Second-hand house decoration paving wallpapers need to pay attention to the problem

When dealing with a second-hand house, it's common to find walls that are already wallpapered and in need of renovation. Before applying new wallpaper, the surface must be sanded to prepare the base film for proper adhesion. Ideally, the wall should be smooth, dry, and evenly colored. For cement or brick walls, which are generally flat, a layer of putty can be applied to level the surface, followed by a thin coat of varnish before installing the wallpaper. However, for gypsum board, plywood, or blockboard, seams must be properly sealed first. This can be done by mixing white glue with water (vinyl acetate resin) and then combining it with plaster to ensure the joints are strong and crack-free. When using putty, adding a small amount of white glue will make it easier to sand and improve the overall finish.

There are two main types of walls you might encounter: powder walls and smooth walls. Powder walls are those that have a weak, powdery surface. These need to be sanded down, leveled, and then primed before applying the base film. On the other hand, smooth walls are very slick and do not absorb adhesive well. They tend to remain damp for longer periods, which can cause the wallpaper to peel off over time. Therefore, it's essential to sand these surfaces before applying any wallpaper to ensure better adhesion.

The base film serves an important role in the process. It helps cure and protect the putty layer while also enhancing the wall’s resistance to moisture and mold. However, it’s crucial to wait until the putty is completely dry before applying the base film. The base film is a fast-drying product that acts as a substitute for traditional varnishes. It helps seal and protect the surface of the putty, improving its waterproofing, mildew resistance, and alkali resistance. This step should only be done after the putty has fully dried.

When working on a second-hand home, there are additional considerations beyond the basics. One key point is that wallpaper should never be applied by immersing it in water. Instead, the wall should be thoroughly brushed before starting the installation. This ensures the surface is clean, dry, and ready to hold the wallpaper effectively.

Overall, preparing the walls correctly is vital for a long-lasting and professional-looking wallpaper finish. Whether you're dealing with old paint, uneven surfaces, or different types of wall materials, taking the time to properly sand, prime, and prepare the area will save you from future issues and ensure your new wallpaper looks great for years to come.