After painting latex paint, does the wall still need to be treated?

Need. After the wall is painted, it is completely dry, and the entire wall is polished with sandpaper to make the wall more flat and beautiful. After the decoration is completed, the bumps on the wall due to various bumps also need to be touched.

If the latex paint is brushed, the wall still needs to be treated, and a special polishing method should be used to make the whole wall look particularly smooth and clean, so that the overall wall feels particularly beautiful and generous.

No need to deal with it. Latex paint is the last step in wall treatment, leveling and cracks are generally treated with gypsum putty paste, and latex paint only changes the color of the wall.

Generally, after brushing latex paint, it is necessary to repair it again after the decoration is completed. Because there will still be bumps and bumps in the process of renovating and installing furniture, etc., which is unavoidable.

Before painting, you should comprehensively check whether the cement wall that needs to be painted is solid and smooth. If the wall is not strong enough or there are large cracks and holes, it is advisable to complain to the developer or property and ask them to redo or repair the wall.

Nowadays, there are more commercial houses with white walls when they are delivered, which seem to be clean but may have hidden dangers, check the strength of the wall and the water resistance of the white material;

Not water-resistant or water-resistant general, long-term use should be shoveled off and redone, short-term use is best to do a curing, should check whether the wall is hollow, hollow drum must be shoveled off.

Features of latex paint:

After the construction of building latex coating, with the rapid evaporation of water into a film, in the case of good construction environmental conditions, a day can be multi-channel painting construction, greatly shorten the construction period, save construction costs.

Good opacity is an integral part of a high-quality latex paint, which represents a better, less time-consuming and less cost-effective stucco job.

Good adhesion avoids cracks and blemishes, and ease of cleaning ensures gloss and color retention, which are important indicators for the selection of latex paints.

Wall Treatment Process:

Step 1 Check.

Situation 1: Cement wall. Comprehensively check whether the cement wall that needs to be painted in the blank room is solid and smooth.

If the plastering layer on the wall is not strong enough or there are large cracks and holes, it is advisable to complain to the developer or property and ask it to be redone. Individual holes can be filled with plaster if repaired by yourself. If the flatness of the wall is poor (the error is greater than plus or minus 5mm), you should consider doing plaster leveling first.

Situation 2: Putty wall. Be sure to check whether the wall putty is qualified water-resistant putty, if not, you must shovel off and redo the water-resistant putty. Other items are the same as in case I.

The process of brushing latex paint:

1.The proportion of water added to the roller coating is generally controlled to 20% to 30% according to the volume ratio, and if there is too much water, it is easy to cause the poor film formation of the latex paint.

2.Stir the paint and water well and let it stand for 20 minutes to achieve the purpose of defoaming, so as to avoid needle holes or small bubbles after the latex paint is applied to the wall.

3.Still time passes. It's time to paint. Then moisten your tools with water first, such as the wool brush and roller in the corner of the shady corner, first moisten with water, and then dip the material. The next step is painting.

4.Latex paint is painted according to the standard process, which is applied in a bottom-to-bottom and two-sided way.

1) The first brush primer plays a role in closing the alkalinity and increasing the mechanical occlusion (adhesion) of the bottom coat, and the painting process is the living room and then the bedroom, and the top plate (ceiling) and then the wall.

2) If you feel that the wall is not delicate enough, you can also gently remove some small particles on the wall with water sand before brushing the second topcoat.

3) Paint again after 2 to 4 hours after each painting, or feel it with your fingers, if the paint surface pressed with your fingers does not feel sticky (acupressure dry), then it means that you can paint.

4) The position of the switch box and door cover and window cover should be covered with masking paper before painting. Masking paper can be bought together when you buy a roller and a wool brush.

The treatment of the wall before painting latex paint is as follows:

1. Comprehensively check the flatness and solidity of the wall, if the wall plastering layer is not strong or there are cracks and holes, use a shovel to remove the skin and loose places, and then repair it with gypsum, polish it flat, and then cover it with a layer of wall solid.

2. After the plastering layer is dry, you can apply and scrape the putty twice, and only after it is dry once can you scrape off a putty.

3. After the putty layer is dry, it can be smoothed with sandpaper, and then painted with latex paint.

Latex paint

Also known as latex coating, born in the mid-to-late seventies of the twentieth century, it is a kind of organic coating, which is a kind of water-based coating prepared by adding synthetic resin emulsion as the base material, adding pigments, fillers and various additives, which has the advantages of easy brushing, rapid drying, water resistance and good scrubbing resistance of the paint film.

Latex paint is a water-based coating, their paint film performance is much better than solvent-based paint, accounting for half of the organic solvent of solvent-based paint is replaced by water here, so the toxicity of organic solvent is basically solved by latex paint.

In addition to different types of polymers or polymers that are harmless to water and safety, latex paint also contains a small amount of emulsifier and a trace amount of unpolymerized free monomer, which is a small molecule that can be volatile, and there are different degrees of toxicity.

It is generally not recommended because of latex paint.

