The wall at home is cracked, so don't rush to repair it. The first step is to find the cause of the crack, and then know what the repair plan is.
Generally speaking, there are several reasons for wall cracking:
1, long-term water seepage leads to wall cracking.
2. The wall construction is not standardized, and poor materials and technology lead to poor quality and cracking of the wall.
3. Cracking caused by wall problems, such as house settlement and wall deformation caused by earthquake.
If 3 occurs, it is not a problem that can be solved by patching again, so the following are the answers of 1 and 2.
How to deal with the wall cracking caused by long-term water seepage?
Seepage problem, we need to find the front and back.
The surface facing water refers to the side of the wall that is in direct contact with water. There are generally two kinds of such noodles.
First, the external wall (rain washing or external wall drainage pipe leaking, upstairs air conditioning leaking, etc.). ),
The second type is the tiled side of the bathroom and bathroom.
Man struggles upwards, while water struggles downwards.
There is water seepage in the outer wall or bathroom, and water gradually penetrates into the wall. On the other side, this side is the back water surface.
Over time, the back water surface will peel, mold and even crack.
Solve the wall cracking caused by water seepage. We should solve the problem of meeting the water surface first.
Then deal with the problem of the back wall, otherwise you will deal with it here, and there will be water leakage and cracking. Problems will happen again and again, and there will never be peace.
2. In addition to water leakage, other wall cracking problems generally belong to the poor quality of the wall due to irregular wall construction and inadequate materials and technology, which leads to cracking.
First of all, we must judge the construction scale:
1. Surface construction: If only the paint layer on the surface cracks, just shovel off the cracked surface and refresh the whole paint.
2. Overall fine construction: However, if the cracks are caused by wall problems, it is necessary to shovel the wall as a whole and refresh the wall from the most basic reinforcement and waterproofing.
So what is a complete fine construction?
1. First, cover the wall and shovel the wall.
Different from the previous road construction team, the first step of the professional team is to cover the whole house.
Take Nippon's refresh service as an example. In the first step, before shoveling the wall, the workers will wrap all the furniture and exposed places in your home except the wall with special shielding materials.
Then shovel the wall.
In this way, a lot of dust generated by shoveling the wall will not pollute your furniture and living environment. Let you check in quickly and ensure environmental protection and health.
2. Reinforcing agent lays the foundation
After shoveling the wall, there will be some dust on the wall, which will affect the adhesion of latex paint in the later construction. Brushing a reinforcing agent is to stick all the dust together and play a reinforcing role.
This layer can't be ignored, otherwise it will affect the construction quality.
Waterproofing is an indispensable process.
Next, waterproof, flexible waterproof and rigid waterproof are different according to different materials. If you want to stick tiles, you can't use flexible waterproofing, because tiles may fall down after thermal expansion and cold contraction. This should be chosen according to the actual situation. Or consult the construction team.
It is best to use big brands for these materials.
4, batch of putty, learned
Just finished cleaning and skin care steps, now it's time to apply foundation.
Yes, putty is the foundation of cosmetics. Very important.
The main component of putty is calcium carbonate. At present, there are self-made putty, putty powder and putty paste on the market.
There are many kinds of putty, such as water-resistant putty, cement-based putty and gypsum-based putty. And choose the specific putty type according to the specific process.
Considering environmental protection and durability, we must choose putty produced by big brands, such as Nippon Refresh Service, which uses the putty of Nippon's own brand.
It is worth mentioning that the professional refreshing service is carried out in strict accordance with the process of Nippon paint system in wall painting. During construction, two layers of putty are generally approved. Among them, the bottom putty combined with anti-crack grid cloth plays a good role in leveling the wall and strengthening the wall; The surface putty is the icing on the cake, which plays the role of collecting light on the wall and makes the whole wall painting project more beautiful and smooth.
Never let construction workers or road decoration teams make their own putty. Among them, whether it is environmentally friendly. Otherwise formaldehyde volatilization will make you miserable.
Many people will ignore this when decorating and spend a lot of money on latex paint. As a result, the putty inside is not environmentally friendly, safe and of poor quality.
The money was wasted.
1, anti-crack artifact grid cloth, recommended for wall cracks, say it three times!
Grid cloth is really good. Its main component is glass fiber, which is embedded in putty for reinforcement.
For example, the putty layer without grid cloth is equivalent to cement.
The putty layer with grid cloth is equivalent to adding steel bars to cement, which is equivalent to having a skeleton, which is both firm and elastic.
steel reinforced concrete
Take an extreme example. In summer, buildings are exposed to the sun. When the temperature is about 40 degrees, the surface of the cement base exposed to the sun can reach 80 degrees or even 90 degrees, while the place not exposed to the sun in the house is only about 20-30 degrees. The temperature difference of tens of degrees in the middle can easily lead to different thermal expansion and cold contraction on both sides, and the most likely result is cracking.
When the wall is about to crack, it will pull the putty layer to deform, making it stronger and preventing the wall from cracking.
Grid cloth system can solve most crack problems. After use, the subtle cracks on the wall will not appear again in a short time, unless there are problems such as settlement and earthquake of the big house.
Even better,
When my friend decorated, he directly chose Nippon's grid cloth, which is really a penny for a penny. The decorator praised this product for its convenient use, regular grid, even stress, smoothness and no stinging.
When some old houses are being refreshed, it is suggested that they be covered with grid cloth.
2. Mechanized grinding
Putty will have some knife marks and some uneven places when scraping, so it needs to be polished after scraping.
The traditional grinding method is sandpaper grinding, which not only has high labor intensity and low efficiency, but also produces very large dust, which is neither environmentally friendly nor healthy, and will also bring trouble to the subsequent painting (dust will affect the adhesion of paint surface).
Take the Nippon Refresh service that my customers use the most as an example. Polishing has been mechanized, using a dust-free grinder.
The principle is to turn labor into machinery, the grinder is equipped with a motor and a piece of sandpaper, and electricity is used instead of manpower. There is a tube behind the motor, and finally a dust bag is put on the tube, which is similar to the principle of vacuum cleaner.
At the same time of grinding, the machine sucks away the dust, and more than 95% of the dust will be sucked away.
3, it is best to make two layers of paint, primer and topcoat.
The last process is painting.
It is generally recommended to brush one primer and two topcoats.
The role of primer is to play a sealing role, because in addition to cement base, there are waterproofing, reinforcement and putty on the wall. If you brush the top coat directly, it is easy to pan-alkali, so after you brush the primer, the primer has a sealing effect, and the alkaline substances in these bases are sealed inside to avoid pan-alkali phenomenon.
Topcoat generally plays a decorative role, and the beauty of the house depends on it.
Primer and topcoat are best matched.
Primer is used for sealing primer, and topcoat is used for decoration and beautification, each of which performs its own duties and complements each other. When primer and topcoat are used together, the wall effect will be better and the wall life will be longer.
Of course, just like skin care, it is generally recommended to use the same brand and series of skin care products. When painting primer and topcoat, it is recommended to use the same brand, so that the performance of the coating will be better matched.
In order to pursue environmental protection, if the top coat is clean and the primer smells, the effect is still equal to 0, and it still smells. Therefore, if the top coat is clean and odorless, the primer should also be odorless.
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