How are putty layer bubbles and hollowing caused and how should they be handled?

Causes: 1. The substrate is too rough and the plastering speed is too fast;

2. The putty layer of a construction is too thick and greater than;

3. The moisture content of the base layer is too high, and the density is too large or too small. Due to the abundant voids, and the moisture content of putty.

high, and therefore impermeable, the air is enclosed in a void cavity and is not easily eliminated.

4. After a period of construction, the bursting and blistering on the surface is mainly caused by uneven stirring, in the slurry.

It contains powdery particles that are too late to dissolve, and after construction, a large amount of water is absorbed, and the swelling forms bursting.

Solution: 1. If there is a large area of blistered putty surface, use a shovel to directly break the small bubble mouth, and scrape the foam with a suitable putty.

of the surface layer. 2. The putty is generally stirred evenly, let it stand for about 10 minutes, and then use an electric mixer to stir it again and then put it on the wall.

3. If there is blistering in the second or last surface layer of construction, it should be blistered with a scraper before the watermark is removed.

In addition to treatment, ensure that there are no bubbles on the putty surface.

4. For particularly rough walls, the general base material should be coarse putty as much as possible.

5. In the environment where the wall is too dry or the wind is strong and the light is strong, first moisten the wall with water as much as possible, and wait for the wall to be empty.

After the open water, the putty layer is scraped.

There are many reasons: for example: 1. Improper treatment of the base layer, so that the putty layer and the base layer are not close enough to form a sandwich;

2. There is a dense layer between the base layer and the putty layer, such as the interface treatment without adding water to the base layer with glue, Zhanmubao or wall shovel, so that the air cannot diffuse to the base layer normally. There are ways to deal with it:

If the wall bubbles or hollow drums are small, they can be treated by grinding and then treated with a wall shovel for interface treatment, and then scraped in batches; If the hollow drum of the wall is large and has caused a large area to fall off, it is recommended to remove all of them and then use the wall shovel for treatment, and then scrape them in batches.

The bottom layer of putty is dry thoroughly, just over the surface, the surface layer is dried first, and the inner layer is still in the process of drying, resulting in different degrees of drying and shrinkage between layers, which is easy to hollow and crack.

When there are tiny cracks, polish, paste the good cloth or mesh cloth, brush the nest wall to cover it, and then scrape the putty in batches, and pay attention to controlling the thickness; Structural cracks often require the base layer to be completely removed during repairs, the cracks are cleaned up, and epoxy is injected into the cracks until the cracks are filled. Attach carbon fiber rip-proof cloth to the surface of the gap for reinforcement. Once these are done, they can be repaired with putty and latex paint.

In the process of decoration, if the putty cracks, it is likely that the ratio of water to putty is wrong. It is also possible that the environmental impact of the construction should be found, and the cause should be found before being dealt with.

The main reasons are:1The change of dryness and wetness will cause the deformation of the wall structure, so there will be dry shrinkage cracks.

2.Product quality, construction technology (such as batch scraping thickness), and maintenance methods may cause putty hollowing and cracking. After applying putty, pay attention to natural drying, do not open doors and windows, to prevent rapid water loss and affect construction and deformation.

You see if the putty hollow in your house is big, if it's not big, just shovel the hollow drum. The wall can be covered with a large area, which is also more suitable than shoveling and leveling.

For example, the putty is not thick enough to leave a certain gap, which is prone to hollowing and cracking. Another reason is that the wall is uneven, and the wall itself has a hollow drum, which can also be the case. If you want to deal with it well, you need to knock out the hollow part of the drum, and then knock out the hollow part of the wall, and then hang it up to make it much more beautiful.

The first point is that it is recommended that you use the finished putty paste for batch scraping. It is not recommended to use putty powder and then add water to stir, this kind of putty is generally difficult to control the quality. The second point is that I personally recommend that you must take sandpaper for careful sanding after scraping the first putty batch.

This effectively removes these air bubbles and provides a very good basis for our next layer of putty batch scraping.

It is necessary to ask a professional putty scraper master to do it, so that it can be avoided to a large extent, and it is necessary to choose a better putty powder, which can also solve many problems.

Choose a better brand of putty, and be sure to clean the wall before scraping putty, so that many problems can be solved, and you must pay attention to the technique of scraping putty, which is also very important.

At this time, it is necessary to choose high-quality putty, at this time, we must choose special instruments, we must choose high-quality workers, and after scraping putty, do not open the window in time for ventilation.

The reason for putty blistering, hollowing, cracking, and delamination

1.The strength of the mortar layer of the foundation wall plastering surface is too low, and there is the problem of desanding and sand removal, or the surface of the sand rubbing is too smooth, resulting in the poor bond between the scraped putty powder and the base mortar wall, resulting in hollow drum delamination and bagging.

2.Stir unevenly or add too much water to the putty, and mix too wet.

3.The base plastering mortar is too rough, there are many pores, and the air in the holes is squeezed when scraping and applying putty, and the air after squeezing becomes bubbles.

4.The wall is too wet, the moisture content of the base layer is too high, and the density is too large or too small. Due to the abundance of voids. The moisture content of putty is high, so it is not breathable, and it is easy to make the lower part of the putty powder layer contain air during the construction process, which is not easy to discharge, so it is easy to blister.

5.The single-layer batch scraping is too thick, and the air in the putty layer is not completely squeezed out.

6.Putty is prone to bubbles during construction under high temperature conditions.

