I have an external party wall that I have had cement rendered. The chap who did it left the bottom six inches not rendered - the rendering "resting" on a metal strip. Looks very good. He said he left the gap so that moisture would not get up the wall so easily and he suggested that I bitumen the bottom two courses. I would rather use a transparent sealer. Any particular type recommended please?
Sealing an external wall
Apr 11, 2011
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