Summary: Roof cleaning is a task many have to do because moss,
lichens and algae can grow on shingles and other roofing materials.
Cleaning roof shingles with a pressure washer is possible. Roof shingle
cleaning needs to be done carefully with constant inspection to ensure
the shingles are not being damaged. I tested a powerful pressure washer
on my twenty-year-old roof and was able to clean it without any damage
to the shingles.
To post a comment you can return to the full article page
Comments
Rob Connelly
20 Mar 2008, 04:46
I will be roofing over my existing 3-tab asphalt shingle roof this summer.
Manufacturing instructions(GAF/ELK) indicated that the roof must be
properly cleaned prior to preforming the re-roof. What do you recommend?
More specifically I have only a couple spots or best described as green
clumps on the roof. How can I clean these?
AsktheBuilder
21 Mar 2008, 13:54
Rob,
There are any number of ways to remove it. Are you sure you want to go over
the old shingles????
Steve
13 Apr 2008, 15:45
My roof is discolored on the Northwest side so thank you for identifying
the problem. However, the pitch of my roof is pretty steep and I do not
wish to do the work myself. It's easily a 30 foot drop....no thank you.
What is a reasonable price for an experienced roofer/ contractor to perform
the work? Thank you again.
To post a comment you can return to the full article page
