Prefabricated Roof Tiles for Self-Built Houses

The selection of prefabricated roof tiles for self-built houses should be based on the type of roof. Common prefabricated roofs can be divided into two categories: prefabricated panel roofs and reinforced concrete slab tile roofs, with fundamental differences in their structural logic and tile application methods.

I. Limitations of Prefabricated Panel Roofs and Tile Adaptation Issues

Prefabricated panel roofs are made in advance from materials such as crushed stone, cement, sand, and small-diameter steel bars (coiled bars), and are directly installed on brick walls. These roofs have three major drawbacks:

1. Low structural safety: Prefabricated panels are not integrally connected to the walls, making them prone to collapse during geological disasters (such as earthquakes) or foundation settlement. They have gradually been phased out in modern self-built houses.
2. Poor waterproofing performance: There are gaps at the joints between panels, making them susceptible to rainwater leakage. Uneven foundation settlement can cause roof cracks to expand, further exacerbating the risk of water leakage.
3. Weak tile adaptability: If tiles are forcibly laid on the surface of prefabricated panels, an additional waterproof layer (such as felt or waterproof mortar) is required. However, panel deformation can still damage the waterproofing system, leading to tile detachment or water infiltration.

II. Structure and Tile Application of Reinforced Concrete Slab Tile Roofs

Reinforced concrete slab tile roofs use prefabricated reinforced concrete hollow slabs or cast-in-place slabs as the base layer, which are then covered with tiles to meet fire prevention, aesthetic, or waterproofing requirements. Their construction methods can be divided into two categories:

1. Tile laying on a felt base layer: A felt waterproofing layer is laid on the roof leveling layer, and the felt pressing strips and tile hanging strips are fixed with wooden wedges before laying the tiles. This method is suitable for flat roofs or roofs with a small slope, but the felt is prone to aging and requires regular maintenance.
2. Tile laying with waterproof mortar: Waterproof cement mortar is directly applied to the roof slab, and the tiles are pasted onto the surface. This method is commonly used in antique-style buildings, offering simple construction and strong integrity. However, it is essential to ensure a reasonable mortar mix ratio to avoid cracking. Note: The tiles on such roofs serve only as decorative or auxiliary waterproofing layers, with the core load-bearing and waterproofing functions still provided by the reinforced concrete slab, which is fundamentally different from the structural logic of prefabricated panel roofs.

III. Modern Preferred Material: The Alternative Advantages of Fully Vitrified Ceramic Tiles

For higher performance, fully vitrified ceramic tiles can be chosen as an alternative to traditional cement tiles or clay tiles. Their advantages include:

1. Strong weather resistance: Resistant to freeze-thaw cycles and corrosion, adapting to extreme climates;
2. Self-cleaning and maintenance-free: The smooth surface is less prone to dust accumulation or moss growth;
3. Excellent waterproofing performance: With extremely low water absorption, the risk of rainwater penetration is reduced. However, it must be clarified: Fully vitrified ceramic tiles still need to be used in conjunction with the structural system of reinforced concrete slab tile roofs and cannot be directly applied to prefabricated panel roofs, as they cannot resolve structural safety hazards.