1. There are cracks and water seepage on the wall. Under normal circumstances, professional construction teams will use hanging baskets, and maintenance personnel will carry out external wall construction.
2. The treatment method of roof leakage is: large cracks can be plugged, small cracks can be filled with glass glue, and external wall waterproofing agent can be used when repairing, which can be sprayed several times.
3. The wall is still developing because of foundation settlement, cracking and water leakage. The settlement of foundation is a slow process, which changes by several millimeters every year, but it is reflected on the roof. Although it has little effect on the overall structure of the house, a few millimeters will cause rain leakage. It is recommended to cover it with a thermal insulation layer. In addition, waterproofing agent is mainly used for wall surface, and the effect on roof is not very good. Then asphalt and linoleum should be used for roof leakage, which is simple to operate, but has a short service life and needs to be done again in 3~5 years.
4. Before waterproof construction, the roof must be dry, because the water on the roof will not evaporate, and the new waterproof layer will jack up, and the waterproof effect will be invalid immediately. Therefore, it is not suitable for construction in rainy days, so we can only wait for the sun to dry the water before construction.