Our Money Back Guarantee:

If you are not satisfied, contact our office to arrange a prompt return visit to make things right. If you are still unhappy we will reimburse you for all of the service you were unhappy with.

4 Things You Should Know Before Hiring a Window Cleaner
  • Are the workers employees or subcontractors?
  • Have the workers undergone criminal background checks?
  • Have the workers undergone drug screening?
  • Does the company offer a guarantee?

Roof Cleaning Vancouver WA

Want Roof Cleaning in Vancouver WA?

When you notice moss or dirt buildup on your roof, you might feel like it would be a good idea to clean it off. But getting on your roof can be dangerous. This danger is compounded when moss or other slippery obstacles are standing in your way. Don’t take that risk. Instead, call the professionals at St Mary’s Window Cleaning Services for roof cleaning in Vancouver WA.

What treatments do your roof cleaning contractors do?

We offer two distinct treatments. The spray treatment is an effective way to maintain an already clean roof or a roof with a mild and thin spread of moss. An extensive roof cleaning treatment is used for tougher jobs. This all-encompassing roof cleaning service includes cleaning roof shingles, gutter cleaning, moss removal from roof, and much more. We stand behind our work, and though we can’t guarantee you’ll never get moss again our work does come with a 90-day guarantee.

When should you get your roof washed?

A spray-based cleaning is most important when moss hasn’t yet begun to clump on your shingles. It’s at this point when you can avoid the potential damage that comes with larger moss clumping. Moss may be growing even if you cannot see it. Once it begins to clump, it clogs gutters and downspouts which can lead to additional damage.


Can you do more than clean my roof? 

At St Mary’s Window Cleaning Services, we’re versatile home exterior cleaners. With many years of experience in cleaning windows and skylights, you won’t find a more professional glass cleaner around. But we don’t stop there. We can do pressure washing, gutters, and even put up your holiday lighting for you! 


We do detailed roof moss removal

Some types of moss are very difficult to remove. Killing these types before removing them helps reduce the amount of brushing, which reduces the wear and tear on shingles. Our comprehensive roof washing is what is needed once clumping has occurred and spray cleaning is no longer an option. Moss can cause extensive damage to a roof, such as:

Click here to see before and after pictures!

Roof cleaning Vancouver WA

Before roof cleaning

Roof Moss Removal

After roof cleaning

  • Roof Leaks – Moss can block water from running vertically off the roof, causing it to pool beneath the shingles. This causes water damage to the tar paper and roof sheathing, leaving the roof under-protected from the elements. This is the beginning stage of a costly roof repair.
  • Prying – Moss rhizomes are capable of reaching around the granules on your roof shingles. As these rhizomes soak up moisture and dry out again, their expansion and contraction cause granules to get pried away from the shingles. The result is shingles that are damaged and less effective.
  • Surface Tension Loss – Moss holds in moisture which disrupts the surface tension of the tar in your shingles, causing the loss of granules much like prying. Loss of these is critical,  as granules help protect your roof from UV radiation and absorb and dissipate day/night cycle heat.
  • Freeze/Thaw – When moss freezes and thaws it loosens up the granules on your shingles. When these granules are stripped the shingles actually lose their water repellent properties causing tar shingles to dry out.

Roof cleaning solution Vancouver WA


Fall, Winter, and Spring are peak growing seasons for moss, so make sure to stay on top of your roof cleaning in Vancouver WA! Now is the time to rid your roof of moss and mold. Guaranteed!

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Vancouver WA