Prefabricated Slab for Tile Roof

Prefabricated slabs can be used for constructing tile roofs, but specific construction methods and reinforcement and waterproofing measures must be adopted.

I. Application Methods of Prefabricated Slabs in Tile Roofs In rural self-built houses, prefabricated slabs are often used as the base structure for tile roofs. During construction, prefabricated slabs are first laid on load-bearing walls to form a horizontal support surface, and then the roof frame is built and tiles are placed on top. The advantages of this approach include lower cost, as the unit price of prefabricated slabs typically does not exceed 100 yuan per piece, and the overall cost is about half that of a cast-in-place roof; efficient construction, as prefabricated slabs can be directly hoisted and assembled without the need for on-site pouring or long-term curing, significantly shortening the construction period.

II. Limitations of the Prefabricated Slab Solution and Countermeasures

1. Poor structural integrity: Prefabricated slabs are assembled in pieces, resulting in weaker earthquake resistance compared to cast-in-place structures, especially in earthquake-prone areas, where caution is required. The overall connection can be strengthened by adding structural columns and ring beams, or a cast-in-place roof can be chosen as an alternative.
2. Prone to leakage at slab joints: Cracks may occur at the joints due to settlement or thermal expansion and contraction, leading to leakage. A waterproof layer (such as asphalt or felt) can be laid at the slab joints, or a double waterproof barrier can be formed by adding tiles.
3. Limited thermal insulation performance: The thermal insulation effect of prefabricated slabs is weaker than that of cast-in-place roofs, potentially increasing indoor temperatures in summer. The thermal insulation effect can be enhanced by the tile roof itself, or a thermal insulation layer (such as extruded polystyrene board) can be added to compensate for the deficiency.

III. Process Classification of Reinforced Concrete Tile Roofs Reinforced concrete tile roofs are a building construction form that meets fire prevention or造型 (aesthetic) requirements by placing tiles on prefabricated reinforced concrete hollow slabs or cast-in-place slabs. The processes are divided into two categories:

1. Linoleum tile-laying process: After laying linoleum on the leveling layer, tiles are laid by fixing the pressing strips and hanging strips with wooden wedges.
2. Waterproof mortar tile-adhering process: Tiles are directly adhered to the roof slab by applying waterproof cement mortar. This process is commonly used in the construction of imitation ancient buildings.

According to GB/T50855-2024 'Calculation Standard for Quantities of Imitation Ancient Building Engineering', reinforced concrete tile roofs have been included in the national standard system, which will come into effect on September 1, 2025.