First, the treatment method of the damp wall surface:

The walls of the living room are moist and even moldy. At this time, the anti-seepage liquid can be applied to the wall surface to form a colorless and transparent waterproof film layer on the wall surface, thereby preventing the intrusion of external moisture, keeping the wall surface dry, and then the wall surface can be decorated.

If the wall has been damp, first let the damp wall surface dry for one to two months, then apply a layer of cement-proof water-repellent slurry on the wall to prevent moisture. Next, fill the wall pit with gypsum putty. After drying, sand the wall with sandpaper. Then, the primer can be coated twice with the paint roller on the dry and clean wall surface, or sprayed.

Second, wallpaper wall common wall problems and solutions:

1. Light wall: The wall surface is very smooth, it is not easy to absorb glue, it is not easy to dry, then the force will drop, and sanding is required to paste the wallpaper.

2, powder wall: that is, the wall has a weak powder, should be sanded to remove, leveling, brushing varnish or wallpaper with higher environmental performance, the base film can be pasted after drying.

3, patching putty: put more white glue into the putty to make it firm, not cracking.

4, flat putty: put a small amount of white glue in the putty, in order to sand. Gypsum powder plus white glue instead of batch putty can speed up drying and shorten construction time.