moss removal on composition roof


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Old 12-30-09, 08:22 PM
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Question moss removal on composition roof

We just purchased a 101 year old house, very well maintained. The garage has some moss on the roof and our inspector said that the shingles are loose and leaking.

What is the best way to get rid of the moss, without further damaging the roof?

I have heard that pressure washing a roof is very bad for the shingles, and can cause premature failure.
 
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Old 12-31-09, 02:59 PM
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The shingles are loose and leaking?

Forget cleaning, you need a new roof.
 
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Old 12-31-09, 08:36 PM
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moss on composition roof - continued

What our inspector said was,
"Most of the tar strips securing the top courses of asphalt composition shingles to the courses below are failed; the shingles can easily be lifted and blown away by the wind. The faild tar strips are a sign the roof covering is nea4ring the end of its serviceable life and will likely need to be replaced soon."

The garage roof is not actually leaking at this time.

Our insurance company wants the moss removed before they give us the insurance that will let the financing go forward.

How do we get rid of the moss without further damaging the shingles?

 
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Old 01-01-10, 05:22 AM
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While a pressure washer will do a good job cleaning up the shingles - it will drastically reduce the amount of life left in the shingles!

You might try using some bleach water along with an old broom to wash and scrub the moss off. Not great for the shingles but probably the least invasive solution.

A little bit of silicone or roof caulking under the shingle tabs will help glue them back down......... but it might be a good idea to start saving for a new roof.
 
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Old 01-02-10, 12:18 PM
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A new roof is fine.... but we'd rather do it later....

Thanks, Mark!

We're hoping to make the roof last until later in the year, when it is more convenient to get it replaced. The silicone sounds a little labor intensive, and money might be better spent on a new roof.

The stupid moss is holding up the closing - because the insurance company want's us to do something, and we don't even own the house, yet.

We are happy with the deal, even if we have to replace that roof. we may just go with a different insurance company, to avoid this "have to do it now" attitude.
 
 

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