are the most common roofing in our area, and shade, humidity and tree cover give algae and moss plenty to grow on. The dark streaks and green buildup make a good roof look years older than it is, and moss can hold moisture against the shingles.

High pressure is the wrong tool for shingles, because it can strip the protective granules and shorten the life of the roof. We soft wash instead: low pressure with a cleaning solution that breaks down the growth at the source, then a gentle rinse. The roof is renewed without being damaged.

What we deal with

  • Dark streaks and staining from algae
  • Moss along ridges, valleys and shaded slopes
  • Lichen and green buildup
  • Dirt and debris that make a sound roof look tired

How we approach it

  1. Look at the roof

    We check the shingles, the slope and the shaded areas before choosing how to clean.

  2. Soft wash

    Low pressure and a cleaning solution break down algae and moss without stripping the shingles.

  3. Rinse and renew

    We rinse the roof thoroughly and leave it looking renewed.

Cleaning renews a roof that is still sound. It cannot repair a roof that is leaking or failing, and roof replacement and repair are roofing work. If your roof is cedar or stone, see cedar and stone roof restoration.

Common questions

Can you pressure wash an asphalt shingle roof?

We do not recommend it. High pressure can strip the granules from shingles. We soft wash with low pressure instead.

What causes the black streaks on my roof?

The dark streaks are usually algae, which grows well in shaded, humid spots. Moss and lichen can follow. Soft washing removes them.

Do you replace roofs?

No. We clean and renew existing roofs. Replacement and repair are done by roofers.

Asphalt shingle roof partway through soft washing in Blowing Rock
Asphalt shingle roof partway through soft washing in Blowing Rock
Moss and algae along an asphalt shingle roof ridge in Blowing Rock
Moss and algae along an asphalt shingle roof ridge in Blowing Rock
Asphalt shingle roof soft washing in progress in Blowing Rock
Asphalt shingle roof soft washing in progress in Blowing Rock

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