Bathroom Paint Problem - Strange Peeling

98mustangguy

Next time You may want to take a 220 grit drywall screen and pole sander real quick the the ceiling /wall to just give a little scuff for the paint/primer to better adhere to

daArch

OK,

i've notice that some folks are jumping to conclusions that I did not read in Mike's ariginal post. Mike, tell me if I'm wrong or right.

First and most glaring. calcimine - although the bane of our existance here in Mass, Mike said it was blue board and plaster. although the house was built, in the 40's (hay-day of calcimine ceilings) it sounds like this ceiling was installed in the 60's - 80's (just a quess) I'm saying, no calcimine.

Second, my good friend PWG implies Kilz is a big Z product (correct me me if I'm wrong about that assumption). Just because it has a "z" on the end, don't make it a "Z" product. kilz is made by Masterchem Industries, Inc, .... and they lie also.
BUT, I 100% agree, kilz is not intended to be an all-over primer (i think that is on the can - or it used to be)

Third, another comment was made that there was poor adhesion to the 1940's plaster. Other comments made about layers and layers of paint in a 60 + old bathroom. Again, blueboard and skim coat - not 40's materials. AND Mike is talking about the PVA primer coming off the JC that was applied over the Kilz.

Plus other comments.

Hey, I could be wrong about what I read, but I did read Mike's original a couple of times.

My take ? Kilz was innappropriate all-over primer.

AND, I've NEVER liked PVA primer. Never trusted it. I know that's an arguable opinion, but it's mine.

I think the steam from the shower migrated through the PVA and re-wet the JC. I know an overly simple explanation - but usually the simple answer is the correct answer.

About 5 years ago we had moisture, steam, peeling, mold problems in our bath. I washed (bleach and water), scraped, sanded, and patched (all purpose JC). Applied two coats of Zinsser Perma-White. The ceiling is still in excellent shape (knock on wood) - and I'm no Zinsser fan, so I would not promote anything of theirs out of loyalty. They should have stayed ONLY in the shellac business, IMO

__________________
Wallcovering Installations by Bill Archibald|paperhanger|Eastern Mass|Greater Boston Area|Dover|Wellesley|Franklin|Sharon|MA

PlainPainter

Just a reality check, you can remove paint with those steamers you know - bathrooms can make lots of steam - and the more layers of paint - the more problems stack up. The only true way to paint something like that - is for homeowner to move out for a few months - to totally negate any unintentional sabotage. Who knows - a customer may have taken a shower after you left from your day of work - and totally ruined the outcome for you. Now I am just saying this from briefly perusing this thread - as I don't have the patience to read everything - this thread has gone too long.

joecrete

If concrete (old plaster is mostly hydrated lime)gets exposed to long periods of moisture it will react with the alkalys in them creating some salts that accumulate in the surface and iven if you wash the surface the salts still will come up and loose the bond of anything you apply on top. ther is chemicals abalable that will neutralize this efect.