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abelsu 02-22-2007 11:13 AM

Reparing sheetrock
 
We have removed wallpaper from sheetrock, and large sections of the sheetrock paper came with it. We knew this was a problem, but the wallpaper was coming down, and we could not paint over. Basically, we have refloated and that came out better than expected. I have a related question. Should we have primed that torn up sheetrock with anything before floating, and if so, with what?

slickshift 02-22-2007 12:00 PM

Quote:

Originally Posted by abelsu (Post 34339)
Should we have primed that torn up sheetrock with anything before floating, and if so, with what?

Yes

Zinsser's Gardz would have been ideal
That's what it's made for

Rick01 02-22-2007 04:57 PM

I've done hundreds of drywall repairs and floated entire homes (walls and ceilings) without any primer and never had a problem.

Just my experience but I wouldn't worry about it.

AtlanticWBConst. 02-22-2007 05:08 PM

I agree about priming after coating. 'Priming before' also causes the compound to take much longer to dry since it keeps the moisture in the mud.
Even when we do repairs (Water damaged ceilings) we prime after it's patched and coated (aka -'floated'). Priming and stain killing first makes it difficult for the compound to stick to the surface of the area...

joewho 02-22-2007 06:52 PM

Priming for this application is to keep the drywall paper from bubbling up when water based mud is applied. Gardz is really good for that. After wallpaper removal, bubbles are notorious.

slickshift 02-22-2007 07:11 PM

Quote:

Originally Posted by Rick01 (Post 34374)
I've done hundreds of drywall repairs and floated entire homes (walls and ceilings) without any primer and never had a problem.

Just my experience but I wouldn't worry about it.

Quote:

Originally Posted by AtlanticWBConst. (Post 34377)
I agree about priming after coating. 'Priming before' also causes the compound to take much longer to dry since it keeps the moisture in the mud.
Even when we do repairs (Water damaged ceilings) we prime after it's patched and coated (aka -'floated'). Priming and stain killing first makes it difficult for the compound to stick to the surface of the area...

Seriously guys, if this was just a "should I prime before patching" maybe it wouldn't matter, or for a water damage repair or a patch of almost any sort

But this is a wallpaper removal with massive sheetrock "paper" damage/missing

Just slapping the mud on this is just begging for trouble
You might "get away with it" a few times
But I can not recommend it
The chance of failure is too high

Damaged substrate of this nature requires a specific sealer before mudding
Oil-based primer should work OK, but why bother, Gardz is better

AtlanticWBConst. 02-22-2007 07:45 PM

Quote:

Originally Posted by slickshift (Post 34410)
Seriously guys, if this was just a "should I prime before patching" maybe it wouldn't matter, or for a water damage repair or a patch of almost any sort

But this is a wallpaper removal with massive sheetrock "paper" damage/missing

Just slapping the mud on this is just begging for trouble
You might "get away with it" a few times
But I can not recommend it
The chance of failure is too high

Damaged substrate of this nature requires a specific sealer before mudding
Oil-based primer should work OK, but why bother, Gardz is better

Ah...I do see ........

......your point about previously wall papered drywall....with issues.

Sometimes I am very guilty of not reading posts carefully enough...

Yes, I can understand the concept of priming and 'sealing' the surface prior to coating - or as they say 'floating' in some parts of the country... Wallpapered areas with a mess left on the walls can ruin any taping or coating work that is done 'over it'....So, yes i can see your advice regarding the practice of priming 'before'...makes sense now...

abelsu 02-23-2007 09:04 AM

Thanks for all the input. I wish I would have found this forum before undertaking the job, but so far, I think we got lucky. It came out OK, but massive numbers of bubbles and blisters after the first coat or two of mud. None now after priming and painting.

Again, thanks for all the input.

slickshift 02-23-2007 09:41 AM

Thanks for the update
Sounds like its holding OK
The blisters are annoying, but can be dealt with


Thanks for posting up
I'm sure it'll help someone else


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