Simply paste the wallpaper as usual from the top of the wall to the top of the window, using a putty knife to crease it into the architrave. Then, measure out the reserved half inch, and cut. Next, move to the bottom and repeat the process, again making sure to keep extra paper for the window reveal.

Make a horizontal cut just above the edge of the window reveal. 3. Make a similar cut near the bottom just below the window sill. Then fold the paper around to cover the side of the reveal. 4. Fix and smooth the paper on to the reveal using a smoothing tool or brush. 5. Use a utility knife and a suitable guide to trim off the excess paper.