The roof, whether it is a sloping roof or a flat roof, is a roof design advocated by international healthy houses at present, which has a good effect in heat insulation and waterproof. Looking at the design structure and building materials of the top floor, it is important to have heat insulation and waterproof performance. Property buyers who intend to buy the top floor should pay special attention to the decoupling unit between the top floor design and building materials. They can consult the developers and ask them to provide relevant design and construction materials to verify whether they meet the building standards. If it is an existing house, it should also be verified whether the thickness of the top insulation layer is greater than 20cm. Check the drainage in rainy days.

Existing houses should also check whether the top drainage system is perfect in rainy days to see the water accumulation. The top floor with convenient water pressure may also have problems such as insufficient water pressure, small tap water flow and slow ignition of gas stoves. Existing buildings can be directly discharged to the penthouse for inspection. For some people who live in the property, you can first understand the water pressure of the duplex owners who have already stayed. If it is a temporary building, the developer should be required to provide materials such as water pipe materials. Roof insulation layer is also called roof insulation layer, that is, building materials are installed on the upper and upper parts of the roof to protect the roof from sunlight and heat, so that the temperature of the top floor will not be too high due to solar radiation and the comfort of the top floor will be improved.

The roof of a building is the most affected by outdoor heat, especially in the hot summer and cold winter areas. The main characteristics of hot summer and cold winter areas are long summer and hot and humid; Winter is short, cold and humid. Therefore, the roofs in this area should be insulated in summer and winter. The main methods of building roof insulation are single-layer ventilated roof, water storage planting roof and vegetation roof, and double-layer ventilated roof. The single-layer ventilated roof can cool down, but the drop is too small and the heat insulation effect is not ideal.

The practice of double-layer ventilated roof is three kinds of heat insulation measures: light color treatment of outer surface, double-layer ventilation and base insulation. The heat insulation effect is better than that of single-layer ventilated roof, but this practice only considers heat insulation and has no good waterproof performance. Water storage planting roof uses aquatic suspended plants to block solar radiation, reflect and absorb solar radiation heat, and store water for evaporation to improve heat preservation effect. The planting roof is covered with soil or vermiculite, on which dense-leaved plants are planted, and the shade of plants is covered with soil to keep warm.