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Wallpapering questions, answered by experts

To determine how many rolls of peel-and-stick wallpaper you need, measure the square footage of the walls you’re covering and divide that by the square footage that each roll covers. Add 10% to 20% of your total square footage to account for pattern matching or damage while installing.

Having dated, peeling, or otherwise damaged wallpaper can decrease the value of your property, so removing that before listing your house is nearly always a good idea; however, since wallpaper tends to be a personal style choice, potential buyers may or may not love your aesthetic as much as you do.

Love the look of wallpaper but want to consider property value as well? Stick with something that is easy to change. If you are thinking of selling soon, make sure your wallpaper hanging is on-point and looks professional with no crooked seams, evenly matched patterns, and minimal bubbling or other imperfections.

Once again, contact with moisture is the culprit here, though water-resistant varieties of wallpaper are less likely to become wet and develop mold. Using a high-quality exhaust fan or dehumidifier and leaving the doors or windows cracked after bathing will keep this issue at bay. 

In most cases, it is not recommended to wallpaper over existing wallpaper, as the success depends on the type of paper already on the wall. While you might be able to cover non-coated wallpaper, you should never apply new wallpaper over a vinyl-coated one, which is more common. Doing so can lead to poor adhesion, resulting in bubbles, imperfections, and peeling. It can also trap moisture, potentially causing hazardous mold growth between the layers.

Even if the existing wallpaper is suitable, experts recommend applying only one new layer. Adding multiple layers (more than two total) can cause significant adhesion problems, leading to warping and bubbling. For the best results, the recommended approach is to remove the old wallpaper and all paste residue before hanging the new paper. If you are unsure about your wallpaper type, consider consulting a professional.

To layer wallpaper over wallpaper, inspect your existing wallpaper for problem areas. Damaged wallpaper should not be covered. If it’s okay to proceed, prep by turning off the electricity and removing any outlet and switch covers. Dust your walls and lightly rinse them to prevent the existing paper from peeling. Apply primer, then apply your new wallpaper.

The Allison, IA homeowners’ guide to wallpaper services

From average costs to expert advice, get all the answers you need to get your job done.