Construction process and acceptance standard of ex

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Construction conditions of exterior wall coating:

because the exterior wall coating is a water-based coating, it has high requirements for construction and maintenance conditions. The construction and maintenance requires the temperature to be higher than 5 ℃ and the environmental humidity to be lower than 85% to ensure good film formation. Low temperature will cause problems such as pulverization and cracking of the paint film, and environmental humidity will cause the paint film to stay dry for a long time, which will eventually lead to poor film formation. Weather factors must be considered in the construction of exterior walls. Before painting, it did not rain for 12 hours to ensure that the base was dry. After painting, it could not rain for 24 hours to avoid the paint film being washed away by rain

construction process of exterior wall coating:

repair exterior wall — Cleaning — Fill putty and partially apply putty — Smooth — Stick glass fiber cloth — Puttying and grinding — Primer construction — Construction of the first coat of finish paint — Construction of the second coat of finish paint

construction process of exterior wall paint:

1. Repair: before application, use 1:3 cement mortar (or polymer cement mortar) to repair the missing edges, corners, holes and other defects of the substrate

2. Cleaning: dust and powder can be washed with broom, brush, high-pressure water, grease - use neutral detergent; Mortar - remove it with shovel, scraper, etc; Mold - wash with high-pressure water outdoors, rinse with clean water and dry

3. Fill putty and locally apply putty: if the wall is flat and smooth, putty may not be used; In addition to being easy to be approved and polished, the putty should also have good strength and durability. It is required that it should be thinly approved rather than thick brushed during filling and local puttying construction. It is required that the putty should have better adhesion, adhesion durability and water resistance

4. Grinding: grinding must be carried out after the base course or putty is dry. Wet grinding is not allowed to prevent adhesion of sandpaper to affect the operation. The thickness of the sandpaper depends on the hardness of the ground surface. If the sandpaper is coarse, it will produce sand marks, which will affect the final decorative effect of the coating. When polishing, first polish with coarse abrasive cloth or grinder, and then polish with fine abrasive cloth. Pay attention to the flatness of the surface. After polishing, remove the dust on the surface immediately to facilitate the construction of the next process

5. Pasting glass fiber cloth: use uniform mesh density, and do not use too dense glass fiber cloth for paving

6. Puttying and regrinding: polymer puttying is used for leveling. The main purpose is to smooth the unevenness caused by sticking glass fiber cloth and prevent capillary cracks on the surface

7. Coating: the moisture content of the surface of the base course shall not be greater than 8% for coating. In case of strong wind, rain, fog and other weather, the surface coating shall not be applied; During construction, it is required to make a sample wall according to the design requirements until the completion acceptance

acceptance criteria for exterior wall coating construction:

the exterior wall coating construction shall be free of missing coating, bottom penetration, powder dropping, peeling, anti alkali, color biting, and the color requirements shall be consistent and uniform. In addition, there shall be no sagging, bumps, brush lines and pollution of doors and windows

painting for exterior wall decoration is a common decoration method, and the decoration cost is relatively low, so many people will choose to decorate the exterior wall with paint. The above is about the construction process and acceptance standards of exterior wall coating, which I hope will be helpful to you




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