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Oil Based Primer... C-Dub 03-17-2007
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Posted by C-Dub on March 17, 2007, 2:48 pm


The house I'm in was built in Jan/Feb of '91 and has been painted
(interior) only once since then... I'm in the process of doing so now.

During the prep, I've found I'm able to scrape off existing paint (as well
as the popcorn ceiling texture) right down to the drywall in one pass
with a scraper!

Now, I realize that it's common for builders to blow ceiling texture on
without priming first . And so that discovery's not all that surprising. But
the walls too? Is this happening because the walls weren't primed?
Or could it be that conditions weren't right (too cold) for the paint to
stick?

I really have no desire to scrape any more of it off - not if I don't
have to. And so I'm looking for an out! I've heard that one way to deal
with popcorn is to apply a coat of oil-based primer, and then top coat it
with latex (or whatever). The reasoning being (I assume) is that the
oil-based penetrates the popcorn and *glues* the whole stinkin' mess
to the ceiling. The question is, Will the same trick work on my walls?
And is doing so advisable? Or am I just being *anal*?

Had I not discovered this *problem* I'd have been content to just paint over
everything and be done w/ it. But now that I know....... I'd prefer do it right.
Or as right as possible.

Any suggestions?

PexSupply QuikTrak 468x60
Posted by C-Dub on March 17, 2007, 7:04 pm




> > Had I not discovered this *problem* I'd have been content to just
> > paint over everything and be done w/ it. But now that I know.......
> > I'd prefer do it right. Or as right as possible.
>
> If you had just painted over it, it would have worked fine.

And so you're saying that I shouldn't have bothered at all with the
prep? And painted right over the chunks of falling debris instead? : )

[FYI - I was fixing a couple problem spots (it couldn't be avoided)
when I scraped off a bigger chunk than I intended. And this one
chunk led to another. And then another...]

> It is quite normal to be able to easily scrape texturing off of drywall.

Yeah, I sorta expected the ceiling to behave this way. But I was totally
surprised at the walls. And it's not like I've never prepped or painted
before either. I guess the stuff I've encountered in the past has been
pretty good by comparison. Apparently I've been pretty lucky....

Posted by Charles Schuler on March 17, 2007, 7:35 pm



>
>
>> > Had I not discovered this *problem* I'd have been content to just
>> > paint over everything and be done w/ it. But now that I know.......
>> > I'd prefer do it right. Or as right as possible.
>>
>> If you had just painted over it, it would have worked fine.
>
> And so you're saying that I shouldn't have bothered at all with the
> prep? And painted right over the chunks of falling debris instead? : )

Your original post made no mention of falling debris. You might have a
moisture problem.



Posted by C-Dub on March 17, 2007, 8:27 pm




> >
> >
> >> > Had I not discovered this *problem* I'd have been content to just
> >> > paint over everything and be done w/ it. But now that I know.......
> >> > I'd prefer do it right. Or as right as possible.
> >>
> >> If you had just painted over it, it would have worked fine.
> >
> > And so you're saying that I shouldn't have bothered at all with the
> > prep? And painted right over the chunks of falling debris instead? : )
>
> Your original post made no mention of falling debris. You might have a
> moisture problem.

I checked the attic when I first noticed the problem and didn't see
any evidence of a leak: no stains on the sheetrock or anything like that.
And since humidity is not really an issue here, I'm going to say, no, I
don't thing it's a moisture problem...

Posted by Charles Schuler on March 17, 2007, 8:45 pm




> I checked the attic when I first noticed the problem and didn't see
> any evidence of a leak: no stains on the sheetrock or anything like that.
> And since humidity is not really an issue here, I'm going to say, no, I
> don't thing it's a moisture problem...

Well then, (if the ceiling is falling in patches) you are dealing with an
improper installation and subsequent failure of the texture material which
will have to be removed. I fail to see how an oil-based primer will
penetrate through the latex paint and then through the texture material and
then bond to the paper coating on the dry wall. Good luck!



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