White walls are considered a classic and timeless look and will most likely always be in style. A white wall easily blends into any type of home decor style which makes it a suitable option for most homeowners. Another appealing quality about white walls is that if it's not a color someone is going for, the color is easy to paint over.

No, you don’t always have to remove old wallpaper before applying a new layer. However, you should pull off the existing wallpaper if it’s cracked, peeling, or in poor condition. We’d also recommend against putting wallpaper over textured or dark-colored wallpaper because the old layer may be visible through the new one. In addition, if you try to hang new wallpaper over vinyl-coated wallpaper, the adhesive might not stick properly. 

When installing new steel doors, it’s smart to do other projects simultaneously. This can lower costs, limit mess, and help your home look and function better. For example, replacing a damaged doorframe is wise when planning door installations. 

Also consider changing broken or worn-out locks, repairing or replacing weather stripping, and updating handles. Painting, staining, or upgrading the trim around the door can also improve energy efficiency, security, and aesthetics.

No. If you overlap seams, the wallpaper will not come out flat. In addition to possibly throwing off your pattern match between rolls, overlapping seems necessary. If wallpaper is properly acclimated, and temperature and moisture conditions are optimal during installation, there is no reason to fear shrinkage as it dries.