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My dad and I remodeled a bathroom (7’x11′) adding 30% new sheet rock on the walls and ceiling. We taped all the joints with a first coat and my dad had to return home. I finished the next several coats myself and consequently used a lot of mud. This of course led to much sanding and more mud, etc… The problem appeared when I applied latex dry wall primer and the first coat of semigloss latex paint. I scraped a small ding in the surface and both layers peeled off like a latex glove!!!!! The back of this layer was very gritty and I assumed that I hadn’t cleaned the wall good enough. I peeled the ENTIRE wall and ceiling and touched up the mud and this time I vacuumed, wiped and tack-clothed the whole thing twice. You could rub your hand on the wall and it was completely clean. I then primed with Zinser 1,2,3 and semigloss latex paint. It’s been a year now and I can still peel the #$%–@#$& paint off the wall like a glove and it’s gritty….. I will not peel the wall again!
Could anybody possibly explain what could be the problem?
I am planning on living here for the foreseeable future but I see the only solutions are “patch and paint” or “crowbar and sledgehammer” and start over.
I’ve never seen Joanne Liebler have this much trouble and I’m hoping the House Doctor shows up any minute……
Tnx in advance for any ideas..
gringoloco
Replies
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Gringoloco, you aren't the only one to observe this. I have seen it most often with PVA primer. The problem seem to stem from the fact that the primer has high solids, is much stronger in tension than its adhesion to the mud, and mud is very weak stuff. I solve this (and also eliminate "flashing," or uneven paint sheen due to differential absorbtion by the mud vs. the paper) by either applying Hamilton's Prep-Coat as my primer, or making my own by mixing some mud into my primer. This strange hybrid seems to bridge the gap between crunchy mud and stretchy latex paint. It goes on very thick and slowly by roller, and I am told it ruins the pump on an airless, but it does a lovely job, and stops the peeling you describe. Hope this helps.
Bill
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Bill, Tnx for an idea for the next bathroom job. I wish I had checked better when I peeled the wall before repainting. I think that I'm gonna have to live with this for now. We don't use this room as the primery bath so we should be able to avoid excessive contact with the walls. Maybe some cold winter day I'll get the urge redo the wall again........not!!!
tnx
bob
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Wallpaper! Jeff
*I've only painted 5 rooms with PVA primer over my own drywall and have had no problems.Did you use premixed mud?Is the mud hard to the touch?-Rob
*I've hung, taped, and primed with pva hundreds of sheets of drywall and never had any thing like that happen. I think there's something your not telling us.
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Rob, I did use premixed mud but it was very creamy. I did buy one premix that was in a box and it smelled "skunky". I used about half of the box but I know it didn't cover the entire wall. Also, Teddyolboy, I wish you had been here so I wouldn't have had this wonderful experience. Tnx for any replys
bob
*You might also try priming with a quality oil-based primer. I have used oil-based exterior house promers on old walls where adhesion was in question and had great results. You will have to wait a bit longer for the stuff to dry, but I have found it worth it when I have problems. I am not sure what you can do now that your walls are peeling again, short of repeeling like you did before. You need to eliminate the layer that has adhesion problems before you apply anything else over it. I agree with the earlier poster who suggested that the surface tension of the primer layer exceeded the strength of the bond to the drywall compound. Oil based products usually have greater adhesion than latex. The zinzer that you used was probably an alcohol (shellac) base and as such would have similar properties to a water based.
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My dad and I remodeled a bathroom (7'x11') adding 30% new sheet rock on the walls and ceiling. We taped all the joints with a first coat and my dad had to return home. I finished the next several coats myself and consequently used a lot of mud. This of course led to much sanding and more mud, etc... The problem appeared when I applied latex dry wall primer and the first coat of semigloss latex paint. I scraped a small ding in the surface and both layers peeled off like a latex glove!!!!! The back of this layer was very gritty and I assumed that I hadn't cleaned the wall good enough. I peeled the ENTIRE wall and ceiling and touched up the mud and this time I vacuumed, wiped and tack-clothed the whole thing twice. You could rub your hand on the wall and it was completely clean. I then primed with Zinser 1,2,3 and semigloss latex paint. It's been a year now and I can still peel the #$%--@#$& paint off the wall like a glove and it's gritty..... I will not peel the wall again!
Could anybody possibly explain what could be the problem?
I am planning on living here for the foreseeable future but I see the only solutions are "patch and paint" or "crowbar and sledgehammer" and start over.
I've never seen Joanne Liebler have this much trouble and I'm hoping the House Doctor shows up any minute......
Tnx in advance for any ideas..
gringoloco