
Digital Image
Trends in new home construction can be problematic. Specifically and especially those danged rounded corners and bull-nosed arches. But corners turn inward, too (“inside corner”), and can be equally taxing. In the photo, you can barely see on either side of the sink, that the wall has two obtuse angles (more than 90* but less than 180*).
When you hang wallpaper around a corner, particularly an inside corner, you should always cut the paper so it wraps 1/16″ or so around the corner, then you overlay your next piece on top, butting right into the corner. The reason is because corners are never straight nor plumb, and wrapping wallpaper around them is a sure recipe for getting your paper to twist and wrinkle, or to go out of plumb. So, starting with a fresh strip of paper allows you to adjust the pattern match, and to make sure the next series of strips are hanging true-to-plumb.
These obtuse corners lend a different kind of challenge. If you wrap around them, you can pretty well expect your paper to go crooked, and even to get wrinkly. And when the paper dries, it can shrink and pull away from the wall, leaving pockets of air in areas.
But … if you cut the paper in the corner and overlap, like you do in 90* angled corners, you will lose some of your pattern to the overlap, and also have a visible ridge running the full height of the wall, where the new strip of wallpaper overlaps the first strip. This isn’t always all that noticeable, but on some papers, and with some lighting conditions, I can be very noticeable.
My solution in this case was to wrap the paper around the inside, obtuse corner. The amount of wrap on each side was about 1.5″ The question was, would that new edge be straight, plumb, and would it butt up nicely to the subsequent strip? Would it shrink and leave gaps in the seams?
I was lucky, because the edges of the wrapped wallpaper lay fairly straight and plumb. I was also lucky that the wallpaper I was hanging was thin and malleable, and let me work it to the left to butt up against the first strip, or to the right without too much distortion to its opposite edge. I have to say, I was pretty amazed when subsequent strips on either side of the original strip butted up nicely and without too much persuasion.
One minor thing that did happen is, as the paper dried and released moisture from the paste, it shrank a little. This could lead to gapping at the seams. But, because I had put less paste on the edges of the strips than in the center area, the edges dried faster and “locked down” the wallpaper, firmly holding the edges where I had put them.
The other thing that happened as a result of this shrinking, is that a very few sections of the wallpaper exactly in the center of the corner pulled away from the surface below, leaving a sort of air pocket. You don’t want to bump into one, because it could break the surface and leave a hole. These are few, small, and easy to miss, and, to be honest, the chances of poking a hole in one is pretty darned negligible.