Redoing a house. I started in the bedrooms by patching and filling holes
prior to painting. While working on the walls, the old paint (about 15
years old) would "wrinkle" where I was working. I worked a trowel under
the old latex paint layer and I can just peel the paint off the wall -
almost zero adhesion.
The original wall surface has a chalky-like quality to it. What can I do to
prep these walls for proper paint adhesion? Perhaps a TSP wash?
Any pointers really appreciated.....
Is it your house or are you working there.
You have a possibly a big probem , if the water in the compound affected
the old paint it was likely crap and put over a unprepped surface, ,
dirty, gloss or greasy. Chalky? , sounds like both coats are cheap
paint. Id try painting an area and see if it drys ok. Or scrape it all
off and do it right. No easy answer, if its a job stop and talk to the
owner before you are blamed. If its your place well its best to remove
bad paint. An oil primer would possibly not affect the undercoat, Oil
not alcohol base. But you are still seeling in crap it may or may not
work. Thats what happens when people buy the cheapest , dont prep and
think painting is just painting.
This house is a rental I maintain. It was so odd watching the top coat come
off in sheets - reminded me of plastic food wrap only ten times thicker.
I've scraped all the latex off and I'll try some experiments.....
It would help if you said what the old wall is. Plaster? Drywall?
Does the "chalky-like quality" rub off? If so, get rid of it and then
prime. If not, prime. Oil base primer.
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Are you sure it's not Kalsomine <sp> that has the chalk-like quality?
If so any latex paint over the top will eventually flake off in
sheets. I'd suggest you get off what you can (washing, scraping, etc)
and then prime with a shellac-based sealer.
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