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  1. #1
    Patrick Pisani's Avatar
    Patrick Pisani Guest

    Default Moss on a 3 tab asphalt roof

    HI Guys
    A friend asked what he can use to remove moss that is growing on his 3 tab asphalt roof. I was thinking about some type of cleaner or degreaser. Any ideas?
    THANK AGAIN
    PAT PISANI

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  2. #2
    Join Date
    Mar 2007
    Location
    Plano, Texas
    Posts
    4,170

    Default Re: Moss on a 3 tab asphalt roof

    Don't use a pressure washer.
    Use a chemical product designed for the task, but I don't have a brand name for you.
    Take a look here:
    Roof Cleaning Chemicals and Products Guide

    Jim Luttrall
    www.MrInspector.net
    Plano, Texas

  3. #3
    Join Date
    Feb 2008
    Location
    Caledon, Ontario
    Posts
    5,005

    Default Re: Moss on a 3 tab asphalt roof


  4. #4
    David McGuire's Avatar
    David McGuire Guest

    Default Re: Moss on a 3 tab asphalt roof

    Out of curiosity what is the source of shading on that side of the roof? Tree, other structure or what? He can remove the moss, but if he doesn't somehow increase the amount of sunlight and air flow on that part of the roof, it will come back at some point in time.

    Just make sure he heeds the advice no matter what he does and doesn't use a pressure washer. That is, unless he has money and can afford a new roof.


  5. #5
    Join Date
    Mar 2007
    Location
    Oregon
    Posts
    2,365

    Default Re: Moss on a 3 tab asphalt roof

    Quote Originally Posted by David McGuire View Post
    Out of curiosity what is the source of shading on that side of the roof? Tree, other structure or what? He can remove the moss, but if he doesn't somehow increase the amount of sunlight and air flow on that part of the roof, it will come back at some point in time.

    Just make sure he heeds the advice no matter what he does and doesn't use a pressure washer. That is, unless he has money and can afford a new roof.
    Or, if it's like the houses here in Oregon he'd have to tip it on its side (towards the sun) to keep it from growing

    We get A LOT of moss around here. I personally use a light solution of Roundup or similar weed killer. By far, prevention is the best avenue. Once it accumulates I think just treating it and waiting for it to die is the best thing to do. Maybe a light brushing with a broom but certinaly no pressure washer or wire brush. Once it dies it will usually just wash off the roof during a heavy rain.


  6. #6
    Patrick Pisani's Avatar
    Patrick Pisani Guest

    Default Re: Moss on a 3 tab asphalt roof

    thanks for the quick answers guys, he just had a tree removed and wanted to clean the roof.
    THANKS AGAIN


  7. #7
    Join Date
    May 2009
    Location
    Washington State
    Posts
    358

    Default Re: Moss on a 3 tab asphalt roof

    We get lots of moss here in Washington State too. Lillly-Miller "MOSS-OUT" works great as does "TIDE w/Bleach." Once the Moss turns black / is dead, I use a Corn Broom and sweep the roof sideways - going from gable to gable, not top to bottom - from ridge to gutter, that way the bristles remove the moss more thoroughly. Zinc Strips are old school technology, do not work well, and are not worth the money IMO.


  8. #8
    Michael Farha's Avatar
    Michael Farha Guest

    Default Re: Moss on a 3 tab asphalt roof

    After removal, you can prevent further growth by laying a copper wire across the roof.


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