After a long time, the wall may burst or be too dirty, which will affect the repainting. If it is a burst skin, it can be repainted later, but it will still peel after a long time, so it will be more than worth the loss, so it is recommended to scrape it off again and then paint.

Recommended Considerations:

1. Soak the wall with water first, and then use a scraper to scrape off all the latex paint, and then check whether the wall is cracked or holed, if so, you need to use gypsum putty first.

After the wall is filled, the latex paint is applied.

2. When carrying out construction, the wall must be brushed with primer first, and then brushed with topcoat after it is completely dry, otherwise there will be a situation of re-damp patent leather after a long time.

3. The working environment must be closed, and there must be no children, otherwise there are many dangerous goods during construction, which are very dangerous for children, and many chemicals in it may also have an impact on health.

4. If you finish brushing, you must pay attention to ventilation, and wait for the smell in the room to dissipate before going in to live or move.

5. During construction, the interior or furniture that has been decorated should be covered with dust cloth or plastic cloth to prevent dripping pollution.

When decorating the home, you can use latex paint for wall treatment.

However, if the wall has been painted with latex paint, and you want to repair or renovate it later, it is basically not feasible to paint it directly on the surface. Because the original latex paint wall has the problem of powdering or slight cracking, these problems will affect the effect of later brushing. Moreover, if you brush directly on the surface, the paint film is relatively thick, which can easily lead to dry cracking and peeling off.

Because it is difficult to ensure that the original wall is not contaminated, some may be stained, blackened, yellowed, or painted by children, and this kind of wall must be cleaned before it can be repainted. 2. If there is no putty scraping on the wall.

Or it turns out that there is latex paint on the wall, but without any treatment, it is directly painted with latex paint, and there are many problems. For example, in the later stage, it will be found that the whole piece will fall off, mainly because the original latex base layer has been powdered. 3. If you scrape putty directly, putty powder.

There will be a certain tension after solidification, and the latex paint on the original wall will be directly pulled down, so eventually the whole wall will directly peel and crack.

The following treatments should be carried out before painting the wall with latex paint:

1. Tidy up the grooves on the wall.

When the width of the top surface of the wall is slotted (the width of the single pipe groove is 40mm), the width of the bandage must be greater than the width of the slotting 40mm, and when the width of the wall is slotted more than 60mm, it is required to paste at least 300mm.

2. The overall leveling of the wall.

The original wall leveling thickness is less than or equal to 20mm; Leveling thickness greater than 20mm must be leveled with cement mortar, and the flatness of the wall after leveling is less than or equal to 3mm.

3. Scrape putty.

The wall is scraped three times with water-resistant putty, and the flatness of the putty scrape is less than or equal to 2mm.

4. Install the gypsum line.

The gypsum line is spliced with eight figures, and the gypsum line is spliced without dislocation, and the line is clear.

5. Waterproof treatment.

The wall surface needs to be waterproofed before being painted with latex paint. You can do it all, or you can only do the necessary position, the location that must be done is the toilet and bathroom common wall, these walls are easy to get wet, and the other is the wall of the exterior wall, which is easy to rain and infiltrate the damp. When the wall cement wall is to be made a waterproof layer, when the paint is hung, it is also necessary to do a back cover, so that the putty will not be powdered before it can be sprayed and pasted with wallpaper.

Construction process of new house: production wall skin - scraping putty - primer 1 time - topcoat 2 times.

Renovation of old houses: Brush the top coat twice after sanding.

How to deal with the front wall of the painting.

2. Leveling: uneven walls need to be leveled, general gypsum is more commonly used, and the uneven difference is better than centimeter.

3. Sticker: Generally, non-load-bearing walls such as light walls and thermal insulation walls need to be pasted, try to choose a better texture wall cloth and white latex, if there are conditions, you can use grid cloth, the relative anti-cracking effect will be better.

4. Batch scraping putty: it is better to choose putty with high particle fineness and hard texture, and you can also add a certain amount of white latex to the putty, which can improve the hardness of the putty.

5. Grinding: try to use finer sandpaper, generally use 400-500 sandpaper for softer putty, and 360-400 for harder texture, if the sandpaper is too coarse, it will leave deep sand marks, and the paint can not be covered. After sanding, the wall must be thoroughly cleaned to avoid too much dust and affect the adhesion of the paint.

The difference between bumps and bumps does not exceed 3 mm.

1.It is best to level the walls with a steel brush or shovel and clean them until there is no floating dirt on the cement walls. The purpose of this is to make the new latex paint more firmly bonded to the wall.

2.The peel primer needs to be removed. Then roll a layer of concrete interface agent on the wall to achieve a uniform effect. Then scrape putty, the main purpose of which is to fill the walls, ensuring that the walls are flat.

3.Use fine sandpaper to polish the wall, commonly used 400-500 size. If coarse sandpaper is used, deep marks will be left on the walls, which even paint will not cover. In order to improve the adhesion of wall paints, it should be thoroughly cleaned after polishing.