Flaking, discolouration, and staining on wallpaper are usually caused by wallpaper paste residue left on the surface during installation. Some wallpapers are more sensitive than others, and excess paste that isnβt wiped off can cause irreversible damage. This issue is most commonly seen near the seams, where excess adhesive seeps out as the wallpaper is smoothed into place.
Common Causes:
πΉ Wallpaper paste left on the surface β If paste is not wiped off during installation, it can dry and leave stains, a glossy sheen, or a rough texture.
πΉ Moisture or chemical reaction β Some wallpapers, particularly metallics, vinyls, and specialty finishes, can react with paste, leading to flaking or discolouration.
πΉ Over-rubbing when cleaning β While paste needs to be wiped away, excessive scrubbing or using the wrong cleaning method can cause damage, especially on delicate wallpapers.
πΉ Absorption into printed or coated finishes β Some wallpapers have coatings that absorb paste, making stains impossible to remove once dried.
πΉ Permanent damage β In many cases, once wallpaper paste has dried on the surface and caused staining or flaking, the damage cannot be fixed and may require replacing the affected panel.
Can it be fixed?
β οΈ In many cases, once wallpaper has flaked, discoloured, or become stained, the damage cannot be reversed.
- For minor paste residue, gently wiping with a clean, damp sponge may reduce the appearance of glossy patches.
- If the wallpaper has absorbed the paste, or if flaking has occurred, there is no way to repair the damage, and replacing the affected panel may be the only option.
How to Prevent This Issue:
β Avoid getting paste on the wallpaper surface β Apply paste carefully and evenly to prevent excess from squeezing out.
β Wipe off paste immediately β Use a clean, damp sponge or cloth to gently remove any paste before it dries.
β Rinse your sponge frequently β Avoid spreading paste residue by using fresh water as you clean.
β Check under good lighting β Paste residue isnβt always visible at first, so inspect the wallpaper from different angles, especially near the seams.
β Use the correct paste for your wallpaper β Some specialty wallpapers require specific adhesives to prevent staining or chemical reactions.
Final Thoughts
Flaking, staining, and discolouration are often caused by wallpaper paste left on the surface during installation. Once the damage occurs, it is usually permanent, and the affected wallpaper panel may need to be replaced. The best way to avoid this issue is through careful paste application and immediate cleaning during installation.