While it is possible to paint over wallpaper, it is generally better to remove it first to guarantee a smooth, professional finish. Painting over wallpaper can save time, but it may lead to issues if not done correctly.

You can paint over existing wallpaper if it is in excellent condition: smooth, non-textured, clean, and firmly adhered to the wall. Ensure there are no bumps, tears, or peeling areas, and that all corners and seams are securely glued down. You might also consider painting over wallpaper if removing it would damage the underlying wall. Additionally, some wallpapers are specifically designed to be paintable, which can add texture to a room.

However, there are risks. If the wallpaper is textured, damaged, or peeling, these imperfections will show through the new paint. The moisture from the paint can also loosen the wallpaper's adhesive, causing it to bubble and potentially damage the wall. To mitigate these issues, clean the surface thoroughly and use an oil-based primer to help the paint adhere and prevent the old adhesive from bleeding through.

The average cost to install or hang wallpaper is around $575 per room or project, with typical prices ranging from $200 to $1,500. Costs can be higher for custom or luxury products. Since project size varies, it's often helpful to estimate labor costs per square foot, which generally fall between $1 and $7, with an average of $4 per square foot. The total cost depends on several factors, including the quality and type of wallpaper, the size and type of the room, and whether old wallpaper must be removed first. Opting for less expensive materials like peel-and-stick wallpaper or choosing to do the installation yourself can lower the overall cost. For the most accurate estimate, it is best to have a professional inspect the space and provide a quote.

Hiring a professional wallpaper remover is almost always worthwhile. Although the work is more expensive due to labor costs, doing it yourself is extremely time-consuming, complicated, and easy to make mistakes and wreak havoc on your walls, regardless of the tools you use. Professional wallpaper removers have the tools and experience to get old wallpaper down quickly and without damaging the walls behind it.

Limewash can be removed from brick, but the method of removal will depend on how long the limewash has been on the brick. If the limewash has fully dried—which happens after about five days—you’ll need to use a diluted muriatic acid mixture to remove it. If there are multiple coats of limewash, you may need to apply the acid mixture several times to fully remove it from the brick.