Question 1

Is pressure washing safe for asphalt shingles?

Accepted Answer

No — and we don't do it. High pressure strips the protective granules off asphalt shingles and can void your warranty. We soft wash roofs instead: low pressure plus a treatment that kills moss and algae.

Question 2

How is moss removed from an asphalt shingle roof?

Accepted Answer

We apply a soft-wash treatment that soaks in and kills moss, algae, and lichen down to the root. Heavy moss gets gently brushed off first. No pressure washer touches your shingles.

Question 3

What causes black streaks on shingles?

Accepted Answer

A type of algae that feeds on the limestone in asphalt shingles. It's ugly but it comes right off with a soft wash — and treating it early keeps it from spreading.

Question 4

How often should an asphalt shingle roof be cleaned?

Accepted Answer

Most roofs around Washington County do well every 2 to 3 years. If you've got a lot of shade or trees, or moss comes back fast, more often is better.

Question 5

Can roof cleaning damage shingles?

Accepted Answer

Not the way we do it. Soft washing uses garden-hose-level pressure, so there's no risk of lifting shingles or stripping granules like a pressure washer would.

Question 6

Does roof cleaning remove moss permanently?

Accepted Answer

It kills everything that's growing now. But moss spores are in the air out here, so it'll come back eventually — a treatment every couple of years keeps it under control.

Asphalt Shingle Roof Cleaning in Washington County, Oregon

Soft-wash roof cleaning that kills moss and algae without damaging shingles. Call or text (503) 278-1637.

Why Get Your Asphalt Shingle Roof Cleaned

Kills Moss and Algae at the Root

No Pressure Washer on Your Roof

Gets Rid of Black Streaks

Cheaper Than a New Roof

Our work

Get Your Roof Cleaned

Call or text (503) 278-1637 for a free roof cleaning quote anywhere in Washington County.

Frequently Asked Questions About Asphalt Shingle Roof Cleaning

Common questions about asphalt shingle roof cleaning in Washington County, Oregon.