Copper strip at the top?

Brian

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From the Sofa of Brian Gaff Reply address is active
"unknown" wrote in message
...
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?