Sometimes, you want to wallpaper more than one wall such that you will continue wallpapering from one wall to one of the neighboring walls. In that case, you need to apply your wallpaper around the corner the two walls share. Having the wallpaper design continue from one wall to the other.
With only one more strip to finish off the first wall, you want to shorten the width of this strip by cutting it into two parts along its length. The new width of the strip should be 2-3 cm wider than the distance from the edge of the previous strip to the corner. The best way to do this is to first place the whole strip around the corner of the wall, before you apply any paste to the wall, and press the strip into the corner with a smoothing tool so that it is visibly creased into the wall’s corner. After that, you can use scissors to cut along the strip 2-3 cm next to the fold. Next, you need to apply paste to where the strip will be hung (use a small paintbrush to apply the paste in the corner), and hang the strip onto the wall and around the corner. As with any other strip, smooth away any bubbles or ripples to the edges of the strip. In this case, in the direction away from the wall’s corner. If necessary, you can make a small incision through the strip at the corner to allow air to escape better and smooth out any problematic ripples.
To finish off you just need to hang the remaining part of the last strip and apply it next to the part you just finished. As always, you want to hang the strips edge to edge. It is more important to make sure the strip you are about to apply is hung straight because if the corner the two walls share is tilted a bit, rather than straight, it will cause the design on the second wall to be tilted as well. Use a spirit level and a straightedge to make a straight, penciled line where the next strip should end. Hanging this strip straight means the strip may end up slightly overlapping the corner strip in some part along its length, while in the rest the strips will be applied edge to edge as usual.
As with an inside corner, you want to cut the last strip into two parts along its length. Its new width should be 2-3 cm wider than the distance from the edge of the previous strip to the corner. You can place the full strip on the wall and around the outside corner before applying any paste to the wall, pressing the strip around the corner, such that it gets visibly folded along its entire length. Then, you can use scissors to cut the strip into two parts, cutting 2-3 cm away from the fold. Now, you can apply some paste to where the strip will be hung and hang it onto the wall, wrapping it around the outside corner as you press on it. As usual, use the smoothing tool to push out any bubbles to the edges of the strip, moving it in either direction away from the wall’s corner.
Moving on, you will apply the second part of the last strip next to its first part (that you have just applied). As with any first strip on a new wall, you need to make sure it is hung straight. Use a spirit level and a straightedge to make a straight, penciled line where this strip should end. The reason for this is the previous strip may not be straight if the wall’s corner is not. This means the next strip, which will be hung straight, may end up slightly overlapping the corner strip in some part along its length while in the rest, the strips will be applied edge to edge, as usual.