The exterior wall decoration is like a protective coat on the residential bed. It has a protective effect on the wall. At present, there are many materials for wall decoration, such as paints, ceramic tiles, etc. Today, Xiaobian introduces the construction technology of the exterior wall paint. And acceptance criteria:
Exterior wall paint construction preparation:
1. Substrate requirements: The base plaster has been completed and maintained for about 20 days. The alkalinity PH value of the base layer is below 9, while the base layer is dry (at least 15 days have been dried), the humidity is below 8%, and the surface of the base layer is flat. The yin and yang angles and corners are dense and well-defined; the wall surface has no structural problems such as water seepage, cracks, hollow drums and foaming holes. There are no powdered looses and no oil, grease and other adherents.
2. The seam reserved for the outer wall has been sealed with water.
3. The paint used has the certificate of leaving the factory, and at the same time it meets the requirements of relevant national standards.
4. The paint used is approved by the owner, and the model wall is approved by the owner, supervisor and design unit.
5. The decorative scaffolding has been set up.
6. The exposed iron parts of the base layer have been properly treated for rust prevention.
Exterior wall coating construction conditions:
Because the exterior wall paint is a water-based paint, it requires high construction and maintenance conditions. Construction maintenance requires temperatures above 5 ° C and ambient humidity below 85% to ensure good film formation. The low temperature will cause problems such as powder coating cracking of the paint, and the environmental humidity will cause the paint film to not dry for a long time, and eventually lead to poor film formation. The external wall construction must take into account the weather factor. It does not rain for 12 hours before painting, to ensure that the base layer is dry. After painting, it can't rain for 24 hours, and the paint film is not damaged by rain.
Exterior wall coating construction process:
Repairing the exterior wall - cleaning - filling the putty, partial putty - smoothing - plastering fiber cloth - scraping putty and smoothing - primer construction - first coat construction - second coat construction
Exterior wall coating construction process:
1. Repair: Before the application, the defects such as the missing corners of the base and the holes are repaired with 1:3 cement mortar (or polymer cement mortar).
2, cleaning: dust, powder can be washed with a broom, brush, high-pressure water, grease - clean with a neutral detergent; mortar - with a shovel, scraper, etc.; mold - outdoor high-pressure water rinse, rinse with water dry.
3, fill the putty, partial putty: If the wall is smooth and smooth, you can not use putty; the requirements of putty, in addition to easy to batch and easy to polish, should also have good strength and durability, in the filling, local scraping putty construction Requirements, should be thin and not thick brush. It is required that the putty should have better adhesion, bond durability and water resistance.
4. Smoothing: Grinding must be carried out after the base layer or putty is dried. It should not be wet-grinded to avoid the adhesion of sandpaper to affect the operation. The thickness of the sandpaper should be determined according to the hardness of the surface to be ground. When the sandpaper is thick, sand marks will be generated, which will affect the final decorative effect of the coating. When grinding, first grind with a coarse sand cloth or a sander, then sand with a fine sand cloth, pay attention to the smoothness of the surface. Immediately after grinding, the surface dust is removed to facilitate the construction of the next process.
5, attached glass fiber cloth: the mesh density is uniform, do not use too dense glass fiber cloth for paving.
6, the putty and then smoothing: the use of polymer putty scraping flat, the main purpose is to flatten the unevenness caused by the fiberglass cloth, to prevent capillary cracks on the surface.
7. Paint application: The coating surface requires that the moisture content of the surface of the base layer should not exceed 8%. In case of wind, rain, fog, etc., the surface coating should not be applied. During construction, the sample wall should be made according to the design requirements until Until the completion of acceptance.
Exterior wall coating construction acceptance criteria:
The construction of exterior wall coating shall not appear to be leak-coated, through-bottom, powder-dropping, peeling, and no anti-alkali, bite color, and uniform color requirements, uniform density, and no leakage, smashing, brushing, and no pollution of doors and windows.
Exterior wall decoration paint is a relatively common decoration method, but also relatively low cost of decoration, so many people will choose to use paint to decorate the outer wall. The above is about the introduction of the construction technology and acceptance criteria of exterior wall coatings, I hope to help everyone.
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Label: Exterior wall coating construction and acceptance criteria
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