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In most cases, you cannot wallpaper over existing wallpaper. It’s possible to wallpaper over non-coated wallpaper, but vinyl-coated wallpaper is much more prevalent in homes, so you generally shouldn’t put new wallpaper over existing wallpaper. Adding a layer of wallpaper over vinyl-coated paper will lead to poor adhesion, leaving behind bubbles and imperfections in your wall. Plus, wallpapering over vinyl-coated wallpaper can lead to mold growth, which can be hazardous to your health. It’s usually best to hire a local wallpaper removal service to handle the task to avoid these issues.

Your peel-and-stick wallpaper can fall off for multiple reasons, including high humidity levels, extreme temperature changes, poor installation, and even the wall surface. Textured walls can prevent the adhesive from fully sticking to the wall, making it more likely for the wallpaper to peel off. Low-quality wallpapers with weaker adhesives are also more likely to fall off prematurely.

While some people are confident in their ability to replace concrete by drilling out the broken pieces and replacing them with bagged concrete, it’s possible to run into snags that make hiring a professional worth it. Trying to level concrete slabs can require special equipment, which can be pricey to rent and tough to operate. It's also crucial to contact your town's municipal office to ensure you are allowed to take on the project without a permit.

Deciding between a lighter or darker accent wall depends on the effect you’re going for. Choosing an accent wall in a lighter color will make a room feel brighter and more spacious and complement rooms with less natural light. A darker accent wall will add drama and depth to a room and help make larger rooms feel more cozy and intimate.