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Paint Bubbling Up

 
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Old 04-15-2019, 05:20 PM   #1
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Paint Bubbling Up


I had this happen on a small scale once. I painted over an already painted wall. A small area about 3x4” bubbled up, the old paint that was on the wall separated from the drywall and made a bubble. I scraped it off let it dry out spackled the area primed it and re painted it. Today a customer wanted a few visible drywall seems feathered out before painting. I skim coated the seems with spackle to repair the area. I looked at it a few hours later and the wall was all bubbled up under the spackle. Some areas like 12x12” and others anywhere from 3” to 6” circles. The spackle was starting to dry and I could push on the bubbles. I’m assuming the paint that was under the spackle got moist and separated from the wall. I bought it to the homeowners attention and he said the same thing happened when another room in the house was painted and he showed me some other spots that still had bubbles in it from previous painting. Does anyone know what causes this, was primer not used when the house was built? I’m not looking coward to going back tomorrow and painting the room.
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Old 04-15-2019, 06:52 PM   #2
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Re: Paint Bubbling Up


Contamination or incompatibility of some sort.

Gonna have to prime the whole job with 1-2 coats of BIN Shellac based primer or Cover Stain oil based primer.

Only way to get out of there.

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Old 04-15-2019, 07:05 PM   #3
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Re: Paint Bubbling Up


I guess I’ll try painting one wall and see what happens first
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Old 04-15-2019, 07:29 PM   #4
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Re: Paint Bubbling Up


Just had this issue with a water damaged wall. The paper of the drywall separated from the gypsum when it got wet from the new mud being applied over it to skim it. I ended up ripping the paper off where it bubbled and then using hot mud to repair the bubble.

Sno says he cuts the bubble down the center and pushes mud under the bubble and then knifes it flat and skims over it. I tried that with one of the bubbles I had and it worked. It was more of a pain to do than just rip off the paper.
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Old 04-15-2019, 07:33 PM   #5
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Re: Paint Bubbling Up


It could also be the drywall paper separating and bubbling, I didn’t mess with it today figured I’d let it all dry out.
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Old 04-15-2019, 07:35 PM   #6
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Re: Paint Bubbling Up


If it is the paper I’ll try that thanks
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Old 04-16-2019, 05:37 AM   #7
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Re: Paint Bubbling Up


Bubbling under the sparkle is a [email protected] situation.
If I thought it was going to be an extensive issue and did not want to fix each bubble that might occur then I would prime the whole wall / walls with SW shellac primer. Nasty stuff. I think someone else here has said BIN which I don't use.
These primers will create a barrier that you can then paint over without the paint penetrating into the layers underneath creating the bubbles. Good luck.
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Old 04-16-2019, 07:32 AM   #8
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Re: Paint Bubbling Up


It could be wall paper paste residue...any good oil primer will fix that if that's what it is.
I always prime before paint when removing paper. And I always talk to the paint store personal. So I just had this conversation last week, because I have a few rooms that had paper removed by others. The occupant has breathing issues. I was assured that latex will not work. The moisture re-activates the glue making bubbles. And it may not occur right away. They say it can happen months later.....They did recommend this water based product that goes on clear, it's a wall paper product that I could use...( Sorry I forget the name, but will look into it more next week when I'm ready to start painting.
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Old 04-16-2019, 09:27 AM   #9
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Re: Paint Bubbling Up


The clear product is Gardz.
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Old 04-16-2019, 09:33 AM   #10
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Re: Paint Bubbling Up


You can also have bubbling due to a poor PVA primer on new drywall. You can peel the paint off pretty easily.

The first thing to do here is figure out what is separating from what and why. Peel a bubble off and see what you have.
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Old 04-16-2019, 09:37 AM   #11
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Re: Paint Bubbling Up


Quote:
Originally Posted by Leo G View Post
Just had this issue with a water damaged wall. The paper of the drywall separated from the gypsum when it got wet from the new mud being applied over it to skim it. I ended up ripping the paper off where it bubbled and then using hot mud to repair the bubble.

Sno says he cuts the bubble down the center and pushes mud under the bubble and then knifes it flat and skims over it. I tried that with one of the bubbles I had and it worked. It was more of a pain to do than just rip off the paper.

A lot of times you can glue bubbles down using a wall paper paste syringe. Just inject into the bubble.
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Old 04-16-2019, 10:18 AM   #12
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Re: Paint Bubbling Up


Checked it today it’s the paint coming off the drywall. The paper is fine. I removed the bubbles and re spackled the areas. So far when painting the walls I’m not having an issue.
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Old 04-16-2019, 10:27 AM   #13
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Re: Paint Bubbling Up


Poor primer, or the drywall didn't get cleaned well enough before painting, or both.
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Old 04-16-2019, 10:33 AM   #14
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Re: Paint Bubbling Up


That’s what I’m thinking, hopefully some isolated spots that were dusty when originally primed/painted

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