Wallpaper removal is a messy job no matter how you do it, but if you want to get rid of old wallpaper, you really have no choice except to strip it. While it may be a bit of a hassle, it's well worth the effort when the result is a fresh new wall to decorate.
Stripping the paper off the walls is probably the toughest part of the job but the most important part is dissolving the paste. After the paper is gone the paste will be left behind, causing new paint finishes to crack and even new wallpaper to peel. To be successful you need to dissolve and get rid of all the paste, for this we recommend Savogran® stripping solution. Not all liquid strippers will dissolve the paste so it can be washed off the walls, but this one does a good job with these least effort.
Before beginning to remove wallpaper it's important to consider the type of paper you're dealing with. For instance, vinyl wallpaper will be impervious to liquid stripper, so the vinyl topcoat will have to be removed before attempting to wet it. Fortunately, it is usually easy to pull the vinyl cover off.
To determine if you're dealing with vinyl, try peeling it off the wall using a joint knife to lift the edge. If the surface coating comes away from the wall in a sheet, it's vinyl. Thick vinyl will come off in full sheets and paste will usually be all that is left on the wall. With some other types of vinyl a backing sheet may remain on the walls as well as the paste underneath. Thinner vinyl will tear randomly as you pull the coating off and will almost always leave a backing paper on the walls.
If you're dealing with thin, vinyl that tears as you pull it, pull off as much as you can before it tears and then use the knife to lift a new edge and start again. Continue until you have removed all the vinyl and the backing paper and glue are all that remain on the wall. Because the backing paper is porous, it will quickly soak up the liquid stripper and aid in saturating the paste underneath.
"Paper-wallpaper" is another type that may be encountered, especially in older houses. Older wallpaper like this is usually easy to strip because it will absorb the liquid quickly and scrape off the wall will little effort. Grass cloth is another type that will absorb liquid quickly and be fairly easy to remove.
Some paper-wallpapers found in newer houses are very thin with a slick finish similar to vinyl, but the surface will not peel off. If you're dealing with one of these, it may be over unpainted drywall. This will be a problem if you try to use a lot of water to remove it.
Check to see if the wall surface under the paper has a coat of paint, or wallpaper sizing which will have a blueish hazy finish. If so then it will be safe to use water to remove it. Use a scoring tool like this to break the surface and allow it to absorb more stripper.
If there is no coating on the drywall, you will certainly damage it no matter what method you used to remove the paper. The best that can be done in these situations is to cover it with paint or new drywall. These papers can usually be painted successfully if a good oil-based primer is used first to seal it. Following the sealer with a finish coat of alkyd-base finish paint will insure that it doesn't pucker and that the paint job will last. Don't use a water-based paint like latex for this unless you apply a couple of coats of oil paint first.
Begin the process by mixing the liquid stripper with warm, to hot water in a compression sprayer. To prevent foaming, add the water first and then add the appropriate amount of stripper. Put the pump on the sprayer and pump up the pressure.
Cover floors with a cotton drop cloth to soak up run-off from the sprayer. Some floors may be stained by the remover liquid, test a hidden spot on wood floors for damage before continuing. If the floor is affected by the stripper, tape 1 mil or thicker plastic to the baseboard and cover with the drop cloth to keep water and stripper off the floor.
Spray a 4 foot swath of the wall, soaking it completely from ceiling to floor with a fine spray. Wait 5 minutes and spray the same space again. Move to the next 4 foot swath of wall space and soak it in the same way. Go back to the first swath and spray it a third time then spray the second section again. Wait a few minutes and go back to the beginning.
Try to peel up an edge of the paper with a joint knife, if it comes free from the wall easily, it's ready to be stripped. Spray it again to keep it wet and then spray the second section again before beginning to remove the softened paper. If the wallpaper doesn't come away easily, spray the wall again and keep spraying it until it's soft enough to come off.
When you get to this point, slide the blade of a wide joint knife under the wet paper and skim it off the wall. Deposit it into a trash bag immediately to avoid creating a mess that you will have to clean up later.
After removing the paper from the first section begin the softening process on a third and fourth 4 foot swath of wall space. Keep each section wet by soaking it every few minutes. Move around the room spraying a few sections ahead as you work. Let the stripper do the work. The more you spray, the easier the paper will be to remove. Spray as many times as needed to make it soft and easy to remove with the joint knife.
NOTE: If you are dealing with plaster, all this spraying will have no real effect on the wall surface. If however, you are working with a drywall surface, particularly un-painted drywall, you will want to be careful with the joint knife when removing the paper. To avoid tearing the drywall use gentle pressure and don't force wallpaper that's not ready to come free. Also be aware of how much stripping liquid has penetrated the surface. Don't let the drywall become soaked as this will cause it to ripple and pucker. See Repairing Torn Drywall for help with this type of damage.
When the paper has all been removed, go back to the starting point and spray the paste in the same manner. Soak a few sections of wall space at a time and spray the glue repeatedly before attempting to remove it. When you're ready use a soft scrub brush, rag and a bucket of warm water to wash the dissolved paste off the wall. Start at the ceiling and scrub a small area at a time, use a circular motion with the wet brush to loosen the glue.
Saturate the rag with clean warm water, wring it out and wipe the paste off. Turn the rag to a clean spot and rinse frequently to avoid spreading the paste around. Work from the ceiling down so the water runs off the cleaned wall. Refresh the rinse water frequently as it becomes saturated with paste.
When you have the paste off the walls, wash the baseboards and floor with clean water and let them dry. Let the walls dry for a day or so before doing repairs and decorating.