Common knowledge of coating: eight steps of applying emulsion paint in roughcast room

Core tip: Wall "this kind of thing, everyone and every day will see that if the wall is not well done, it will not only have an impact on the overall environment of the home, but also make the mood of the residents very bad Strictly speaking, the wall decoration includes two parts: "decoration" and "decoration" The basic treatment can be regarded as "decoration" (strong foundation, long-term benefit from one-time construction), painting and wallpaper can be regarded as "decoration" (decoration) Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Paint Home News: Wall "this kind of thing, everyone, every day will see, if the wall is not well done, not only will have an impact on the overall environment of the home, but also make the mood of the residents become very bad Strictly speaking, the wall decoration includes "decoration" and "decoration" The basic treatment can be regarded as "decoration" (strong foundation, long-term benefit from one-time construction), and painting and wallpaper can be regarded as "decoration" (strong decoration, regular replacement) "Rough room brush emulsion paint" is a typical case I divided the construction process into eight steps, hoping to help you master some principles and essentials Step 1: major inspection Comprehensively check whether the cement wall in the blank room needs to be painted is solid and flat If the plastering layer on the wall is not strong enough or there are large cracks and holes, it is recommended to complain to the developer or the property owner and ask them to redo If some holes are repaired by ourselves, gypsum can be used to fill them Special note: 1 Check whether the wall is solid and flat is a step of checking the house To see if the wall is solid, a simple test method is as follows: find a hard point object (such as key, screwdriver, etc.) and make a stroke on the wall to see if there is slag There is no shortcut to find cracks and holes, only care and patience 2 Generally, it is not recommended to apply putty and paint in kitchen and bathroom, and it is better to stick ceramic tiles Tiling is also a science We will talk about it later Step 2: finished product protection When dealing with the wall, there will be dust, and there will inevitably be putty, paint or other glue dripping, so we must do a good job of protecting the finished decoration products in the room in advance Special note: the protection work is listed as a single step, in order to increase everyone's attention to it Don't leave any regrets because of carelessness, especially when there are some decorations that can't bear dirty at home, there are too many posts in the forum asking about cleaning methods! Step 3: preparation before puttying Ensure that the wall surface is solid and flat, and clean the wall surface with steel brush or other tools, so that the cement wall surface is free of floating soil and heaviness as far as possible The concrete interface agent shall be rolled once on the wall to be as uniform as possible After it is dried (generally more than 2 hours), the putty can be scraped The special instructions are as follows: 1 The purpose of the interface agent is to close the base layer and prevent the putty from problems due to the loose, floating or excessively dry cement wall Its surface is more suitable for putty adhesion than the cement wall 2 If you do not plan to brush the interface agent, please pay attention to the following words: Construction in summer, the wall is dry, before construction, you should roll a layer of clear water (no open water left), to prevent the putty from pinholes or cracks due to too fast water absorption 3 New cement walls (such as developers redo plastering) must wait until the 28 day maintenance period of cement has passed before puttying Otherwise, it is easy to have puttying bubbles and insufficient strength 4 Paste cloth (kraft paper): its main function is crack resistance, high cost, general wall is unnecessary to do But for thermal insulation wall, loose wall and cracked wall, the effect of pasting is obvious, so it can be used Step 4: apply putty (please select water-resistant putty) Before puttying, the flatness of the wall surface shall be measured (with a measuring ruler of more than 2m) to determine the method of puttying Generally, the wall can be puttied on two sides, which can not only level, but also cover the background color Putties with poor flatness need to be scraped several times more locally If the flatness is extremely poor and the wall surface is inclined seriously, it can be considered to scrape gypsum once for leveling, and then puttying The interval time of each putty application shall be more than 2 hours (after surface drying) Special notes: 1 Choose water-resistant putty: 821 is a kind of putty restricted by the order It is not water-resistant, not strong, easy to peel and crack Many workers often add white latex, 108 glue and other glue to increase the strength of 821, leaving a hidden danger for health The water-resistant putty does not have the above risks