The wall should of been prepped with a coat of what before the semi gloss paint was painted on the wall?

Question

I am having the same exact problem and our bathroom wall was just recently painted. Before it was painted it had semi gloss paint and it got repainted with semi-gloss paint and well my daughter started peeling it somehow. None of the other rooms that were painted are having this problem. So I need to know what goes on the wall before the white semi-gloss paint to make sure it doesn't peel?

Answer 1

Sounds like you have a moisture problem. Since you didn't have this problem anywhere else it's not the paint.

It doesn't matter what you do to the paint. You need to eliminate the moisture problem first. Latex paint will usually adhere to almost anything. If it is a bathroom, when someone bathes, is there a lot of moisture in the mirrors and porcelain fixtures?

You need to let the bathroom dry out so you need a window or exhaust fan.

Answer 2

A primer coat of paint.

Answer 3

primer

Answer 4

You could just go over old paint with some sandpaper to roughen the surface and provide a little profile for the new paint to bond. Otherwise, use a good quality primer.

Answer 5

You need to go over it with a latex primer before the semi-gloss. I usually use the one from Kilz. High quality and good bonding. Before priming though, it wouldn't hurt to go over it with TSP.

Answer 6

You are a little bit screwed right now(as you have got fresh paint(anything under a week old is fresh) on unproperly prepped walls which means it is gonna contue to peel) but I will tell the procedure of how I would have done it.

First and foremost, on the previous semigloss, the walls are washed down with TSP.  This will take off soap scum which will be on the walls even as a fine mist thru showering it will be on the walls....as well as dust and other loose matter.       Then I would sand the walls with 100(used) or120(new)grit sandpaper.   And sand it with a pole sander to scuff/scratch up the semigloss.      Then I would take a water dampened rag and wipe the walls clean to get the sanding dust off.(A quick wipe).   Now, if the surface is all painted(no patches) there is no reason you cannot paint with the new semigloss onto the old.   It will stick.   Being clean (#1)and those sanding scratches ensure that.    

  Why I didn't sand first and then use the TSP is because "if there is contaminate on the wall, and I sand ...sanding is like microgouging the surface.  I would be driving the contaminate into those gouges-----washing out the gouges is impossible.     So the contaminate remains in this case soap(and soap residue is like grease) Paint is sticking to the grease, not the other surface.    That is why it is peeling off.

    What are you gonna do now?    Leave it as good enough for awhile.

  For you basically got to try and lift it off, as much as you can with a 2 inch putty knife everywhere, clean it, sand it with 80 grit(hand sand-not machine), clean it, then when you are sure it is solid and clean, put on alkyd primer first.  Let that dry 2 days and then latex semi gloss.