What should I do if the black cement top putty for home improvement is shelled after scraping?

First of all, the cracked and peeling area needs to be wet, and then the latex paint layer and putty layer are removed with tools until the base layer, and then targeted treatment is carried out according to different reasons. If the wall skin is cracked and peeled off due to water seepage or anti-alkali tide, it is necessary to carry out oxalic acid comprehensive roller coating treatment first, and then carry out the construction of putty layer and latex paint, and can be painted with waterproof latex paint; If the wall chalking is more serious, it is necessary to roll the wall solid or interface agent and then scrape the putty and paint the latex paint. The reason why the roof putty cracks and falls off.

1. Serious dampness Serious dampness is one of the important reasons for the cracking and falling off of roof putty. For example, rain leakage caused by poor waterproofing on the top floor, condensation condensation caused by poor insulation layer, or damaged pipes above the roof, etc., will cause the roof wall to crack due to serious moisture, and then cause the wall skin to fall off. In this case, it is necessary to solve the problem at the root, although the process is complex and difficult.

First of all, it is necessary to remove the latex paint layer and putty layer, find the cause of moisture and then carry out targeted treatment: the water leakage on the top floor needs to be plugged first, redone waterproofing, and then scraped putty; If the pipeline is damaged, it is necessary to find the damage point for plugging the leakage, and then re-construct the putty layer and latex paint layer.

2. Construction mistakes Poor putty quality, leveling layer The putty layer is too thick and other construction mistakes, which will also directly lead to cracking and hollowing of the roof wall during later use, which will cause the wall skin to fall off. The solution is still to remove the cracked and falling off area first, and then scrape the putty again after leveling, and remember to choose a better quality product for the putty. At the same time, the leveling layer and putty layer should not be painted too thickly to avoid cracking and falling off again.

3. Grassroots problems As we all know, the batch of putty scraping on the base layer usually needs to be brushed or brushed on the wall first, otherwise the adhesion is insufficient and the wall sanding will easily cause the putty to crack or fall off. If the wall skin falls off due to this reason, after removing the putty layer to the base layer, it is best to brush a layer of wall solid and then scrape the putty normally.

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The cast-in-place wall top has made a layer of light gray putty before the delivery of the house, and a layer of yellow wall solid has been made on this layer of gray putty before decoration, and then the white putty is made when the worker enters the site, and then the paint is polished, which is such a step. After agreeing to knock the putty at the hollow drum on the spot, after careful observation, the top of the cast-in-place wall and the putty falling off are very smooth. As shown in the figure below.

At this time, it can be determined that the developer's light gray putty has too poor adhesion and cracks and falls off caused by hollowing on the top of the cast-in-place wall.

Remove the putty sheet that falls off, the putty is light gray, and the light gray putty layer is gently scraped with a knife, and the light gray putty layer is scraped to reveal the yellow wall solid layer, and then the ground solid layer is scraped off, which is the white putty layer.

The putty has the problem of falling off, and it is also the phenomenon of the top surface falling off, and it is also the top of the cast-in-place wall before the developer has made a layer of gray putty, and before the decoration, a layer of yellow wall solid has been made on this layer of gray putty, and then the white putty is made when the worker master enters the site, and then the paint is polished, which is such a step. After agreeing to knock on the putty at the hollow drum on the spot, after careful observation, the falling off is caused by the loose gray putty at the base level, and it is not layered with the top of the cast-in-place wall. The same is used to scrape the gray putty layer with a knife, and after scraping the gray putty layer, the yellow wall solid layer is revealed.

If it is a black cement top putty, and then it is shelled after a long time, because of moisture, this needs to scrape off the previous one, and then decorate it again, only in this way can it be solved.

