Hello, may I ask if the bedroom does not scrape the putty directly from the ceiling, will it crack o

No, at least more than 10 years, it depends on whether the top is flat, the gypsum is easy to crack if it is used too much, the putty itself is not cracked and peeled, the wall is leaking, damp, and the alkalinity of the cement exceeds the standard, it is possible.

You can scrape putty directly, which is a very common method. If you want the putty not to crack and peel off, you must pay attention to the construction details:

The construction process of batch putty is as follows:

1. Clean the base layer: the plastering wall, roof, column and plate joints must be carefully cleaned, and there shall be no dust, clay, splashing foam and oil stains. The plastering layer is dry and firm, the hollow drum part has been repaired, and the dust, dirt, splash and mortar flow marks and other debris remaining on the plastering layer are removed and swept away.

2. Scrape the yin and yang angles: When scraping putty, the yin and yang angles are required to be clear and straight. The yang angle is repeatedly extruded by the aluminum alloy rod against the rod; The yin corner is operated with a special tool to make it clear and straight.

3. The thickness of the first putty is controlled at 4-5mm, which is mainly used for leveling, and the construction is carried out in turn parallel to the direction of the wall. It is required that it cannot be left behind, and the end must be closed neatly.

4. Wall polishing: try to use finer sandpaper, generally softer putty (such as 821) with 400-500 sandpaper, hard texture (such as wall lining, easy to quack) with 360-400 is better, if the sandpaper is too coarse, it will leave deep sand marks, and the paint can not be covered. After sanding, the wall must be thoroughly cleaned to avoid too much dust and affect the adhesion of the paint.

The difference between bumps and bumps does not exceed 3 mm.

5. The thickness of the second putty is controlled at 3-4mm, and the second putty must wait for the bottom putty to be completely dry and polished after the construction, parallel to the short side of the room with a large plate for full batch, and at the same time when the putty 6 7 is dry, it must be calendered and trimmed with a rubber scraper to ensure that the surface layer is smooth and clean, the texture is straight, and the color is uniform.

rameters and take cam