The old wall should be repainted, and what are the precautions for painting latex paint on the old w

In the process of home use, or when renovating the home, it is often necessary to paint the old walls. So what are the precautions for painting the old wall with latex paint if the old wall needs to be repainted?

Latex paint is the common name of latex coating, born in the mid-to-late seventies of the twentieth century, is a large class of synthetic resin emulsion coatings represented by acrylic copolymer emulsion. Latex paint is a water-dispersible coating, which is made of synthetic resin emulsion as the base material, and the filler is refined by adding various additives after grinding and dispersing. Latex paints have many advantages that are different from traditional wall paints, such as easy to apply, fast drying, water resistance, and good scrub resistance.

In China, people are accustomed to use synthetic resin emulsion as the base material, water as the dispersion medium, add pigments, fillers (also known as physique pigments) and additives, and coatings made by a certain process are called latex paints, also known as latex coatings.

After brushing the latex paint, it must be noted that the latex paint will take 4 hours to dry completely. And at this time, the latex paint has not yet reached the ideal hardness, so it is necessary to do a good job of protection, and it is best not to touch the wall for a week. And when scraping putty on the old wall, it must be sanded evenly, otherwise there will be unevenness.

And the next time you repaint, you must deal with the cracks and wall warping, otherwise it will be very ugly in the end. And after painting, if there are some small flaws, you need to repair the wall. When painting, be sure to paint the ceiling first, and then paint the walls.

Do not add too much water during the process, otherwise it will affect the hardness and feel of the lacquer. When brushing, you must be careful not to lose powder and miss the coat, as well as the phenomenon of exposing the bottom.

Precautions for painting latex paint.

1.If the original melamine paint is made, remove the paint film and re-scrape the putty. Applying emulsion paint directly on it is prone to peeling off.

2.When applying putty on the old paint film, it is necessary to pay attention to the uniform grinding, otherwise there will be a phenomenon that the paint film will bloom after construction due to the different absorption of the substrate.

3.Recoat the old latex paint film again, you need to deal with cracks and warping, for hair-like cracks, you can directly cover the fine cracks with elastic products, for larger cracks, it is recommended to fill them with primer mixed powder, smooth and polish evenly after the construction is low, topcoat.

Generally, the walls will dry in about 4 hours after the paint is applied. It will dry out, but it won't dry completely, so it will take about a week. Before this time, children should not be allowed to touch the wall, otherwise it will easily lead to dents, or latex paint peeling off and other problems.

It is even more susceptible to stains. Therefore, it is safer to keep the children away from this space before it is completely well.

First of all, it is necessary to keep the old wall flat and clean, if there is a phenomenon of peeling or cracks, it must be smoothed, and the putty should be fully stirred when scraping, and then it should be polished, so that it will appear relatively smooth, and the process of painting should be as uniform as possible.

Pay attention to the problem of color difference, pay attention to the selection of latex, test the ambient temperature, master the basic technology, pay attention to the matching of coatings, and deal with cracks or holes.

Whether the old wall can be directly painted with latex paint, but it depends on the use time of the original latex paint wall and the degree of damage to the wall: if the original wall is latex paint, and the foundation strength is good, it can be directly brushed with latex paint after simple hair repair. Prepare before brushing.

Only when the foundation of the wall is good can it have the value of painting. Fill part of the wall surface, polish it flat, and wipe all the wall surface with a dry cloth (dirty areas can be wiped with a damp cloth). It is very important to wipe the wall and clean it (to avoid delamination), otherwise it will peel if it is not well combined.

<>Yes! If the wall is dirty, you should use sand skin to beat it again, and then check whether the bottom is delaminated, and the latex paint is best sprayed for better effect, and the feel is smoother. First, observe whether the existing latex paint is defaced, bulging, if there is fouling, you need to remove the non-destructive part locally, use putty to re-repair, and re-paint after polishing.

If the wall itself is uneven, you need to re-level a large area and then brush latex paint.

Can be brushed. The original wall does not fall off, as long as the dust and debris on the wall are cleaned up, you can brush it. The place where the skin has fallen off needs to be cleaned and putty, and it can be dried and polished.

