Note: Before you start, check the manufacturer’s information on your wallpaper for any instructions or recommendations specific to your brand.
1. Use a sharp utility knife and a metal yardstick to cut your first piece of wallpaper.
2. When you measure, add 2 extra inches to the top and bottom of the strip – this will be trimmed off later and will help make sure that you don’t cut the sheet too short by accident. As you go around the room it’s a good idea to re-measure the height of your walls from time to time since shifting in older homes can affect your measurements.
3. If your new wallpaper is pre-glued it will have to be moistened in a wallpaper tray according to the manufacturer’s instructions. If it is not pre-pasted then you will need to apply wallpaper paste to the back with a paste brush.
4. Hang the first piece of wallpaper flush with your chalk line and use a smoothing brush to move any bubbles from the centre of the paper to the edge.
5. Trim the excess paper at the top and bottom so that it is smooth and flush with the edge of the moulding and re-glue the edges as necessary for a good fit.
6. Cut your next piece, again allowing a couple of extra inches at the top and bottom so that you can match the pattern with the previous piece. When it is positioned properly, use a seam roller and seam adhesive to strengthen the edges. Trim and repeat with subsequent pieces.
7. Lightly smooth each piece, roll seams and add adhesive as necessary. Trim tops and bottoms for a straight edge as you go around the room. Stubborn bubbles can be pricked with a pin to release the air and rolled flat.
8. Using a metal ruler and knife, trim the outline of the switch plates, allowing an excess of 1/4” inside the plate area for the plate to cover. Some decorators like to use the trimmed paper to decorate the switch plate itself. If you do this, make sure you apply the paper before putting the plate back on the wall! When it is dry, trim the switch, plug and screw holes, then reattach the plate.
9. Wash off any excess glue and remove masking from woodwork and clean up work area. Clean tools with water and allow paper to dry overnight.