thank you mate so along the black line? if i was to scratch it and not do it for a week or so and its over thermolite blocks btw. would u soak the wall with a hose b 4 u top coated
Please help. I'm rendering a extension it's thermolite block and I've put the scratch coat on but that was a week ago now and when I did 1 site it dryed very quickly and some bits just peeled off. I realise it was too dry but not sure how much water to put on the scratch coat first? Please help