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Can anyone tell me why i sometimes get hairline cracks in my render? I wet the blocks down with a hose then leave 10 mins, on with the scratch coat. 4 plastering sand, 1 cement with waterproofer. Leave a few days then on with the top coat: 5 plastering sand, 1 cement ,1 lime. Apply top coat...

must say I am a bit confused by this. I have plastered onto dried out PVA loads of times and have never had a problem with it. The smoothest surface that i plaster onto is plasterboard and obviously never use PVA on that.I have read comments from all of you and am in no doubt that you know your...

Is it a given that you should plaster when PVA is tacky? The main reason that i have plastered onto tacky PVA is that it is the soonest opportunity to get on and spread the gear. Especially when spreading onto a bonded wall I like to PVA it the night before as i find it gives you more troweling...

Thanks micilin, i find i have to be careful not to add too much waterproofer to the scratch because it can leave the top coat with no suction. I've had water traveling to the bottom of the wall and washing away the bottom of the render before. Disaster! Now I tend to save most of the...

i am going to render some retaining concrete block walls in my garden and want them to be white. Will snowcrete, lime and plastering sand give me a bright white finish? Any advice?

Thanks for posting that picture breezer. laughed for ages. - bogan

When I did it I left the bead in place and plastered over it with a pretty good result but yours sounds like a good idea Richard so i'll try it next time.

Yes, i have used this method on a large ceiling before. Tack the stop end bead, which is like an angle bead with only one side, to the wall and plaster up to it. Then pva where your new plaster will meet the old and continue. This method is not as good as laying the whole wall on in one because...

I think an important issue here my be applying two coats of plaster. Firstly prepare the wall to be plastered with a coat of watered down PVA. If the background is very porous use a very weak mix first and then increase the concentration for subsequent coats, two more should be fine. Apply your...