The lines that were glued at the beginning were not done. It should be glued with plaster and glue so that it doesn't fall off. You first shovel off the layer of sand ash you said, (you must shovel, no matter what you do, this layer will shell and peel off, because this layer is the bottom layer), in fact, the most particular thing about decoration is actually the invisible thing, the bottom layer is one of them, you can find an oiler to shovel off the sand ash, and then buy some putty, 901 glue, and some other oilman's accessories on it, of course, it is better to shovel the bricks and then batch the cement again, pay attention to shovel off the sand ash to roll the glue and then batch the ash, If the batch of cement should be sprinkled with water on the brick wall first, the cement should be batched and then the ash, when the ash is batched, it should be rolled again and then the putty, the general wall batch 3 times putty is almost, of course, this should be decided according to the actual flatness of your wall, and the proportion of glue should be added from more to less, that is, the first time the ash should be glued more, increase the attachment force, the second time should be reduced accordingly, the third time as long as a small amount of putty can be added, so that it is convenient to polish, In fact, you only need to find a professional oilman to tell him the situation, and tell him that he must pay attention to prevent the shelling from peeling off in the future, and he will deal with the ratio of glue and putty powder according to the actual situation!

It is possible to scrape the black cement on the cast-in-place top and then scrape the leveling putty, but the following points need to be noted:1The cement slurry of the cast-in-situ roof should wait for a certain period of time, and then do not make trouble with the scraping and leveling putty of the black cement after its initial setting, so as not to affect the strength and stability of the cement with a dry mold cover.

2.When scraping and coating black cement, pay attention to the thickness and uniformity of the brush, so as not to cause problems such as uneven thickness of the surface layer or fish scale cracks. 3.

Before pasting the leveling putty, the surface of the cast-in-place black cement should be treated to make it fully boring, otherwise it will affect the adhesion and flatness of the leveling putty. In short, this kind of project needs to refer to the specific code wax situation and engineering requirements, and operate in strict accordance with the specifications in the construction to ensure the quality and safety of the project.

The reason why the putty powder on the interior wall falls off is that the hardness of the interior wall is not easy to scrape off, and there are also reasons why the quality of the putty powder is not good and it is caused by moisture.

If the wall base leveling decoration is used with non-water-resistant putty, in the living environment of moisture, moisture, water vapor, etc., the non-water-resistant putty layer is easy to powder, loose, mold, in addition, the non-water-resistant putty itself has low bonding strength, and the wall is prone to cracking and falling off.

Therefore, it is recommended that environmentally friendly water-resistant putty should be used for the leveling and decoration of the wall base in the southeast coastal and humid areas.

The wall putty layer refers to a thin layer of gypsum material painted on the wall as the base layer of the wall. The putty layer plays a role in leveling and filling the defects of the wall, and is an indispensable and important part of the wall construction. However, in the process of use, we will also encounter some problems, such as the shelling of the wall putty layer.

This phenomenon usually occurs on the surface of the putty layer or on the bonding surface between the bottom layer. Hulling will not only reduce the aesthetics of the wall, but also affect the overall structure of the wall. So what to do with the shelling of the wall putty layer?

1.Find out the cause of the shelling.

First of all, it is necessary to find out the cause of the shelling. In general, there are several main reasons why this happens:

1) The bottom wall is not smooth, dry, or grease and other impurities.

2) The surface of the putty layer is too rough or too thick.

3) The choice and use of coatings (lacquer, latex, etc.) is incorrect.

4) Construction in rainy weather or low temperature leads to poor drying of the putty layer.

5) Wall loosening, thermal expansion and contraction and other deformation or external force damage.

2.Dispose of the place that falls off.

When handling, use a carving knife to cut off the part that has fallen off, and completely remove the loose or peeling part. Then wipe and dry with a clean, damp cloth to ensure that the ground is dry, otherwise it will affect the effect of re-application.

3.Backfill putty.

Inject the appropriate putty material into the applicator and press on the undulating areas to fill in the gaps. If the putty material is too dense, you can add a certain amount of water, which makes it easier to apply and fill. Keep the material dry after filling, which can speed up its drying.

It is advisable to use a hard putty material, which is more durable, only needs to be pressed and fill the voids, this method can be used in the reconstruction process.

4.Polished finish.

If there are some undulations in the putty material after drying, you can use a sanding machine or sandpaper to carve it into a smooth and new surface.

In short, when the wall putty layer appears shelling, it must not be ignored. If it is to be treated correctly, the above methods can be used for repair, but the more important thing is to find the root cause of the treatment method, so as to provide a guarantee for avoiding the shelling of the wall putty layer in the future.