

Since that strip of wallpaper is 9′ long, we’re losing 4.5 square feet just in this one small area.
(Another reason to always buy a little extra wallpaper … you can’t use every square foot !)
Note that I’ve actually cut my strip to 15.5″, so I’ll have a little excess for trimming at that right wall.

After the right side of the wall was finished, I started moving to the left. When I came to the left corner, my last strip needed to be 1.5″ wide.
Instead of cutting a whole new 9′ long strip off the roll of wallpaper, I reached for that scrap pile and pulled out that narrow 5.5″ piece that had been trimmed off the opposite edge of that strip on the other side of the wall.
This was the correct pattern match to meet up with the strip on the left side of the wall in the photo above.


Now I’m going to get into a little more technical stuff, that usually only a paper hanger will understand. The pattern above is what we call a straight match . This means every strip is the same. And that a particular design motif (like the pink flower) hits the top of the wall at the same position on every strip. My right-left trick above only worked because this was a straight pattern match.
But … you can make it work with a drop pattern match, too. A drop match means that every other strip is the same. On a drop match, the pink flower will be at the top of the wall on one strip, but drop down a few inches (half the length of the pattern repeat ) on the second strip. By the third strip, it will be back up at the top of the wall.
This also leads to using A and B strips. Confusing – but we wallpaper installers get it.
Anyway, my trick explained above works for straight matches, with all A strips. But if your right corner of the wall ends in an A strip, and the left corner needs a B strip, your scrap from the A strip won’t match the pattern repeat needed on the left side of the wall. So you’re gonna have to cut a whole new 9′ long strip, just to cover that 1.5″ gap at the left corner.
But – WAIT! – there is a trick to outsmart this. If you plan ahead, and count your strips, and plot the layout, and engineer your project, you can avoid needing that 9′ long strip.
When you’re cutting off from the bolt that last A strip for the right corner, just cut it a little longer. Cut it long enough to include the B pattern match. Do a little math and then do some visual checking to be sure you’ve got it right. Then cut your strip.
When you get to trimming off the 15.5″ wide right edge, it will be a few inches longer than the previous strips. So you’ll throw away a tiny bit more when you trim at the bottom of the wall than if it were a straight match.
Correspondingly, the 5.5″ wide scrap left over, from which you will cut the 2″ wide strip needed for the left corner, will be a few inches longer at the top of the wall than needed.
So by juggling the A & B pattern match / repeat , you’ve saved a whole 9′ long strip. This is good, because you always want a bit left over, in case of need for repairs down the road.

Houston