Thursday, February 18, 2010

I have recently painted my bathroom wall, but the paint is peeling straight off in large sections any ideas y?

We have applied it over fairly new plaster, the type of paint is vinyl silk emulsion from B%26amp;Q own brand.I have recently painted my bathroom wall, but the paint is peeling straight off in large sections any ideas y?
Could be the plaster hasn't dried completely, or more likely the emulsion was too thick. On new plaster you need to dilute the first coat with water, about 50:50. This will soak into the plaster and seal it. Then give a normal coat.I have recently painted my bathroom wall, but the paint is peeling straight off in large sections any ideas y?
Defect: loss of adhesion; blistering and flaking or peeling off.





To prevent defect allow the wall do dry out before decorating. Prevent rain penetration or rising damp.





If the wall cannot be obtained in dry condition, use a porous alkali resistant paint (this very important)





Vinyl paint is impermeable and does not allow moisture to pass though it. Moisture form within the wall is drawn to the warm side of the wall. It needs to escape to the atmosphere when it does it push the paint of the wall.





Walls in kitchens and bathroom should never; I repeat never be painted with vinyl or gloss paint, always use the alkali resistant types.





What you want to happen it allow moisture vapour to move form within thw wall pass through the plaster and the paint. Paint of this types give a cooler finish to the wall surface. Therefore In rooms where a moisture ladened atmosphere it is likely condensation will occur that much faster. In the most extreme case condensate can be seen running down the walls. If for example there is a dirty make at the junction say of a plastered surface and a line of tiles this would be evidence on condensation.





The information above is given on the basis of the data you provide. There many and varied reason for the loss of adhesion. To give more in depth answer I would need information.





This answer is based both on scientific and empirical evidence.
You should first do a mist coat which is watered down emulsion. I tend to use 1 part water 4 parts paint and when dry i put on another coat of emulsion this time not diluting and then what ever paint you want. When you do a mist coat never use silk emulsion first always use matt as this causes it to peel also. Did anyone pva the walls after they was plastered as will cause loads of problems with paint not sticking to the pva and causing the paint to peel off the walls.
This happened in my parents bathroom, Its basically if you've plastered the plaster hasn't fully dried, so you may need to let the paint peel off and hire a heater or moisture filter to put in your bathroom for a week or so.


Then use special bathroom paint so the moisture doesnt get behind the walls again!
New plaster has to be primed before it is painted. Contact your local paint store and ask an expert how to fix this. (I don't mean Lowes or Home Depot - you could easily end up with someone who doesn't know any more about it than we do.) I mean Sherwin Williams or Benjamin Moore or whoever the specialty paint store is in your area.





It sounds like all the old paint will have to be removed first (maybe not a problem if it's all peeling off in large sections)...but you don't want to have to re-do this, and you don't want to end up having to re-plaster if you can avoid it.





Once you have the walls ready to paint again, prime first, then paint. We used Benjamin Moore Fresh Start when our bathroom walls had to be re-plastered....but again, get the advice of the experts here.





Good luck! (Are we having fun yet?????)
what you have not done is seal the plaster before painting , to seal the plaster you need a mix of water and pva 50 / 50 mix apply this to the wall or better still google sealing plaster before painting this will tell you all you need to know . also you will need to peel off all the existing paint . hope this helps
Soft Sheen and Silk paint does not readily soak into plaster so you must first paint a coat of Matt Emulsion on first. If you want, add 10% water or use Leylands Super Leytex.





Then, do the filling, sand the filler and Matt Emulsion the filler then emulsion out. The Matt emulsion on the filler will help to stop it from flashing.
2 things spring to mind. One is that you need to seal new plaster with a special paint as an undercoat. Second, did you buy Bathroom paint. The condensation means that it didn't seal when first painted on, and so is coming off. Try and scrape off all the loose paint before starting over. Good luck.
yep,paint stain blocker on first,let dry,then re-paint,pity you didnt get a brand name paint. takepaint back get a refund by telling them it doesnt cover properly and buy DULUX SILK.
Probably dampness and moisture.

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