It is solid, water-resistant, and can be used with water without any glue It does not need to be removed for long-term use (10-20 years) It is a product that can truly achieve "long-term benefit of one-time construction" 2 The water-resistant putty can't be scraped too thick, otherwise it will crack in the drying process, which is the beauty of the putty Therefore, when the flatness is poor, it needs to be constructed many times, and even use gypsum to make a thick base first Gypsum is not water-resistant, not solid, and the setting time is very fast, so it is obviously not suitable to scrape gypsum all over the house 3 When mixing the water-resistant putty, it should be configured according to the proportion of powder: water = 2:1 or so Use the electric drill to mix it first, and then place it for about 10 minutes after it is basically uniform Then use the electric drill to mix it fully, and then it can be used Step 5: polish the putty The water-resistant putty will become very solid after full strength (5-7 days), and it will be extremely difficult to polish at this time Therefore, it is recommended to polish the putty 1-2 days after scraping Grinding can be carried out at night, with more than 200W electric light bulb close to the wall for lighting, while grinding to check the flatness Special note: a large amount of dust will be generated when polishing putty Please prepare masks for the personnel on site Although putty is non-toxic and harmless, dust is not a good thing Pay attention to prevention Step 6: Brush primer After cleaning the floating dust on the polished putty surface, the primer can be applied The primer can be applied once, and must be uniform After it dries completely (2-4 hours), the next step can be carried out Special notes: 1 Primer: the function of primer is similar to that of concrete interface agent, but in addition to providing good adhesion, primer can also save part of the top coat At present, the pace of life is fast Many families often can't wait for the putty to completely dry and the alkali disappears (5-7 days) before painting At this time, it is more necessary to brush a layer of alkali resistant primer to seal the alkali resistance of the water-resistant putty (this is another flaw of the water-resistant putty) Otherwise, the paint is prone to appear problems, especially for the colored paint, and there will be the phenomenon of map like color imbalance 2 Whether the primer needs to be mixed with water can refer to the instructions of the primer purchased, which are different Step 7: apply top coat Generally, the top coat shall be applied twice, and the interval between each coat shall be more than 2-4 hours (depending on the surface drying time) until it is basically dry After the second finishing coat is applied, it will take 1-2 days to fully dry Before the paint is completely dry, attention shall be paid to waterproof, drought proof and sunscreen to prevent problems in the paint film Special notes: 1 Painting method: roller painting and spraying have their own advantages and disadvantages The surface of roller painting film is natural and textured, and the paint consumption is not much The surface of spraying film is delicate and smooth, but the paint consumption is more Specific options can be determined according to personal preferences and economic ability 2 Water content: most of the emulsion paint is sticky in the open cover state, usually some water should be mixed to better construction The specific water mixing amount of each kind of paint is different, but within 30% at most It should be noted that the mixing of colored paint must be careful, or the phenomenon of uneven color will occur easily Step 8: acceptance The surviving wall surface shall be solid, flat, vertical with the intersection of yin and Yang, free of cracks, holes, uniform color and full paint film Attention shall be paid to the protection of the finished product Special note: after the paint film is dry, the great work is basically finished, but don't be happy first, bite your teeth and finish the acceptance work! Although the above is just a case of various wall decoration, it is very representative Other wall decoration can be evolved from these steps Here's an example: the renovation of the old wall, but the first step is slightly different Just a little change, as follows: the first step of the renovation of the old wall: check the strength of the existing wall If it is firm, directly knock off the paint film of the surface layer, and then step 2 can jump into step 6; if it is not firm, shovel off all the existing wall skins, and then step 2 Special note: check whether the old wall is firm: 1 visually check whether there is peeling, cracking and bulging, if any, it is not firm; 2 find a blunt tool (such as a small hammer) to knock the wall, check whether there is hollowing, if any, it is not firm; 3 pour some water on the existing putty layer (polish off the latex paint), and shovel it with a spatula to see if it is easy to shovel off, if it is easy to shovel off, it is not firm 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,