Roof Construction Methods for Houses with Prefabricated Floor Slabs

There are mainly two common methods for roof construction in houses with prefabricated floor slabs: pitched roof laying and flat roof elevated thermal insulation.

Pitched Roof Laying with Prefabricated Floor Slabs

In some cases, to save costs, a method of placing 5-hole prefabricated slabs on pitched roofs is adopted. From the front, this laying method is not very noticeable, but from the side, one can clearly see the 5-hole prefabricated slabs neatly arranged on the slope. However, due to the slope of the pitched roof, there is a risk of the prefabricated slabs sliding off. To enhance stability, a horizontal structure is usually installed at the end of the prefabricated slabs. This horizontal structure serves as a barrier and fixation device, preventing the slabs from sliding down the slope under the influence of gravity or external forces, ensuring the safety and stability of the roof structure. This method is suitable for housing construction scenarios where cost is a significant consideration and the roof slope is relatively not very steep.

Flat Roof Elevated Thermal Insulation Method

In the thermal insulation treatment of self-built house roofs, for flat roofs, there is a common method that utilizes prefabricated floor slabs. First, a certain height is built up on the flat roof using bricks, typically ranging from 10 to 20 centimeters. This height range is determined based on thermal insulation requirements and actual construction conditions. Building up this height provides space for subsequent installation of prefabricated slabs, forming an elevated layer. Then, the prefabricated slabs are installed on the built brick piers, creating an elevated thermal insulation form. The elevated layer prevents direct heat transfer, and as air flows within the layer, it can carry away some heat, providing good thermal insulation. Finally, a plastering mortar treatment is applied to the surface of the prefabricated slabs. The plastering mortar not only protects the slabs from erosion by the external environment, such as rain wash and exposure to wind and sun, but also makes the roof surface flatter and more aesthetically pleasing, improving the overall quality and lifespan of the roof. This method is suitable for regions or buildings in hot climates with high requirements for roof thermal insulation.