It is not a coincidence that, upon the arrival of the rainy season in the hangzhou river, a number of houses began to seep, the walls began to drum up, the basement floor was resurfaced, and the furniture edges suffered from impervious deterioration, but rather natural feedback from ageing or leaking initial construction of the building's waterproof system. A practical understanding of the local climate, the structure of the old house and the pain point of the new project has been accumulated through water-proofing projects。
The house is the first line of defense for the building
The coastal zone is characterized by high humidity and high temperatures during the day and night, and concrete houses are prone to small cracks due to the heat and cold contraction; when the slopes are released, the water pours into the conservatory layer along the roof. The water-proofing project uses a stratification diagnostic method: first, to observe the direction of the water-spill trail, then to locate the hidden seepage point with infra-red thermal imaging support, and finally to perform targeted repairs with flexible water-proof paints combined with root-resistant piercing scrolls. The whole house is not blindly removed, nor is it covered by a single material, and each patch corresponds to the original structure logic。
Basement return needs to distinguish between “seep” and “tip”
Many owners have mistakenly attributed the return of the wall to leaking water from the outer wall, while part of the river's sub-areas of underground space is lower than the permanent water table, and the backfills are saturated with water, and the steam continues through concrete holes. The water-proofing project will simultaneously detect the water content of the wall and the relative humidity of the environment, giving priority to the application of cement-based permeable crystal coatings on the side of the house, supported by a local conductor sink, to the catchment point, and the containment of pressure water sources from the inside by polyurethane plating in case of structural leakage。
Waterproof logic in the retrofitting of the old house
The multilayered dwellings of the river built in the 1990s often suffered from hidden defects such as the break-up of the daughter's wall, the defouling of the water pipe interface and the leaking of the balcony. The leak-proofing project is subject to structural review prior to construction: checking whether the drainage slope is still in line with the 2 per cent norm, verifying the failure of the embossed suture and assessing the compatibility of the original water-proof layer with the new layer. The patches are not superstitious, but rather provide a synergetic response from old and new materials to temperature deformation and grass-roots stress changes。
The selection of materials is subject to the actual conditions at the scene
In the face of sunlight, high-reflective acrylic aqueous coatings are selected to reduce surface temperature; high-extension polytyrene elastics are used for areas with a high-intensity vibration of the equipment base; and for ventilated surface roofs, a single group of humid solid polyurethane with a good permeability. There is no standard formula for the water recharge project, and all material combinations are determined on the basis of the daily measured grass-roots water content rate, environmental humidity and subsequent use demand dynamics。
Details determine long-term effects
These practices of laying additional layers in the cavity, arcing the root of the pipe, and stationing the water in the perimeter of the housing unit are not process devices, but rather effective nodal treatments that have been validated by the river for many years. During the implementation of the water remediation project on the site, video recording of each closing, docking and sealing area is maintained to ensure traceability of critical processes. Upon completion of the repairs, no less than 72 hours of closed water or water showers are arranged to verify the reliability of the process by actual leakage reaction。
The continuity of service stems from the nature of the problem
A single omission does not solve all the risks, especially when the fall of the building is not stable or there is leakage in the surrounding municipal network. Upon completion of the water recharge works, basic maintenance advice will be provided, such as regular cleaning of leaves in the ditch, detection of the looseness of stationary card parts in the landing tube, and observation of changes in the interior field floor. These actions, which appear to be frivolous, are the real feeder of slowing the ageing of the water protection system。
The coastal river is built at a pace of territorial respiration and waterproofing. Water-proofing projects do not commit themselves, but rather insist on the reverse cause from leakage marks, respond to the demand for construction with suitable materials, and allow repair actions to be embedded in the building life cycle。
