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Stubborn adhesives, multiple layers, and drywall damage can complicate removal.

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.

Many peel-and-stick wallpapers aren’t moisture-resistant, so if you install them in high-humidity rooms, mold can grow behind the wallpaper. It’s best to reserve peel-and-stick wallpaper for bedrooms, living rooms, and other rooms with lower humidity levels. Not only does this minimize the risk of mold growth, but it also keeps the wallpaper from bubbling or peeling.

Using a fabric softener solution is a popular and low-cost DIY method for removing wallpaper, but its effectiveness is limited. While it may work on some types of wallpaper, it is unlikely to be successful on vintage styles, and there is no evidence that it is more effective than other removal methods. There are also several potential downsides: the solution can leave behind a residue that may damage your walls or interfere with the adhesion of new wallpaper. Additionally, this method can create a strong, overpowering aroma that takes a long time to dissipate, making it a poor choice for homeowners sensitive to smells.