Preparing the wall surface
The surface should be dry, smooth, hard, clean and absorbent. Extra-absorbent walls must be coated with a suitable primer.
Pasting, folding together, steeping
Depending on the type of wallpaper, you should use either crystal (powder) paste or pva based ready mixed.
Paste the strips of wallpaper evenly, fold together 2/3 : 1/3 and then roll up. Make sure that all strips are left long enough for the paste to soak in evenly, as specified in the roll insert.
This is important for the perfect adhesion of the wallpaper to the wall.
Always start with the light, i.e. at the window. The first strip should always be plumbed vertically with a spirit level or plumb line so that the following strips are perpendicular.
The strips of wallpaper should be hung with a slight overlap at the ceiling to compensate any differences in height.
Press the strips onto the wall with a soft wallpapering tool (spatula) or sponge roller from the centre to the sides to remove any bubbles. You may have to paste the edges beforehand.
Dab off paste stains with a moist sponge or cloth immediately.
Always wallpaper up to a door from one side, never from both sides. The wallpaper strips are split on a level with the horizontal upper edge of the door frame. The wallpaper is pressed against the vertical outer edge of the door frame and the overlap cut off. The overlap above the door frame is stuck in place and the bottom overlap also cut off.
Radiators should be removed to allow for a more professional finish. This can be easier than trying to paper around the radiator and brackets, particularly if the radiator is hot.
Wide strips of wallpaper should never be pasted over or around corners. The maximum overlap should only be around 1-2 cm and nicked several times. The remaining strip is realigned on the new wall and started anew.
Sockets and light switches
Before working on sockets or light switches make sure that the electricity is turned off at the fuse box (Either the mains switch or the correspondingly numbered individual fuse for the room. Always use an insulated screwdriver, or even better a voltage tester. A voltage tester can also be used to safely check whether the electricity has in fact been turned off.
First remove the surrounds from switches and sockets so that you can paper beneath the surrounds.
The lengths of wallpaper are simply hung over the socket or light switch (without paying any attention to their position). First press the earth contacts of sockets through the wallpaper by hand. For light switches, nick the wallpaper in the form of a cross.
Once the paste has dried, use a universal cutter to expose the switch or socket element. The exposed area should not be larger than the metal frame so that the surround completely covers the cutout.
Finally, simply replace the surrounds. This produces optically seamless wallpaper at these points.