[HELP] Very Old Adhesive On Unprimed Drywall
#1

Hello everyone,
I am looking into redoing my half-bath. I have put off the project since my wife and I moved into our house about a year and a half ago. Not long ago, I was stripping the wallpaper off, when I came to some washable(?) boards that lined the walls surrounding vanity counter. I popped these off and revealed some very old adhesive. I've tried to peel it off by hand, but it is nearly impossible. I've tried sanding it, spic-n-span, and wallpaper remover and nothing will get it off. The problem is, the adhesive is on (what appears to be) unprimed drywall. The drywall is chalky to the touch, so that is what I would assume it is.
Any help for what to do in my situation would be appreciated.
I have provided pictures to show what I am up against.
Thanks.

I am looking into redoing my half-bath. I have put off the project since my wife and I moved into our house about a year and a half ago. Not long ago, I was stripping the wallpaper off, when I came to some washable(?) boards that lined the walls surrounding vanity counter. I popped these off and revealed some very old adhesive. I've tried to peel it off by hand, but it is nearly impossible. I've tried sanding it, spic-n-span, and wallpaper remover and nothing will get it off. The problem is, the adhesive is on (what appears to be) unprimed drywall. The drywall is chalky to the touch, so that is what I would assume it is.
Any help for what to do in my situation would be appreciated.
I have provided pictures to show what I am up against.
Thanks.


#2
Forum Topic Moderator
I'd scuff sand the wall with 80 or 100 grit and then apply a coat of either Zinnser's Gardz or oil base primer. Once the primer is dry, scuff sand and apply a skim coat of joint compound. Once the drywall work is done, remove the sanding dust and it's ready for primer/paint.
#3
Thanks. I'm assuming that initial scuff sand will not remove much of the adhesive. Is that ok? It looks like I'm just supposed to cover up most the adhesive with the primer and compound, right?
#4
Forum Topic Moderator
Yes, you only scuff sand to insure anything that isn't bonded well is removed. The primer seals the damaged drywall so the moisture in j/c or latex primer or paint won't cause additional damage.
#5
Sure looks like you pulled all the drywall paper off on the back wall. If that is the case the "chalky" texture is the raw gypsum and that section needs to be replaced. The other walls look to be in salvageable shape and will require a skim coat of joint compound to smooth out. Old wallpaper paste is finicky, sometimes all you need to do is wet it and it re-hydrates and other times it is hard as rock and will not budge.
#6
Forum Topic Moderator
It looks to me like there is only exposed gypsum in spots. While replacement might be best, I'd likely prime and skim coat as it's a lot less work 
I think wallpaper removal is one of the most detested jobs out there. Sometimes you get lucky and it comes off easily but often you have to fight for every inch

I think wallpaper removal is one of the most detested jobs out there. Sometimes you get lucky and it comes off easily but often you have to fight for every inch

#7
Thanks all.
This definitely isn't normal wallpaper paste.
The previous owner had installed these weird "washable" boards on that area and this is what was holding it in place.
I'll try the suggestion out and report back.
This definitely isn't normal wallpaper paste.
The previous owner had installed these weird "washable" boards on that area and this is what was holding it in place.
I'll try the suggestion out and report back.