Then size the walls by applying a some ready mixed paste diluted with water to stop the plaster absorbing all the moisture when you come to actually hang the paper.
Hanging wallpaper on plaster walls.
Take down pictures mirrors or anything that s leaning or hanging against your walls.
Place these in another room.
Place any large pieces of furniture such as sofas in the center.
If you encounter wallpaper that s been painted over first try the wallpaper stripping.
Remove as much furniture as possible from the room.
The best option mostly depends on the weight of the picture in question.
If you manage to get the wallpaper off and the plaster hangs together consider yourself lucky.
Step 1strip off the outer face of the wallpaper leaving only the backing material and glue.
For speed even application i use a roller.
Prepping plaster walls for paint wallpaper painted over wallpaper.
Firstly make sure plaster is fully dry 7 10 days depending on drying conditions.
Although this may sound like a measurement process it actually refers to treating plaster walls with a product that allows the paper to stick better but not so tightly that you can never remove it.
Best o luck paul.
Sizing is a compound of chemicals that acts as a buffer between the wallpaper backing and the plaster surface.
How to wallpaper or paint directly on plaster 1.
Pull out all remaining plaster and lath and re build the walls with drywall or to be historically accurate plaster and lath.