has anyone ever used normal red/yellow building sand for rendering? i was told there was there too much clay in it (don't knowif this is true), i used to work for a plasterer when i was a young lad and he would use 50 / 50 red and yellow building sand and nothing else and his work is still on the wall so whats the story. oh and before any one asks, yes he did use a bit of cement as well!!!