Ok I'm going there so hold on! This being a rental property, would the paint that was used be Behr by chance?

 

I'm not sure. There was a little dust that comes off the back side when I rub it. Here is a pic of the back where it was on the wallboard. You can see the texture of the paper in the paint.

I didn't think to take a picture of the wall before we retaped it.

 

Could be any number of reasons. Poor drywall prep (dust removal) could be one. Another is some sort of moisture getting in behind the drywall. I know, you'll say, "no way, there's no plumbing or roofing issues to speak of", but, it's funny how moisture finds its' way in. Could have been an ice dam on an outside wall, a plumbing leak in some copper pipes, a bathtub or toilet that overflowed..........

I had one a few years back.......went to roll out a wall and pieces came off the wall onto my roller kind of like the pieces in your picture.......did some investigation and found out that a customer's toilet had overflowed a month or so previous......that moisture was enough to pop off the paint ever so slightly and my roller just suctioned it off the wall.

 

And this is why primer is a good thing....

I'd put $ on a blow n go. Straight over new rock. No primer.

Unless I'm missing somethin...

 

It's hard to say, I know there's multiple scenarios. I have been in 3 of the 6 units and this is the only one showing symptoms so far. Some of the rooms are upstairs, some downstairs. Some on unit partition walls others on inner walls. I will test moisture, but I think any moisture issue may be mitigated at this point, there's no visible staining.

I've never had adhesion issues rolling flat over bare drywall, is their more potential of failure spraying a builders flat and not back rolling? Or dust for that matter? Anytime I've rolled over dust, it gets stuck in the roller and makes a mess, is a sprayed finish more vulnerable to dust? I would think the pressure would blow it away.

 

El cheapo primer like pva or such watered down to dusty water, no time for anything to dry, prime texture paint at once, which made a solid mortar like substance hanging on dusty watery solution with little diluted glue remainder that dried out with time, that's why you see dust in the back, adhesive part of the primer no more.

PS: it might of being "primed" with just a diluted drywall mud.

 

yup, just like the other fella said, El cheapo primer.

 

Probably no primer. And who knows if it was back rolled...cheap products and cheap labor= job security for the next guy...

 

Cheap,cheap,cheap! See a pattern here? I have for 32 years.

 

They might have skim coated the patch area with hot mud that was almost ready to set.
Could also be patching plaster not mud. Both products cause these type of problems.

But they dry fast so you can patch and go so to speak.

I read the post right ??? just the old repairs are coming off ??