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marquis25 11-05-2011 05:44 PM

repainting an oil painted flaking bathroom ceiling
 
The house is 48 years old. About 15-20 years ago it was repainted with unknown oil paint over builder's original flat ceiling finish- type not known. The bathroom has been inadequately ventilated for most of this time. I have just added a ceiling fan. I have scraped off the flaking paint but am unsure how to proceed. I see previous posts dealing with flaking ceilings and painting with latex over oil-based but I am not sure that they apply to my situation.

Brushjockey 11-05-2011 07:20 PM

What sheen was the oil? How much of it was a problem?

My solution would be make sure it is clean from contaminates ( wipe down with a cleaner like Dirtex/ Krud Kutter etc) all loose paint removed, perhaps a quick sand to degloss.
Prime with Gardz - its thin so use a small nap roller.it will penetrate and seal.
Then skim coat with drywall mud, sand smooth, reprime ( gardz again if you want- but most good primer- sealers will do .)
Paint with eggshell 2 coats.

noquacks 11-05-2011 08:11 PM

I agree with brushjocky, just if you live in a humid environment, like, hey, who doesnt(?), I would go with satin sheen on ceiling, and for that matter, walls , if you ever get to that. Mold's "hyphae", or "roots" have a tougher time penetrating the higher the sheen. But if your in say, the southwestern US, probably no problem at all with even flat, for that mater.

marquis25 11-05-2011 09:19 PM

Quote:

Originally Posted by Brushjockey (Post 764533)
What sheen was the oil? How much of it was a problem?

My solution would be make sure it is clean from contaminates ( wipe down with a cleaner like Dirtex/ Krud Kutter etc) all loose paint removed, perhaps a quick sand to degloss.
Prime with Gardz - its thin so use a small nap roller.it will penetrate and seal.
Then skim coat with drywall mud, sand smooth, reprime ( gardz again if you want- but most good primer- sealers will do .)
Paint with eggshell 2 coats.

The oil appears to be a semi-gloss. I don't know if it has changed over the years, I don't think it was ever glossy. Do I prime the whole surface each time?

Brushjockey 11-05-2011 09:25 PM

If it was a semi that means it was a semi- glossy paint. The sanding is to get good adhesion to a glossy ( or semi) surface.
The first prime ( Gardz) is to achieve that adhesion and seal up the problem. yes - whole surface.
The second prime is to seal the skim coat- so wherever there is mud, prime it. but it is a bath, so not large- i would prime all for consistency .

chrisn 11-06-2011 04:49 AM

Quote:

Originally Posted by Brushjockey (Post 764623)
If it was a semi that means it was a semi- glossy paint. The sanding is to get good adhesion to a glossy ( or semi) surface.
The first prime ( Gardz) is to achieve that adhesion and seal up the problem. yes - whole surface.
The second prime is to seal the skim coat- so wherever there is mud, prime it. but it is a bath, so not large- i would prime all for consistency .

Not to get OT, but I have worked on bath ceilings that were bigger than my livingroom :eek:

Brushjockey 11-06-2011 07:57 AM

Quote:

Originally Posted by chrisn (Post 764766)
Not to get OT, but I have worked on bath ceilings that were bigger than my livingroom :eek:


Ya but you live in a cardboard box! jk:thumbup:

I have too for that matter. But I've never seen someone who has a bath that size be a DIY painter...

the_wanderer 11-07-2011 05:58 PM

Not to hijack the thread but I am doing similar in bathroom, old paint, mold and when i washed wall flakes came off revealing the drywall in various places one large spot is 2" x 10". can i just prime it, add thin layer of mud, reprime then repaint ?

Brushjockey 11-07-2011 06:08 PM

Same advise- but you need to kill the mold- a weak solution of bleach will do it- then follow above advise.


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