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synthetic slates gather moss - how to clean

Discussion in 'Roofing and Guttering' started by usignuolo, 25 Oct 2009.

  1. usignuolo

    usignuolo

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    We live in a conservation area with Victorian houses over 100 years old. Several local houses have been reroofed in recent years, using synthetic slates which are now growing moss around the joins and overlaps. My neighbour's roofer says this is a common problem, which you don't get on real slates. My neighbour wants to clean them but roofer said they scratch easily which makes the problem worse. Anyone got any suggestions on how to clean them?
     
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  3. HaydnExport

    HaydnExport

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    5 litres of bleach poured down each side, and collected(very important) through the downspout, you could do this a couple of times to be sure, and what you have collected back can be used again . The bleach will kill the moss, you could possibly jett wash the dead stuff off in a couple of weeks. Did this years ago for a bloke with concrete plaintiles , a bit unconventional but did work.
     
  4. moonman999

    moonman999

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    not recommended to pour bleach on your roof as it will end up in the surface water system. A good quality moss killer will do the job, but you will get piles of dead moss in ur gutters so they will need cleaning afterwards.
     
  5. Mw Roofline

    Mw Roofline

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    I think Haydn meant save the used bleach, not pour it down the drain!

    Tbh, each householder pours a litre of bleach down the toilet/sink/bath each month and considering there are a trillion householders.....
     
  6. datarebal

    datarebal

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    Where does the moss killer end up?
     
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  8. Mw Roofline

    Mw Roofline

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    Spose he just goes home for his tea? :confused: :D
     
  9. Alastairreid

    Alastairreid

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    :LOL: :LOL:
     
  10. HaydnExport

    HaydnExport

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    :?: I'm not the best with the written word, but i'm sure i managed to get across that you collect the bleach via the downspout and not let it go down the drain !!
     
  11. Alastairreid

    Alastairreid

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    you conveyed your message just rootin tootin fine haydn, some peeps just glance through the replies and may miss some crucial elements.........me included :LOL: :LOL:
     
  12. Topof

    Topof

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    First rule is to apply the moss killer so that the tile is saturated, but no or little product actually arrives in the gutter.
    If the moss killer is well chosen - Mossgo for instance - it will then degrade in non bio-accumulative compounds, and feed a meal or two to your local ground bacteria. Bleach leaves halogen compounds and should be avoided.
     
  13. DIYnot Local

    DIYnot Local

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