Blown Plaster

If you're happy the cement render is sound then I'd brush with dilute PVA (3 water, 1 PVA) and re-skin. It's what I did on a section of wall on our old house a couple of years ago and it worked a treat.

Guy

-- -------------------------------------------------------------------- Guy Dawson I.T. Manager Crossflight Ltd snipped-for-privacy@crossflight.co.uk

Bought some plaster and some PVA - question - (The instructions don't help) Should the PVA be put on long before plastering to give it chance to dry - or is it put on immediately before plastering?

Don't know. I let it dry.

Guy

-- -------------------------------------------------------------------- Guy Dawson I.T. Manager Crossflight Ltd snipped-for-privacy@crossflight.co.uk

Dear John I would not use PVA but SBR (styrene butadiene) as it cannot reemulsify as can pva if soaked. read the instructions on the can but best to paint on the surface to be skimmed and WHILST STILL TACKY AND WET apply plaster mixed with glue in the water

This is on the assumption the render is sound and not full of hygroscopic salts (test with a meter in humid weather...) Chris

True, but the gypsom plaster will fail if soaked too, so there's no point worrying about the PVA failing.