7.The water absorption of the substrate is too low, which leads to the relatively long water retention time of the putty scraping, so that the putty is in a slurry state on the wall for a long time and does not dry, so that bubbles are easy to occur. This kind of problem generally occurs in the case that the strength of the foundation plastering mortar is too high, and the surface is too smooth, which is why the top surface of the template is scraped in batches in the project is more than the wall bubbles, because the water absorption of the sand rubbing wall is large, and the water absorption of the top surface of the template is very low.

The top plate with low water absorption is not easily squeezed out by the trowel, making it easier to develop pinhole-like pores.

8.After a period of construction, cracking and blistering appear on the surface: mainly caused by uneven stirring, the slurry contains powdery particles that are too late to dissolve, after construction, a large amount of water is absorbed, and the swelling forms a rupture (if putty paste is used, this situation will not occur).

The main reason for the bubbles in the use of putty powder is that the proportion of ingredients or the method of blending is incorrect, so if you want to better solve this problem, the most important point is to learn more from professional technicians and use it in the correct way, so that the effect will be more ideal.

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Do you feel comfortable when the person you're chatting with is smiling all the time? When his tone of voice makes you comfortable, do you feel the urge to continue talking to him?

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Reason 1Improper treatment during decoration construction, the wall base is not dry enough, or the original cement layer is not cleaned up and the putty is directly brushed;

Treatment: Before applying latex paint, the preliminary work of decoration should be done, and the doors and windows of each room in the room should be opened, so that the indoor walls and floors should be dried as soon as possible. If conditions permit, it can also be dehumidified to remove moisture from the air to avoid moldy and odorous latex paint in the hot flashes during decoration.

Reason 2: The quality of the material itself is not good, such as the quality of putty;

Solution: It is recommended not to be greedy for cheap materials when purchasing materials, and to choose well-known and high-quality materials. In addition, when scraping putty and brushing latex paint, it is necessary to pay attention to the process arrangement, stop work for a few days after scraping putty to ensure that it is dry, and extend the time to dry after the first application of latex paint.

The reason for the foaming and hollowing of the surface of the putty.

1. The base is too rough, not polished and smooth, and the speed of the wall is too fast in the process of putty construction, so that the putty layer is not close enough to contact the base layer and form a mezzanine;

2. The putty is too thick to scrape at one time, and it is easy to blister.

3. The moisture content of the base layer is too high, and the density is too large or too small. Because it contains abundant voids, the moisture content of putty is high, so it is not breathable, and it is easy to make the lower part of the putty powder layer contain air during the construction process, which is not easy to discharge, so it is easy to blister.

4. The base layer is too dry, and the base layer with too high water absorption rate or high cement grade is prone to bubbles.

5. The bursting and blistering that occurs after a period of construction is mainly caused by uneven stirring when the putty powder is stirred. The unevenly stirred slurry contains powdery particles that have not had time to dissolve, and during construction, brushing on the surface of the wall, there is no big disadvantage, but after a while, the powdery particles begin to absorb a lot of water, and then they expand and burst. As a result, the surface of the putty layer is blistered.

Resolution. 1. The putty powder is generally stirred evenly, let it stand for about 10 minutes, let the various ingredients fully moisten and dissolve, and then stir it again with an electric mixer and put it on the wall.

2. During the construction of putty, the wall should be scraped and pushed repeatedly, so that the putty and the base layer are fully contacted, moistened, infiltrated and diffused.

3. If the putty layer blisters on the second or last surface layer of the construction, the foaming should be broken with a scraper before the watermark is eliminated to ensure that there are no bubbles on the putty surface.

4. If there is a large area of blistered putty surface, use a shovel to directly break the small bubble mouth, and scrape the blistered surface layer with the putty powder batch on the inner wall.

Reasons for foaming putty powder.

Reason 1: The substrate is too rough and the plastering speed is too fast;

Reason 2, the putty layer of a construction is too thick, greater than;

Reason 3: The moisture content of the base layer is too high, and the density is too large or too small. Because it contains abundant voids and the putty has a high moisture content, it is not breathable, and the air is enclosed in the void cavity and is not easy to eliminate.

Reason 4, after a period of construction, only on the surface of the burst blistering, mainly caused by uneven stirring, the slurry contains powdery particles that are too late to dissolve, after construction, a large amount of water absorption, swelling to form bursting.

Solution: Method 1: If a large area of blistered putty surface appears, use a shovel to directly break the small bubble mouth, and re-apply the blistered surface layer with a suitable putty.

Method 2: The putty is generally stirred evenly, let it stand for about 10 minutes, and then use an electric mixer to stir it again and then put it on the wall.

Method 3: If the second or last surface layer of the construction is blistered, it should be pressed with a scraper to break the bubble before the watermark is eliminated to ensure that there are no bubbles on the putty surface.

Method 4: For particularly rough walls, the general base material should be coarse putty as much as possible.

Method 5: In the environment where the wall is too dry or the wind is strong and the light is strong, first moisten the wall with water as much as possible, and scrape the putty layer after the wall has no open water.

There are bricklayers painting mortar, maintenance water is not enough, the possibility of being empty, there is a high temperature on the top surface, the air in the gap expands when heated, the putty is jacked up Oh maybe, there is also the possibility of bad old foundation, and the possibility of roof seepage, I am a professional painter for 20 years, and others may need to go to the scene to see it.

At present, most of the houses are built with bamboo plywood or bamboo planks, and the concrete surface is relatively smooth, and the things that are plastered are very easy to hollow due to thermal expansion and cold contraction.

It may be a putty powder quality problem, or it may be a construction problem.