Finishing up a remodel and have a problem I have never seen. The house is 25 years old with tape and joint walls covered with various coat of latex paint. In the new section I had blueboard and veneer plaster applied There are 4 spots where the plasterer did corners that mate up with the old wall. He skim the veneer over the existing latex paint. Everything dried nicely and after a week we primed all the walls. Now when putting on the first coat of latex over these areas we get little bubbles in the paint. No bubbles in the all veneer section, no bubbles old section just along the transition. Recapping the layer 1) Drywall 2) Latex paint dry for several years 3) thin veneer plaster (happens most near the feathered edges) 4) New Ben Moore Latex Primer and underbody 5) New Ben Moore latex paint That then bubbles up. Anyone seen this have any ideas as to the reason, and what to do to fix???
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Replies
most of the experts are over at Breaktimeclassic
http://forums.delphiforums.com/breaktimeclass/start
You could go there and stay there if you don't like it here.
David.
Makes you wonder who this new member is, don't it. If it was one of the boys you'd think he'd have an answer once in a while.
When I have had Diamond Finish applied over existing walls, it's always been primed first. I don't recall the type of primer but I believe it's a USG product, and that it's not latex.
I'm guessing that the plaster
I'm guessing that the plaster is separating from the old paint. Give it a few days to dry thoroughly and the bubbles may flatten out.
Calvin thanks for the reply I think you are onto to it.
Thinking about it to more I came to the similar conclusion.
The other piece of data i didn't mention is that we did this in january in New England. We kept the room cool but it was really dry. (low humidity)
I am thinking that where the skim coat was really thin it dried out instead of curing. So when ever moisture gets to that thin layer(from the latex paint thru the latex primer. the curing reaction starts again in the plaster with the resulting out gasing.
Dreading sanding it down. going to test my theory by wetting the wall with water for a couple of hours and see what happens.
Is there and oil sealer I can put over the latex??? (always heard that was a bad idea)
thanks again.
I'm no painter, but have not
I'm no painter, but have not had a problem with non latex Bins.
Have used Shieldz on occasion, it dries quick, but is water based.
The Bins I used just lately was a spray can version. Fine if the area isn't that big.
Where I've seen bubbles (that
Where I've seen bubbles (that then break-leaving pinholes) is when you skim compound over old paint. I'm thinking your latex primer did not seal the finish like a coat of non latex primer would have-Binz for instance. The top coat reactivated (softened) the primer/plaster skim releasing water which formed the bubbles.
My drywaller will not skim or texture over an unsealed surface. Mentions problems similar to what your are experiencing.
Just last week I had a whole house painted after extensive remodeling. All areas patched, new, etc look beautiful. Except for one below grade area that we did nothing to. The new latex primer must have made it through the original ('60s) paint. Caused all sorts of lifting (cracking and flaking) right down to the orig. wallbd paper. I scraped it all down (easily removing most of the paint), primed with oil. Skimmed smooth and rollcoat with thinned mud to match. Re-primed and all is well. No evidence b/4 of any problem in this 25sf area.