I don’t know if you have noticed that when decorating the exterior wall, in addition to using white walls and tiles, more paint is used for decoration. We must know that the outer wall is not the inner wall and needs to pass the wind. Blowing the sun, so in the decoration, in addition to the material quality is good, the exterior wall paint construction plan should also be treated with caution, then what should we pay attention to the exterior wall paint construction plan? Let's take a look at the exterior wall paint construction Plan and precautions.
Exterior wall paint construction plan
1. Construction process
(1) The base of the exterior wall painting project should be dry, its water content is ≤10%, and PH≤10. It can be applied under conditions of relative temperature and humidity ≤ 85%. The base layer should not have defects such as cracking, falling powder, sanding, shelling, hollowing, peeling, and lime bursting.
(2) Professional exterior wall putty; full of putty putty once, leveling putty again, base layer sandpaper smoothing, curing for more than 7 days to moisture content, alkaline standard, choose paint to choose Bang Yun paint.
(3) The base of the painting project must be clean and free from dust, oil, splashing and other contaminants. If any of the above deposits are found, remove them with a blade, wire brush, sandpaper, detergent, etc., then rinse them off with high-pressure water, and dry them before painting. Construction should be carried out as soon as possible after wall treatment to avoid re-contamination.
(4) The base of the paint project shall not have efflorescence hair. If the base appears to have efflorescence, it should be washed with 5% aqueous solution of oxalic acid and then rinsed with water.
(5) Primer construction, when using roller coating, use a short-haired roller, remove the loose bristles before use and infiltrate with solvent. When applying, it should be covered with a uniform, parallel, wet coating. The same side should be finished once. Rollers should avoid excessive paint when rolling, and use a uniform plate to avoid sagging. The paint film is allowed to dry before it can be painted to the next layer.
(6) Topcoat construction, first apply the first coat with a normal roller at a thickness of no more than 100 micron wet film, and then apply the second coat with a pattern roller. When using roller coating, first use the pattern roller, remove the loose bristles before use, and infiltrate with water and a small amount of detergent. Wash and dry when using. Uniform, co-directional, parallel wet coating should be used for finishing. The same side should be finished once. When rolling, the roller should avoid sticking too much paint, and the paint film should be dried before it can be painted.
2, the process of the wall surface treatment → full putty putty → leveling putty once → base sandpaper polishing → brush primer → brush elastic topcoat twice → partial repair
(1) Base treatment and full putty
1) After the personnel enter the scene, use the blade, sandpaper, etc. to clean and repair the dust, floating sand, bumps, shelters, and pile marks on the base layer. For example, the small cracks generated by the non-empty drum on the wall surface, that is, the repair glue is used. Incorporate the solidity, and at the same time do the pollution prevention and protection work of related facilities.
2) Use putty to add water and stir evenly to adjust to the proper construction viscosity, then scrape the scrape. The scraper is scraped with a special scraper or paint knife until the base layer is flat. The mixed putty can be used for 2 hours at 25 ° C, and it will be solidified and scrapped over time, and the surface is dried at 60 min / 25 ° C. The time between scraping and putting the putty should be at least 12 hours. Before the primer is applied, it should be cured for 5-7 days. After reaching the best strength, sanding is smoothed with sandpaper.
3) Quality requirements: smooth, smooth, no oil, no cracks, no voids, no blisters, flat and straight.
(2) The primer is made of alkali-resistant sealing primer, which does not need to be diluted during construction. When the construction is not easy, it can be added with 1%--5% of water. The construction process can be carried out by rolling, spraying and brushing. No leaking brush, no accumulation, coating surface dry 30min (25 ° C), solid dry 24h (25 ° C), undercoating time interval ≥ 12h. Choose the paint to choose the state paint.
(3) Brushing two exterior wall paints should not be diluted with water under normal conditions. When the construction is not easy, it can be diluted with 2%-4% water, and fully stirred evenly, but do not stir at high speed. Before painting, the base surface is required to be flat, smooth, and the lines are straight, and then the topcoat is brushed. When brushing: Requires uniform brushing, no leakage, no accumulation, no bottoming. The coated surface was dried for 50 min (25 ° C), dried for 48 h (25 ° C), and the undercoating interval was 24 h. After 10 days of maintenance, the film was completely formed and reached its optimum state.
External wall paint construction precautions
1, hot weather in summer, two hours before the construction of putty, the wall needs to be moistened with water. After each batch of putty is dried, it needs to be cleaned with water.
2. The primer and topcoat should be evenly mixed before use. If you are stirring indoors or in a roof, you should put a plastic sheet or newspaper under the bucket to ensure the floor is clean. Before the material is activated, the container cover must be cleaned first to prevent mixing of debris.
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3. The construction equipment should be cleaned to avoid impurities, and the equipment should be cleaned in time. Construction personnel should be equipped with protective masks when spraying.
4. The materials are composed of two components. The proportions must be accurately separated according to the instructions or the gauges to prevent quality problems due to improper proportions.
5. The distance between the scaffolding and the hanging basket should be appropriate. The standard distance is 40-50cm. If it is too close, the scaffolding will be unevenly connected. On the contrary, if it is too far, the painting technique can not be implemented as expected.
6, protection work. Stick as much as possible to the protective material, and stick it tightly. If it is applied to a part that should not be painted, wipe it off immediately.
7. Before the formal construction, it must be tested on other boards. After confirming the coating effect, it will be officially painted.
8, correctly separate the interval between the various processes, otherwise it will cause the coating film adhesion is not strong or peeling, bulging, peeling.
9. Before the process is handed over and unloaded or moved to the basket, all parts must be carefully inspected and repaired if necessary.
When the exterior wall is being renovated, it can't be careless. Only when it is reasonably renovated, can it be better to carry out the decoration work, in order to withstand the wind and rain, in addition, the paint material of the outer wall can not be careless, and the quality is important. . The above is the external wall paint construction plan and precautions that Xiaobian introduced to you today. It is over here. For more information, please continue to pay attention to the decoration home network.
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External wall paint construction process exterior wall paint construction precautions
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