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Moss on concrete garage roof - clean and coat, or not?

Discussion in 'Roofing and Guttering' started by NorthnotNorth, 14 May 2019.

  1. NorthnotNorth

    NorthnotNorth

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    Thanks! I'd heard arguments along those lines, and if I was scraping moss off myself they would convince me to take precautions. I'm less sure how this applies to moss birds have picked off, though!

    I know the birds may face some exposure when pecking off the moss, but I'd guess wild birds don't live long enough for mesothelioma to be an issue for them anyway...so the question is more about exposure for people handling the moss after birds have pulled it off. I'd guess that wind, rain etc will take care of any fibres attached to stray lumps of moss?
     
  2. NorthnotNorth

    NorthnotNorth

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    Sorry - more exciting roof news... I've noticed that a bit of concrete was knocked off the edge at some point - see picture. Maybe in some of the storms we've had.

    It's nowhere that's going to cause a leak, but does this make a difference to roof longevity - or OK to still leave as is? Thanks!
     

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  3. banjodeano

    banjodeano

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  4. Harry Bloomfield

    Harry Bloomfield

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    Copper is heavy, fixed at either end, it will not move far.
     
  5. lostinthelight

    lostinthelight

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  6. NorthnotNorth

    NorthnotNorth

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    Thanks - will look again at copper. As in the picture, something has took a piece off the edge of one of the concrete panels. Is this likely to cause problems, or just something I can leave? It's not in a position where it'll cause a leak or anything, assuming it doesn't get worse.
     
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  7. Burnerman

    Burnerman

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    So long as the rain water drips into the gutter, everything is fine - if it doesn't, time for a patch of some kind.
    Regarding metallic copper, the effects of rain wash are absolutely minimal and strictly local to the position of the copper. I've been battling this for years as there is a lot of trees around me and moss growth is heavy......I put some 0.5mm strip copper along the ridge and sat back to watch the results.....effective, but only to the next couple of tiles down and then its as it was before :(
    If you want to clean your roof then wash it when the moss is already saturated - the asbestos fibres won't get airborne but if you are pressure washing, the results are a little aggressive so don't overdo it!
    John :)
     
  8. NorthnotNorth

    NorthnotNorth

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    Thanks. The rain should still run into the gutter fine - it was more whether damaging the edge of the concrete means the gap is likely to grow, or it'll just be as strong (or fragile) as it was before...
     
  9. Burnerman

    Burnerman

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    It will be fine - likely its just had a knock with a ladder, piece of timber or whatever.
    The golden rule.....keep off the roof as much as possible!
    John :)
     
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