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post #1 of 7 (permalink) Old 12-02-2016, 09:43 AM Thread Starter
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Roof

I have a property that there is obvious roof issues, however looking at the roof I only see moss buildup.

Has anybody ever given a bid to clean the moss off the roof??
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post #2 of 7 (permalink) Old 12-02-2016, 01:09 PM
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No, I have not run into this, but I tend to be a smartass and love to beat them at there own game....so here's what I would do.

There's a number of products that will clean this up with a simple spray and rinse.

Report it as "discoloration" and bid the full mold remediation going rate.
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post #3 of 7 (permalink) Old 12-02-2016, 01:32 PM
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Moss, if left on the roof for a long period of time will grow it's roots through the shingles into the house. If the ceilings in the house show water damage then the only solution is to reshingle that part. Possible replacing the plywood if its bad enough. Any other solution will result in the ceiling getting wet again next rainstorm.

If there is no ceiling damage in the house then it may not be to late to just remove the moss. Which is no easy task. You need chemicals and/or bleach plus a lot of scrubbing with brushes to get it all off. Then, this will only resolve the issue till next summer when it grows back. Only way I've seen to completely resolve the issue is to knock down whatever is causing the shade in the first place so the sun will dry the roof.
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post #4 of 7 (permalink) Old 12-02-2016, 05:04 PM
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If the moss is not terribly bad copper or

Quote:
Originally Posted by TripleG View Post
Moss, if left on the roof for a long period of time will grow it's roots through the shingles into the house. If the ceilings in the house show water damage then the only solution is to reshingle that part. Possible replacing the plywood if its bad enough. Any other solution will result in the ceiling getting wet again next rainstorm.

If there is no ceiling damage in the house then it may not be to late to just remove the moss. Which is no easy task. You need chemicals and/or bleach plus a lot of scrubbing with brushes to get it all off. Then, this will only resolve the issue till next summer when it grows back. Only way I've seen to completely resolve the issue is to knock down whatever is causing the shade in the first place so the sun will dry the roof.
zinc strips installed in the top courses can prevent it from coming back, once it is bleached and rinsed. I have this problem at my cabin. I use pool shock solution. And have recently about two years ago installed some copper and zinc strips. They are not a magic solution buy they do help keep it away longer than without.

I like safeguard dropout's bidding solution.

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post #5 of 7 (permalink) Old 12-03-2016, 12:13 AM
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Normally if that roof has a fine layer of lichens than the roof will definitely need to have them removed. If it's been an ongoing problem than the roots will eat into the roof decking and then you might as well replace all roof and decking since it's near impossible to get rid of.

Those zink strips seem to work for the areas a few rows below the run where it's installed. I "think" the metal leaches off in rain and runs down roof where it creates a barrier?

If you clean that roof be sure to use a nontoxic cleaner, not bleach, that won't kill the vegetation. I saw a roof, and siding, that we had bid to powerwash and obviously we never won the bid (commercial apartment complex buildings) and the numb nut who won the bid killed all the bushes and the grass 10' around each building.
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post #6 of 7 (permalink) Old 12-19-2016, 12:50 AM
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yes.. In Washington it is the common common bid item for us. You don't just spray and wash... you don't just throw powder... You either pressure wash it off (not recommended) or broom sweep it off (recommended) very hard bristle brush. even the metal bristle ones do a good job. You have to remove the moss. It is causing damages. It is degrading the integrity of the roof. It is an uninsurable condition if water damages are caused from it. Clean the moss. Use your blower to clean all the gutters too. Bid Roof and Gutters.
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post #7 of 7 (permalink) Old 12-19-2016, 12:53 AM
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Normally if that roof has a fine layer of lichens than the roof will definitely need to have them removed. If it's been an ongoing problem than the roots will eat into the roof decking and then you might as well replace all roof and decking since it's near impossible to get rid of.

Those zink strips seem to work for the areas a few rows below the run where it's installed. I "think" the metal leaches off in rain and runs down roof where it creates a barrier?

If you clean that roof be sure to use a nontoxic cleaner, not bleach, that won't kill the vegetation. I saw a roof, and siding, that we had bid to powerwash and obviously we never won the bid (commercial apartment complex buildings) and the numb nut who won the bid killed all the bushes and the grass 10' around each building.


we just brush all the moss off... The apply Moss killer to kill the Lichen left behind... Roof looks like new in a few days
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