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Blistered Newly Skimmed walls

Discussion in 'Decorating and Painting' started by Misguided, 17 Feb 2007.

This topic originated from the How to page called Preparing Walls and Ceilings.

  1. Third_Eye

    Third_Eye

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    The problem with sealing bare plaster with PVA is it does not allow the first coat of V/Matt emulsion to sink-in-to the PVA sealed plaster (as it should to enable strong adhesion). This can create many problems when someone decides to hang a wallcovering over it, i.e. when someone decides to strip the wallpaper it will tear and rip the first coat of emulsion that has been applied over PVA. This causes for a longerterm problem, with easily damaged painted surface only apparent once stripped. This is why your emulsion appears to go on like a dream over PVA but there are longerterm implications for this practice. Same when these DIY Shows etc explain that you PVA over bare brickwork etc to seal the surface before painting. This causes the paint to be more prone to flaking and loss of adhesion but is only apparent longerterm. Also, PVA can cause small blistering of emulsions.
     
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  3. Softus

    Softus

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    Not you though, estate agent. ;)
     
  4. joe-90

    joe-90

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    I've been renovating houses for years.

    Judging by the amount of time that you spend in the forum I'd say you were 'Self-unemployed'.
     
  5. Softus

    Softus

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    So you say, but it's clearly not long enough to prevent you filling your mouth with your feet when you express a 'professional' opinion, viz:

    http://www.diynot.com/forums/viewtopic.php?p=226698#226698

    http://www.diynot.com/forums/viewtopic.php?p=490889#490889

    Notwithstanding the fact that your judgment is apocalyptically poor, what I do for a living has no bearing on the fact that you very rarely know what you're talking about.
     
  6. Zampa

    Zampa

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    This came up in a question today...a trainee repied that you mist coat walls to 'seal' them...

    They aint being sealed the are being primed if anything.

    Oh and...the idea paint for painting newly plastered walls ..when they are a depth of more that the average skim is contract (non vinyl) emulsion to allow the wals to breath..

    If they are sealed any trapped moisture could cause the paint to blister and blow
     
  7. joe-90

    joe-90

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    You just never got over the fact I proved you a racist over the gypsy thing a year ago did you?

    I was right on both of those posts that you've dredged up. If I'm wrong - you prove it.

    You are on this board from morning, all day and most of the night. You don't work at all do you Softus?
     
  8. Softus

    Softus

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    Your pink handbag is showing. :D

    Of course you were. And everyone else was wrong. :rolleyes:

    I work when I want to, and I log on to the forum when I want to. I sense envy in your weakly-attempted insult. :D
     
  9. joe-90

    joe-90

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    I insult you daily - and it's spelt "weekly" anyway.

    You log on all night because you sit around all day.
     
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  11. Softus

    Softus

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    Blimey - even I credited you with more intelligence than that. :eek:
     
  12. joe-90

    joe-90

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    We Brits have what we call a 'sense of humour'. Maybe they don't have one where you come from (the planet Zog)
     
  13. Softus

    Softus

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    OK joe, enough is enough. You win hands down in the 'playground insult' contest; I'm no good at that.

    I don't know why you're so obsessed with when you think that I'm logged on to the forum - your e-presence is of little interest to me, so I guess I'll take it as a compliment and leave it at that.

    See on a different topic - I'm outa here.
     
  14. elimn8or

    elimn8or

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    I skimmed over one of my walls - waited for 2 weeks and then applied PVA like the manuals say. I left that for a week and then painted using bathroom paint from Duluxe. I have to say that I have had no problems and until now would have recommended PVA'ing newly plastered walls prior to painting.

    Ill have to keep an eye on it now - doh!
     
  15. Zampa

    Zampa

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    Out of interest...what books say you should use PVA?
     
  16. ModernMaterials

    ModernMaterials

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    michelangelo was painting on fresh plaster back in the early 1500's

    i dont know if he used pva to seal it tho :LOL:

    probly not...
     
  17. Zampa

    Zampa

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    :LOL: :LOL:

    Funny, he never said anything about it on here.. :rolleyes:
     
  18. DIYnot Local

    DIYnot Local

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