Reverse alternate lengths when hanging unpatterned wallpaper. For example, paste the top of the first length to the top of the wall, but paste the top of the next length to the bottom. This procedure helps disguise the slight variations in colour that can occur within a roll. When cutting the wallpaper into lengths mark the top of each one for easy reference.
Securing loose wallpaper joints
If part of a butt joint between adjacent lengths of wallpaper does not stick down properly, ease back both edges of the paper from the wall and, with a small brush or cotton swab, paste the wall beneath the joint, using as little paste as possible. Carefully brush the paper back into position, cover it with a sheet of blotting paper and press down the joint with a soft pad of cloth.
Fitting coving- in a wallpapered room
Preferably fit coving- before papering a room. If. However, the room is already papered, first remove the paper on the walls and ceiling which will be covered by the coving. This is because coving cannot be securely stuck to wallpaper.
Polystyrene coving is more frequently used today than plaster coving, but both can be fixed by the same method. Hold a length of the coving in position in the angle of the wall and ceiling and measure how far the top edge projects on to the ceiling. Cut a batten 3mm less than this distance in width and 91 cm 3ft in length. And use it as a straight-edge. Place it against the ceiling, flush into the corner and, working round the room, cut away the paper on the ceiling with a trimming knife.
Repeat this procedure to remove the paper at the top of the wall. Then roughen the exposed plaster surfaces with a stripping knife.
When cutting the coving to fit. Use a fine-toothed saw and cut from the front of the coving to ensure a clean front edge. Use a mitre block to cut the 45 angles for the corners; in the case of polystyrene coving, however. These can be bought pre-cut.
Apply the recommended adhesive to the top and bottom edges of the coving and press the coving into position. If the walls or ceiling are uneven enough to prevent the coving sticking firmly, hammer small nails at 30cm 12in intervals, punching the nail heads below the surface. Scrape away the adhesive that has been squeezed from the edges of the coving and use this surplus to fill any small gaps at the top and bottom of the coving, and the holes left by the sunken nails.