Decorating help nee...
 

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[Closed] Decorating help needed ..... Humidity and paint problem

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We are in the throws of decorating our bathroom.

The room itself has a cold spot in the corner of the two outside walls, this cn often be wet after the bath hs been used.

We prepped the walls and are using a bathroom specific paint.

The paint, that has bubbled and subsequently peeled, was applied before Christmas and dried without problem.

Wall is dry I.e. not damp/wet from the outside.

The room has an extractor etc.

The paint that we went back to and keyed is fine and doesn't seem effected by the humidity.

The rest of the paint seems fine.

Any suggestions?

Do I need a primer?

Wit until summer ........ Like I would get away with that .....


 
Posted : 14/01/2013 10:11 pm
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Sounds like a surface preparation issue. Either the area wasn't properly dry before painting* or there was something on the surface to draw moisture through. Paints are generally permeable to water, all you can do is slow the movement of water down. Household paint won't do this very well. If there is something soluble under the paint it will draw moisture through and form the bubbles/blisters. This is incredibly common for industrial paints in wet environments.

http://www.dulux.co.uk/products/info/bathroom_plus_soft_sheen.jsp

doesn't suggest any primers. So I'd be tempted to say strip it back and try again. Let it dry, clean it thoroughly with fresh water, clean it again.

*Although it may have looked and felt dry it might still have had water. A dehumidifier for a few days and not using the room (if possible might help.


 
Posted : 14/01/2013 10:26 pm
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Thanks Jonba.

Will give it a bash.

Hoping it might have been residual wall paper paste or something .... fingers crossed.


 
Posted : 15/01/2013 4:46 pm
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was this onto fresh plaster? mist coated?


 
Posted : 15/01/2013 5:05 pm
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No, thIs was previously painted plaster that had then been papered over.


 
Posted : 15/01/2013 8:54 pm
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+1 for Jonba. You could try priming with damp proof paint first. Wallpaper paste does nasty things to paint generally, its all in the prep.


 
Posted : 15/01/2013 9:10 pm
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Possibly a case of some wallpaper paste residue causing the new paint to fail. How thorough was your 'prep' prior to painting?


 
Posted : 15/01/2013 9:10 pm