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It depends: You can wallpaper over non-coated wallpaper, but you should never wallpaper over vinyl-coated wallpaper. This non-recommended method will cause the new wallpaper to fail to stick, which can lead to bubbling, imperfections, and even mold growth between the layers of wallpaper. Consult a professional wallpaper hanger to determine your existing wallpaper type or remove the current wallpaper and paste residue so that the new wallpaper will adhere properly.

You can reattach peeling peel-and-stick wallpaper using a commercial wallpaper adhesive. Make sure to choose an option that is repositionable and temporary, especially if you are concerned about wall damage. Or, you can remove the peeling panel and replace it with a new roll of the same peel-and-stick wallpaper design.

One of the biggest downsides to peel-and-stick wallpaper is that it doesn’t last quite as long as traditional wallpaper. The life span of peel-and-stick wallpaper is about five years, depending on the quality of the wallpaper and how well you prep the wall before applying. The good news is that, because of its shorter lifespan, peel-and-stick wallpaper is a great choice for people who enjoy switching up their interiors more frequently.

Most experts would not recommend hanging wallpaper over existing wallpaper more than twice. Even if the walls are in good condition and primed well, that third layer of wallpaper could cause problems with adhesion. Unless you like bubbling paint and peeling wallpaper as an interior design choice, it’s better to remove at least one existing layer before adding any more to a wall.