Andrew Mawson wrote:
"Richard" wrote in message
oups.com...
Our house roof appearance is being spoilt by lichen, is there
anything
on the market to remove it, and any good techniques for spraying it
without venturing onto the roof itself.


Short answer: No. anyway it can look attractive to my eyes

However if you can get someone to install a thin taut bare copper wire
either side of the ridge, rain (which is slightly acidic) will form
copper salts which washing down the roof will kill the lichen.

Some new builds in the countryside get roofs sprayed with cow dung
solution to promote lichen growth and blend in better with older
buildings

AWEM


I also have growth on my roof. The problem as far as I am concerned is
that it grows in golf ball size lumps, these are removed by birds and
weather, (leaving lots behind) then of course this blocks the gutters
and is dangerous on the paths. I removed all the ones I could reach
with a pole to which I had fixed an old hoe, however that only worked to
about 1/2 way up the roof, but at least the number coming down is
greatly reduced.