Keep Paste Off Adjoining Wall

Here I’m moving right to left, fixin’ to have my last strip of wallpaper meet up with the first strip I hung (which you see on the left). Because the corners are never perfectly straight, and because wallpaper can stretch when it gets wet with paste , and for other reasons, it’s not possible to pre-trim the width of this last strip, because it won’t be the exact perfect width.
So you cut this strip 1/2″-1″ wider than the gap. That means that it’s going to wrap 1/2″ or so around that corner. So you’ll have to trim off the excess. In this way, you’ll be able to get a custom fit into that corner.
But, you’ll also get paste slopped onto that strip on the left. Some papers you can wipe the paste off easily. But others are more delicate and can be damaged or stained . Why take a chance?

Here is the strip that’s going to fill that gap. I’ve paste it . Next I’ve run a strip of thin blue plastic tape along the edge that will be overlapped onto the existing wallpaper in the corner. This will keep paste from coming in contact with the wall on the left. I also like to place this tape on the top of the strip, to protect the ceiling. Especially important when there is not crown molding and the paste will be bopping into the flat paint on the ceiling (difficult to wipe off).

You can do a Search here to see other posts where I have photos of the trimming taking place, and then removing the excess paper and the blue tape. Here you see the finished corner .
This blue tape is pretty useful. It’s also helpful when double-cutting ( splicing ). Another great feature of this blue tape is that it snaps apart quite easily, so you don’t need a scissors or blade to cut your pieces. It’s imported from Japan. (Those guys have a lot of cool wallpaper tools.)
It can be purchased here https://www.wallpapertoolstore.com/product/blue-cut-tape/
Some people use waxed paper cut into strips, or yellow caution tape, or painter’s plastic cut into strips. But nothing parallels the usefulness and quality of this blue cut tape .

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