One. What are the causes of wallpaper discoloration?
1、Excessive moisture on the wall surface
After applying the base membrane, the wall surface has a high moisture content, and moisture can also penetrate outwards. This penetrating moisture forms numerous capillary-like pores, allowing the alkalinity of the wall to penetrate through these pores and corrode the wall fabric.
2、During construction, the adhesive may spill out.
During construction, if the application is not performed correctly, leading to glue overflow, washing may also cause discoloration of the wall covering.
3. High alkalinity of the wall surface due to poor wall treatment.
When applying the membrane too thinly, it cannot effectively protect the substrate or prevent alkaline chemicals from the wall from penetrating and causing discoloration of the fabric.
4、The selected adhesive is substandard.
Many adhesives available on the market are either alkaline or slightly acidic, and these products can corrode wall fabrics. Over time, this can cause the fabrics to yellow, affecting their lifespan and usability.
5、Incorrect construction method
When applying wallpaper, excessive force may be applied, potentially causing the waterproof layer on the wallpaper surface to detach at the seams, leading to discoloration and whitening.
6、Applying wall coverings prematurely before the wall surface has fully dried.
If wallpaper is applied to the wall before the protective film has fully dried, the pressure exerted during wallpaper application can cause moisture and adhesive to penetrate the wall, integrating the wall, the wall surface, and the protective film with the wallpaper. This results in direct contact between the wallpaper and the wall, rendering the protective film ineffective.
Two. How to handle wallpaper that has faded.
If the fading is minor or limited to a small area, professional repair services can be utilized.
If the discoloration is severe or covers a large area, it is recommended to replace the wall covering.