Is Tiling Suitable for Prefabricated Slab Houses?

Tiling a prefabricated slab house is not entirely infeasible, but it requires careful handling, especially for older houses that have been in use for 30 years, as directly laying tiles poses significant risks.

I. Risks of Direct Tiling

The floor slabs in prefabricated slab houses are mostly prefabricated hollow slabs with large spans and noticeable elasticity. In houses that have been in use for 30 years, the prefabricated slabs may suffer from aging, steel bar corrosion, and structural deformation. Directly laying tiles can lead to uneven stress on the tiles due to the elasticity of the floor slab, accelerating the aging of the prefabricated slabs, and subsequently causing issues such as softening, bulging, and cracking of the floor tiles. In severe cases, long-term vibration may even cause the tiles to fall off, posing safety hazards.

II. Reinforcement Solutions

If tiling is necessary, the prefabricated slabs must first be reinforced. Common methods include:

1. Reinforcement with Reinforced Concrete: Add two small beams beneath the prefabricated slabs, with the beams intersecting the slabs in a '+' shape. By drilling holes in the slabs and pouring concrete through grouting, the overall load-bearing capacity of the floor slab can be enhanced. This method is suitable for local reinforcement but requires precise construction to avoid damaging the original structure.
2. Steel Beam Support Reinforcement: Install steel beams inside the house as supports. Accurately position the steel beams on both side walls and ensure they fully adhere to the bottom of the prefabricated slabs through supports. Steel beams can effectively disperse the load on the floor slab and are suitable for rooms with large spans. However, attention must be paid to the secure connection between the steel beams and the walls.

III. Key Inspections and Treatments Before Construction

1. Floor Slab Condition Assessment: Focus on inspecting cracks and deformations in the floor slab. For older houses, check for issues such as steel bar corrosion and concrete spalling. If there is overall deformation or severe steel bar corrosion, immediately halt the tiling plan and consider overall renovation.
2. Base Treatment: Thoroughly clean dust and oil stains from the floor slab surface and fill in pits to ensure a flat base. Flexible materials (such as foam sealant or glass glue) should be used to fill the joints between prefabricated slabs to prevent tile cracking due to stress concentration at the joints.
3. Professional Confirmation: Before tiling an older prefabricated slab house, it is advisable to commission a structural engineer to conduct an on-site assessment to confirm whether the load-bearing capacity of the floor slab meets the requirements for tiling, avoiding structural damage caused by blind construction.