Moisture-proof problem of villa basement and ground moisture regain

Whether it is villa basement or townhouse basement, basement moistureproof has always been the key work of building ground wall and underground part maintenance. Improper moisture-proof measures, the initial performance is the root of the wall seepage. At this time, it should be noted that in the process of building the basement wall, in order to avoid leakage of brick joints, the masonry mortar used for masonry must be full; Clean the root of the wall thoroughly first, and then start plastering the inside and outside of the external wall to ensure that the plastering of the root of the wall meets the design requirements, and the junction of the internal angle of the external wall and the foundation can also be treated as a splayed angle; To ensure that the indoor elevation of the basement is higher than the bottom elevation of the waterproof mortar of the external wall. In the process of laying the flexible waterproof layer of the external wall, the root of the wall can also be specially treated, but the paving should be compact.

The deformation joint of the basement wall is also the most vulnerable place to get wet. Generally, it is advisable to fill the leakage gap with foam board, then plug it with asphalt hemp fiber, and then coat it with ointment, so as to ensure the deformation of the deformation joint without affecting the moisture-proof and waterproof effect of the basement. A protective wall must be built outside the damp-proof layer in the basement, which is wider than the damp-proof layer 120. The gap between the damp-proof layer and the waterproof layer of the protective wall should be filled with cement mortar to avoid damaging the waterproof layer when the foundation pit is backfilled.

The hole in the wall caused by the pipeline passing through the basement has always been an obstacle to the moisture-proof of the basement floor. After the pipeline is installed, it can be tamped with hardened cement mortar or plain cement around, and waterproof mortar can be coated outside. After drying, two layers of polyurethane waterproof coating film can be coated within the range of 35mm greater than the outer diameter of the pipeline.

When heating pipes pass through the wall in the basement, attention should be paid to the problem that the pipes expand with heat and contract with cold. After the pipeline is installed, use asphalt hemp to punch holes in the wall, brush cement mortar on the outside of the wall, and then brush two layers of polyurethane cold waterproof film according to the above method.

In the experience of solving and dealing with the moistureproof of villas, ground floors and basements, we often choose special moistureproof liquid for PANHOO for the ground. Its service life is consistent with your ground life. As long as you don't destroy your building foundation, your moistureproof layer is permanent and effective. It is integrated with your base surface, has sufficient thickness and is not afraid of foaming and cracking. The original moisture-proof layer was destroyed due to nailing and other reasons, and the product still has the repair function when it encounters water vapor.

When there is water seepage at aproll, in order to avoid the disconnection of the moisture-proof layer at aproll, the waterproof mortar of the external wall should be about 150mm higher than the top surface of aproll or foot, and then the gap between aproll and foot should be filled with ointment according to the construction requirements; At the same time, in order to ensure the moisture-proof effect and prevent water seepage in the basement, the basement wall must be built with cement mortar, and the mortar joint should be full.

There is water seepage at the joint of the wall. Before laying, the surface of the brick should be wetted with water, and then mortar should be laid. When laying, ensure that the mortar joint is dense and full, and the mortar joint should be sharp; Before plastering the external wall, check the mortar joint, and if there is any loose joint, strengthen the joint repair.

In order to avoid the influence of surface water or groundwater on the basement, flexible waterproof layer should be made on the outside of the wall, and then waterproof layer should be made on the outside. The water-resisting layer is generally made of 2:8 lime soil, and its cross section is inverted trapezoid, with the lower part at least 500mm wide and the upper part 500mm wider than aproll. If the external wall is provided with a horizontal moistureproof layer, the elevation at the bottom of the waterproof layer must be 150 ~ 200mm higher than the horizontal moistureproof layer. If there is no horizontal moistureproof layer on the external wall, the bottom of the waterproof layer should be about 150 ~ 200 mm higher than the indoor standard of the basement.

If you want to ensure the smooth drainage of the ground outside the villa basement, and the outdoor ground is at least 20mm below the minimum apron, you should always check the outdoor drainage pipeline to ensure normal drainage and prevent water leakage; At the same time, the accumulated water in the heating ditch should be discharged in time, and the outdoor seepage water source should be managed in strict accordance with the relevant requirements, so as to fundamentally prevent the occurrence of seepage problems and prevent the basement from seeping back and getting wet.

Therefore, we should take a correct view of the resurgence and leakage of the basement, and at the same time adopt various means such as design, construction and property management to carry out strict management, make a detailed analysis of the resurgence and leakage that has occurred, find out the reasons in time, and adopt permanent moisture-proof materials to rectify the basement in Panhu, so as to fundamentally eliminate this problem.