Why does liner have to be installed before wallcovering?
Liner may be a plain paper (known in the trade as “blankstock”) that is applied to a wall surface prior to the decorative layer of wallcovering. It also may be a “bridging type” that seeks to provide a new surface when the existing surface has voids. The bridging type is more common, often pure white in color and is often composed of at least 50% synthetic ingredients such as rayon and polyester. Both types act as a buffer between the wall and the second layer of wallpaper. Many wallcoverings are of a delicate nature and can be damaged in the installation process. A layer of liner paper (blankstock) will absorb moisture and adhesive applied to it, easing the installation and lessening the chance of damage from overworking the finish paper. The use of liner, whether it is blankstock or a bridging type, will almost always improve the finished look. note : Bridging liners are effective at hiding small indentations, but cannot disguise even small bumps. They also have little effect on larg
