Sunday, February 21, 2010

I am re-painting the bathroom wall with the same colour as before, but the old paint is peeling of on roller?

Does anyone know why this might be?I am re-painting the bathroom wall with the same colour as before, but the old paint is peeling of on roller?
Let what you have done dry and prepare the surface. Remove flaking paint sand the surface and use a recommended sealing coat and then paint.





Ex Painter.I am re-painting the bathroom wall with the same colour as before, but the old paint is peeling of on roller?
What is the surface peeling down to? Is it old plaster, then oil prime, spackle and repaint. Is it a previous coating, then it wasn't properly prepared. spot prime(with primer made to adhere to glossy surface), repair, and repaint. I would recommend you prime with peel stop, and finish with permawhite bathroom paint. But even if you fix the peeling spots properly, it still may peel in the unrepaired areas.
when you painted last time you must have painted water based paint over oil based paint. you just need to prime you walls with some Kilz before you paint again.
The peeling is probably from having too many coats of paint on the wall already. Sounds like you are going to have to scrape the old paint off, sand the walls, possibly put down a primer then repaint. Sorry for the extra work!!!
This means the layer of paint that was already on there didn't properly adhere. Either it wasn't primed, or someone put latex over oil without priming. Especially in a bathroom, even if you are using the same color primer should be used first. Bathrooms should be done in Semi-gloss and new paint won't stick to semi-gloss very well, unless it has a built in primer.





You'll have to scrap the old stuff off. Anything that isn't peeling can stay, but you have to get the peeling stuff off. Then sand the edges help the wall look smooth. You could take spackle and try to make it level but that will take a lot of time and may not look any better. Then prime and paint. I will disagree with the individual that said you have to use oil based primer and paint, neither is true. Unless you know the paint on the wall currently is oil based there is no need to use oil based primer and paint. And if you primer first with a good primer, it shouldn't matter either way.





If you know the current paint isn't oil based you can use a paint with a built in primer. Zinsser makes an excellent one called Perma-White. It has a built in primer, will not allow mold or mildew to grow on the surface (a big plus in a bathroom!) and can be tinted to most light to medium colors.





Good luck!
the paint on the wall from before is either the wrong type of paint for a bathroom or the surface was not primed correctly before painting. to avoid this problem in the future, scrap the paint off the walls, prime with an oil-based primer and then repaint with a paint approved for bathrooms. the bathroom paint will probably be an oil-base too.
You have to find out why the old paint is peeling. Is it mold? or age? This has to be fixed before you paint. If you paint over dirt, mold, scum etc,. it's like painting on a removable film.If it isdirt or scum, clean with TCP. If it is mold, you have to find something that will not only kill the mold, but remove it. Then the first cover of paint should be KILZ.
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