need to render a thermalite internal wall have read up on it and a bit confused.
was going to wet wall and put on a 5to1 diluted pva mix then when its tacky start to sand/cement render ,but have read of people putting on two coats, one on the day before then 2nd when they render. Are two coats better or would one do ?.
thought with the dried coat of pva it may seal the blocks and make it harder to get good suction on the render.
the other point was its recommended to do 6 /1/1 sand lime cement or 6/1 with plasticiser mix for thermalite . haven't used lime before so was going to just use the 6/1 plasticiser . but as the blocks are prone to cracking would i be better off adding lime for the extra flexibility is it worth the extra cost.
thanks
was going to wet wall and put on a 5to1 diluted pva mix then when its tacky start to sand/cement render ,but have read of people putting on two coats, one on the day before then 2nd when they render. Are two coats better or would one do ?.
thought with the dried coat of pva it may seal the blocks and make it harder to get good suction on the render.
the other point was its recommended to do 6 /1/1 sand lime cement or 6/1 with plasticiser mix for thermalite . haven't used lime before so was going to just use the 6/1 plasticiser . but as the blocks are prone to cracking would i be better off adding lime for the extra flexibility is it worth the extra cost.
thanks