Hollowing of the plaster mortar layer is a common problem in construction projects. If not handled in time, it will not only affect the stability of the building structure, but also the aesthetics of the building. Therefore. It is very important to find the cause of the hollowing and repair it in time.
The plaster mortar layer is a kind of paint directly applied to the brick wall in the construction project. If hollowing occurs, it may be that the paint is unevenly applied or the thickness is different, resulting in reduced adhesion. It may also be a quality problem of the brick wall itself.
First, we need to find out the specific location and cause of the hollowing. You can hear the location of the hollowing by knocking on the wall.
Then, use tools to clean the mortar layer in the hollow part, check the condition of the brick wall, whether there are cracks or deformations. And whether the quality of the mortar layer is uniform.

According to the results of the analysis, we can take the following repair measures:

1. Reapply the mortar layer.

If the hollowing is caused by uneven or uneven application of the original mortar layer. We can reapply the mortar layer. Make sure the paint is evenly applied. And the next layer needs to be constructed after the previous layer is dry.

2. Check and repair the brick wall problem.

If there are quality problems with the brick wall itself, such as cracks or deformations in the brick body, it needs to be repaired. You can use methods to reinforce the brick wall, such as re-bricking, reinforcing steel bars, etc. to avoid the phenomenon of brick pulling off.

3. Hollow drum grouting resin microporous grouting.

Hollow drum microporous grouting treatment technology is a new technology specifically for concrete hollow drums, stone, facing bricks, and steel plate hollow drums. Using the principle of high-pressure injection, the low-viscosity, high-strength, and slightly expanded hollow drum repair material-hollow drum grouting resin is injected into the hollow drum. Automatically complete the grouting of the hollow drum area. Improve the adhesion, integrity and durability of concrete structures, stones, facing bricks, steel plates and the base layer. Meet normal use requirements.

Regardless of the measures taken, maintenance should be done after the repair. Wait for the mortar layer to dry completely before carrying out subsequent work such as exterior wall decoration and painting. Pay attention to waterproofing and moisture-proofing to enhance the durability of the wall foundation.