DIY Doctor UK DIY Forums

hi been plastering and rendering a few years lately having a problem with render blowing cracking and sometimes top coat appears weak ie easily marked when ladders leant against them i always soak walls first with water use washed plastering sand 4 sand 1 cement use addmixture everbuild 3 in 1 premium waterproofer plasticiser to slow down setting time then soak the scratch coat then apply top coat with 5 sand 1 cement again with add mix as above then float wall and sponge granted last job was on relatively hot day and sun was on wall all afternoon please advise

use a pva solution on the scratchcoat just before 2nd coat and add pva to the final mix.You dont need waterproof in the top coat just plastiser.

thanks was always taught not to use pva with cement though

[quote="dan007"]thanks was always taught not to use pva with cement though[/quote]
I have never heard of that,but if you dont want to use it you dont have to,its like adding a resin to the mix

many thanx your a star