"Trevor Appleton" wrote in message
...
We've all seen it on GF. Breeze block wall, rendered then painted.

My building supply geezer just laughed and told me the frost would bring
it
all falling down.

Any thoughts on how its done?

Trevor





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I would have thought that the main risk is from frost-shattering, where
water gets into the wall, freezes and expands cracking off bits of render as
it goes. The way to stop this happening would be to use some kind of sealant
to prevent the water getting in in the first place.