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Connecting an existing wall to a new wall; existing wall has wallpaper

Posted on 6/3/25 at 9:04 am
Posted by jlovel7
Louisiana
Member since Aug 2014
22840 posts
Posted on 6/3/25 at 9:04 am
Don't want to disturb the wallpaper as we actually like it. I am "T"-ing off a a new wall to block off the stair and make the room more intimate. It'll be our reading/record listening room with a nice fireplace. Obviously with a normal wall I would do some tape/compound and sand and paint and call it a day. But I can't do that cleanly overtop of the wallpaper on the existing wall.

Any suggestions on how I can connect a new wall to an existing wall and get a clean joint without disturbing existing wallpaper?
Posted by cgrand
HAMMOND
Member since Oct 2009
43677 posts
Posted on 6/3/25 at 10:35 am to
trim it out with something
Posted by T-Jon
Member since Jan 2012
43 posts
Posted on 6/3/25 at 10:59 am to
Corner trim? Or ship lap the new wall
This post was edited on 6/3/25 at 11:00 am
Posted by modes
Member since May 2017
273 posts
Posted on 6/3/25 at 11:17 am to
If going with sheetrock, put a J-mold trim at the intersection and float the sheetrock up to the trim. Then caulk the joint prior to painting the sheetrock.

Wood trim may be better, depending on the end look you want.
Posted by jmon
Loisiana
Member since Oct 2010
9332 posts
Posted on 6/3/25 at 12:18 pm to
What material is the new wall comprised of?

If sheet rock, butt the rock as tight as possible, to the existing wall and caulk. Should cover any deviations unless existing wall is not plumb.

If some type panel, wood, then trim out where walls meet, with a very small quarter round.

Posted by jlovel7
Louisiana
Member since Aug 2014
22840 posts
Posted on 6/3/25 at 12:26 pm to
quote:

What material is the new wall comprised of? If sheet rock, butt the rock as tight as possible, to the existing wall and caulk. Should cover any deviations unless existing wall is not plumb. If some type panel, wood, then trim out where walls meet, with a very small quarter round.


Just wood stud with gyp board over it.
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