To properly paint over wallpaper, begin by securing any loose corners with wallpaper adhesive and evening out the seams with drywall mud. Once the drywall dries, sand it smooth, wiping away any dust that lingers behind. Cover the entire surface with an oil-based primer to seal the surface. Once the primer dries, apply oil-based paint. Water-based primer and paint can reactivate the wallpaper glue and cause the wallpaper to start peeling off. Oil-based primer and paint help seal wallpaper adhesive.Continue Reading
If your wallpaper is in good condition, paint over it than remove it, as removing it can cause damage to the walls, especially if it has been on the walls for a long time. If the wallpaper you are painting over is exceptionally textured, apply a thin coat of joint compound to smooth out the surface and prevent any traces of the texture from showing through the paint.
When you are ready to paint, begin by using a brush to apply paint to the edges of the wallpapered surface, moving from corner to corner. Using a roller, paint from the ceiling down to the floor. For every 3-foot by 3-foot section, form a "W" shape and color it in fully by moving the roller back and forth over the area. You should apply two full coats of paint, allowing the first coat to fully dry before applying the second.Learn more about Home Maintenance