Problems with cracked and blown rendering

Postby dan007 » Wed Sep 21, 2011 6:52 am

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
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