The first step is to protect the floor and molding from water damage. Use a pre-taped plastic drop cloth and tape it to the top the baseboard floor molding. Go all around the perimeter of the area and then unfolded it into the room to cover the floor. If you skip this step it can get messy, not to mention the damage that water can do the floors and baseboards.
The second step is to score the wallpaper with a razor scraper or perforating tool. It’s a perfect gadget for removing wallpaper from walls made of wallboard or gypsum drywall because it won’t damage the paper face to the wall board. And that means you won’t have to spend time repairing the walls later. When you score the paper with holes or slits, it allows the moisture, when applied, to break down the adhesive. If at anytime you notice the razor is getting dull, be sure to change it.
The next step is to mix the wallpaper removing solvent with water. The solvent breaks down the adhesive so that the wall covering loosens and can be easily scraped off. Use either a 50/50 combination of vinegar and water or 25/75 solution at liquid laundry softener and water.
The fourth step is to apply the wallpaper solvent with the paint roller or liquid sprayer. Start with a three foot section of wallpaper. After a few applications of moisture and a little time to let it soak in, you’ll be ready for the next step.
Now peel and scrape off the wet paper. Work on a three-foot wide section of a wall at a time and then move on to the next area. As you scrape off the old wallpaper let it fall onto the plastic drop cloth. When all the wallpaper is removed use a sponge and some warm water to remove any excess paste from the wall, then just role at the entire mess – wallpaper, drop cloth and all.