Having said that, I have the same issue on my patio, which is basically made
of several pieces of concrete. I'm a bit worried if I get it pressure washed
all the cement will kind of be torn up as well. I know it can occur with
old concrete with large stones in it.

Brian

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From the Sofa of Brian Gaff Reply address is active
"DerbyBorn" wrote in message
18.142...
unknown wrote in news:ao9g1bFl88nU1
@mid.individual.net:

My house has an East-facing ground floor bit that is part flat roof,
part pan tiles and quite near a big tree. The moss on it getting quite
bad so I'm tempted to get out on the flat bit to "down-slope" pressure
wash the tiles (not the flat roof).
Is there any other way and, once it's clear, is there any way to slow
the moss re-growth?


I believe that having a copper wire along the ridge eventually causes the
moss to die (Google it).

When in Germany recently I noticed that most houses had slip glazed roof
tiles. Different colours - quite attractive.