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-   -   Inside corners cracking with new paint (http://www.diychatroom.com/f4/inside-corners-cracking-new-paint-24488/)

n0c7 07-30-2008 12:27 PM

Inside corners cracking with new paint
 
Painting a new room, recently primed. The paint in all of the inside corners cracks as it dries. Second coat isn't completely hiding it. Any suggestions as to why its cracking and what to do about it? Sherwin Williams paint, decent brush, not applied on too light or too heavy... haven't run into this before.
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Jason@API 07-31-2008 12:13 AM

Seems like an odd situation, without being there to evaluate it, it's hard to say....

I would call up Sherwin Williams and have a Rep come out to look at it. Their pretty good for customer service. welll.... at least in my area.. ;)

Good luck!

slickshift 07-31-2008 01:43 AM

Which primer and how long of a dry/cure time?
Which SW paint? (they make several lines)

Regardless, a corner cut (brush just in the corners) should fix it

AtlanticWBConst. 07-31-2008 04:59 AM

New room: If it was recently drywalled, the corners are always the last to fully dry (compound). When compound is not fully dry, and it is painted, the paint will "crack".

Don't know if that is the situation, but I've run into such before...

n0c7 07-31-2008 11:15 AM

Quote:

Originally Posted by slickshift (Post 144542)
Which primer and how long of a dry/cure time?
Which SW paint? (they make several lines)

Regardless, a corner cut (brush just in the corners) should fix it

Sherwin Williams primer, Quali-kote, not sure which paint it is I'll have to look at home. The primer has been dry for at least a month, I've been hopping between projects. I'm going to try lightly sanding the corner with a fine crisp 90 degree sanding sponge and then cut in like you said.

n0c7 07-31-2008 11:16 AM

Quote:

Originally Posted by AtlanticWBConst. (Post 144550)
New room: If it was recently drywalled, the corners are always the last to fully dry (compound). When compound is not fully dry, and it is painted, the paint will "crack".

Don't know if that is the situation, but I've run into such before...

I was thinking that, but the primer has been dry for at least a month, so if the mud is still wet behind there I've got bigger issues. :laughing:

n0c7 08-01-2008 08:33 PM

I'm losing the battle here. I sanded all of the corners to the point where I could mostly see all of the cracks completely gone. I tried applying the paint the same way I always have, looks great, dries, cracked just as bad. I noticed while it was drying that small little black bubbles were forming and thats where the cracks showed up. That indicated to me that this paint does not like to be bulked up at all. So I tried painting in the corners with an almost dry brush, just enough to get some in the corner, and even this cracks but not as much.

:(

n0c7 08-01-2008 09:27 PM

Quote:

Originally Posted by slickshift (Post 144542)
Which primer and how long of a dry/cure time?
Which SW paint? (they make several lines)

Regardless, a corner cut (brush just in the corners) should fix it

It's Promar 200, flat latex.

n0c7 08-02-2008 03:53 PM

So I phoned SW and explained the situation. He said its not common for this to happen - figured it was a mudding issue. I explained to him that I used the same mud, same tools, same tape, same technique, and the same SW primer with cheap box store paint in my closet where I had to remove drywall for a plumbing repair, and no cracking occurred in the corners. He mixed me up a can of contractor(lower) grade Quali-kote paint for free and said to try it in the corners. Most of the cracks have disappeared after changed my technique and brushed lightly horizontally into the corners last night, we'll see how it looks in a few days.......... sigh


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