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What to apply on plaster before painting walls?

Discussion in 'Decorating and Painting' started by punkyskully, 13 Mar 2012.

  1. punkyskully

    punkyskully

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    I've recently had my bedroom skimmed with plaster, he did about 3 skims on each wall as it was a little bit of a mess, he left me with a tub of PVA and said to dilute this with water and apply over the plaster in 3 days time, he said it will stop the plaster sucking in 3 layers of paint, is this correct?

    I typed it into google just to see how much to dilute it by and i found loads of threads warning me not to use PVA, and to use emulsion as the PVA will cause the paint to bubble and crack?, i'm really confused!
    I basically want to be able to paint the walls, i had the plastering done 4 days ago and i need to know what to put on the walls before i paint them?

    Please help :(
     
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  3. vibrobullit407

    vibrobullit407

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    Do not use PVA to prime your bare plaster it is not designed for this and will do what you have suggested with subsequent emulsion coats!

    Leave the plaster to cure for a min of 2 weeks for skim then apply a thinned non vinyl matt emulsion (30% water) as this will prime the walls. You can then apply 2 coats of your desired finish.
     
  4. punkyskully

    punkyskully

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    wow 2 weeks?, this guy told me 3 days! :eek: what would have happened if i had started painting today?
     
  5. joe-90

    joe-90

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    Your mum would give you a slap. :mrgreen:
     
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  7. joe-90

    joe-90

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    When it's pale pink you can paint it.
     
  8. punkyskully

    punkyskully

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    haha!

    it's pale pink now, it looks completely dry to me?
     
  9. joe-90

    joe-90

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    When it's pink I paint it. When it's dry its dry. Remember to thin it. 25%
     
  10. oldgreymouse

    oldgreymouse

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    If the walls have only been given a couple of skim coats of plaster, they should be about dry enough when the walls go from the damp brown colour to the lighter pink.
    Use Dulux 'Supermatt' at a mix ratio of 1.5 ltr of clean water to 5ltr of paint. This paint has no vinyl in it.

    Apply this thinned paint mix wall by wall, using brush around the edges as in the normal way, apply a second brush coat around the edges straight after the first coat then use a roller to fill in the main body of the wall surface again with 2 quick coats.
    This paint can be applied even if the wall or ceiling is still a little damp but I still like to see it pink first before I apply paint.
    After the Supermatt has dried for at least 24 hours, then you can go on to a colour using a normal vinyl emulsion paint.

    NEVER use PVA on new plaster. it is a sealer and bonding agent, it was never meant to be used as a prep for paint.
     
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