Coating process: construction process and acceptance standard of exterior wall coating

Core tip: the exterior wall decoration is like putting a protective coat on the house It has a protective effect on the wall At present, there are many materials for the wall decoration, such as paint, ceramic tile, etc today, Jiangsu commander-in-chief Xiaobian introduces the construction process and acceptance standard of the exterior wall paint: Construction preparation of exterior wall coating 1 Base material requirements: the base plastering has been completed and maintained for about 20 days, the pH value of the base is below 9, and the base has been dry (at least 15 days), the humidity is lower than 8%; the base surface is flat, the internal and external corners and corner lines are dense, and the outline is clear; the wall surface is free of water seepage, cracks and air Paint agent, top 10 Chinese wall paint brands Recommended introduction: interior wall paint and exterior wall paint can achieve beautiful, clean and pleasant effects, but the effects in different environments are different, so the color of the paint will be different There are ten brands of Chinese paint, ten brands of global paint, ten brands of Chinese wall paint, and ten brands of Chinese paint, Famous trademark of Chinese paint and coating In private rooms, most of us choose according to our own personality, personal hobbies and living habits The younger generation will choose the interior wall paint with rich colors and bright colors, while the older ones will have some working experience Paint Home News: the exterior wall decoration is like putting a protective coat on the house, which has a protective effect on the wall At present, there are many materials for the wall decoration, such as paint and ceramic tile Today, Jiangsu commander-in-chief Xiaobian introduces the construction process and acceptance criteria of the exterior wall paint: preparation for the construction of the exterior wall paint 1 Base material requirements: the base plastering has been completed and maintained 20 In about days, the pH value of the base course is below 9, and the base course has been dried (at least 15 days), the humidity is lower than 8%; the base course surface is flat, the internal and external corners and corner lines are dense, and the outline is clear; the wall surface is free of structural problems such as water seepage, cracks, hollowing, blistering holes, etc No powdered loose matter, no oil, grease and other adherents 2 The joints reserved on the outer wall have been treated with waterproof and airtight treatment 3 The coating used has factory certificate, and at the same time, it has been tested to meet the requirements of relevant national standards 4 The coating used shall be approved by the owner, and the sample wall shall be approved by the owner, the supervisor and the designer 5 The decorative scaffold has been set up 6 The exposed iron parts of the base course have been provided with corresponding anti rust treatment Construction conditions of exterior wall coating the exterior wall coating has high requirements for construction and maintenance because it is a water-based coating The temperature required for construction and maintenance is higher than 5 ℃ and the ambient humidity is lower than 85% to ensure good film formation Low temperature will cause paint film pulverization, cracking and other problems Environmental humidity makes the paint film not dry for a long time, and eventually leads to poor film formation Weather factors must be considered in the construction of exterior wall Before painting, it does not rain for 12 hours to ensure the base is dry After painting, it cannot rain for 24 hours to prevent the paint film from being damaged by rain External wall coating construction process repair the external wall → cleaning → filling the putty, partially scraping the putty → grinding → pasting glass fiber cloth → scraping the putty and then grinding → primer construction → the first finishing coat construction → the second finishing coat construction external wall coating construction process 1 Repair: before the application, the defects such as the lack of edges and corners and holes of the substrate shall be repaired with 1:3 cement mortar (or polymer cement mortar) 2 Cleaning: dust and powder can be washed with broom, brush and high-pressure water; grease - cleaned with neutral detergent; mortar - removed with shovel and scraper; mold - washed with high-pressure water outdoor, rinsed with clear water and dried 3 Putty filling and partial putty scraping: if the wall is flat and smooth, putty can not be used; in addition to being easy to be approved and polished, putty shall also have good strength and durability When filling and partial putty scraping are required, it is better to apply the putty thinly rather than thickly It is required that putty should have better bond durability and water resistance 4 Grinding: grinding must be carried out after the base course or putty is dry, and wet grinding is not allowed to avoid the influence of adhering sandpaper on operation The thickness of sandpaper should be determined according to the hardness of the ground surface If the sandpaper is coarse, it will produce sand marks, which will affect the final decoration effect of the coating When grinding, first use a coarse abrasive cloth or a grinder, and then use a fine abrasive cloth to polish Pay attention to the flatness of the surface After grinding, remove the dust on the surface immediately to facilitate the construction of the next process 5 Paste fiberglass cloth: use mesh with uniform density, do not use too dense fiberglass cloth for paving 6 Puttying and regrinding: polymer puttying is used for leveling, which is mainly aimed at leveling the irregularities caused by sticking glass fiber cloth and preventing the capillary cracks on the surface 7 Coating application: the water content of the base course surface is required to be no more than 8% for coating application In case of strong wind, rain, fog and other weather, the surface coating shall not be applied; during construction, the sample wall shall be made according to the design requirements until the completion acceptance Acceptance standard for construction of exterior wall coating: the construction of exterior wall coating shall be free from leakage, bottom penetration, powder dropping, peeling, anti alkali, color biting, consistent color requirements, uniform density, sagging, pimple, brush lines and pollution of doors and windows Painting paint for exterior wall decoration is a common decoration method and relatively low decoration cost, so many people will choose paint to decorate the exterior wall Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,