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Is water enough before rendering on internal walls, that have had old plaster hacked off Be it red brick or blocks etc or should you definatly use SBR or PVA everytime

Hi Ive been asked to screed a small floor in an extension i plastered but not sure what prep i need to do on the concrete first if any ?

Whats the best mix for inside a fire place where theres going to be a log burner its thermolite blocks, is 6-1-1 scl right and is it best to not skim it. thanks in advance

When is it acceptable to use exterior pva If at all. instead of sbr Ive been asked to price a job rendering red brick that have a good key ie: swirly etched type bricks and was thinking of using pva instead of sbr any help much appreciated

Hi has anyone used one coat on thermolites and will two coats of pva be alright to hold it back or just water

What are those small black tar like spots you get in new render and will they fade any ideas

Hi all havent used this site for ages totally forgot about it how is everyone. Any way Ive been asked to render over existing exterior rendering, its an old 1950s ish solid old skool rrough render not painted its almost like someone has used a k rend scrather or stiff brush and wacked it all...