Do not roll in one place repeatedly when brushing with a roller brush, as the original paint surface is not firm and easy to be glued. After the original latex paint wall is used for several years, there are dust particles on the surface with an oxide layer, and there may be hollowing locally, which needs to be removed first. If there is, it should be treated and partially sanded before topcoat application.

You can find some professional companies or construction personnel to implement, if you consider the cost, you can consider that some brands of latex paint will generally provide painting services, and the cost will be determined according to the actual situation.

If you use a colored wall solid, to paint to test the strength of the base layer, there is no problem with the original wall base, but you paint the colored wall solid has become a problem, because the emulsion paint can not cover the color of the wall solid, you must go through a batch of putty scraping.

For the old wall, there will be some problems such as peeling and cracks, so you may wish to use a steel brush or shovel to flatten the wall and clean it until the cement wall is free of floating soil. The purpose of this is to make the new latex paint more firmly bonded to the wall.

Be sure to scrape off all the original wall paint first, so that you can brush the latex paint well, and the latex paint will not fall off the wall in the follow-up.

The old wall is shoveled off, leaving the cement mortar layer, and then the wall is cleaned, the latex paint is good to choose a brand, it is best not to mix it with other brands of paint, and it is necessary to pay attention to the fact that each time it must be dried before the next process of painting, otherwise there will be a lot of trouble in the later stage.

It should be noted that first scrape off all the walls that have been dry and cracked on the outside, then spray a small amount of water to keep them moist, and then paint the outside again with a layer of latex paint.

Before painting the old wall, the old wall should be cleaned, the old wall should be smoothed with sandpaper, and then painted with a layer of white paint, and then painted with latex paint after the white paint is dry.

You have to scrape off all the previous wall skins, then hang nets throughout the house, re-level, and then paint your favorite latex paint.

Use a broom to brush some dirty things on the wall and then respray latex paint, and you're good to go.

The old wall must be sanded clean with the previous latex paint before construction, otherwise the new latex paint will not stick firmly.

Answer: First of all, before deciding whether or not to remove the old wall. First look at the wall whether there is any blistering, peeling, hollowing and other phenomena, if not, you don't need to eradicate the old wall, you can directly paint after simple hair repair. If there is damage, it must be removed.

Next, you can choose to brush the interface agent. The interface agent can enhance the adhesion to the base layer and avoid the hollowing and shelling of the plastering layer. When brushing the interface agent, be sure to brush until it is evenly brushed.

After brushing the interface agent, it is necessary to level the uneven wall, and the uneven part of the wall should be leveled with stucco plaster, so that the error of the wall does not exceed 3 mm.

After brushing the interface agent, it is necessary to scrape the wall with putty, preferably twice. The purpose of scraping putty is actually to repair the wall and ensure that the wall is solid and flat. When choosing putty powder, try to choose putty with higher particle fineness and harder texture, and you can also add a certain amount of white latex to the putty, which can improve the hardness of the putty.

After scraping the putty, the putty should be polished. Try to choose a finer sandpaper for sanding putty, if the sandpaper is too thick, the wall will leave deep sand marks, and the final paint will not be able to cover. After sanding, sweep the wall to prevent too much dust from causing the latex paint to adhere to the deterioration.

After cleaning the wall, you can prime the wall, and pay attention to the uniform brushing of the primer with a roller, so that there can be no powder, leakage, exposed bottom, falling and other phenomena. It is best to use the same texture roller when painting. If the wall has a large amount of paint, you can add more water appropriately so that the latex paint is painted more evenly.

If there are some flaws after the primer is brushed, you need to make up for the wall, and pay attention to the patching must be polished and smooth. The topcoat painting process is the same as the primer, pay attention when painting, first paint the top surface of the ceiling and then paint the wall. There is no need to add too much water, otherwise it will affect the thickness, feel and hardness of the paint film.

If you want to paint latex paint, you need to remove all the putty on the old wall, so that the latex paint is more cohesive and the effect is also very good.

First of all, the wall must be flattened, shoveled clean, and the cement wall does not have any floating soil, so that you can brush latex paint, which can make the latex paint and the wall more bonded.