How to Repair the Ground of a Mobile Toilet

The repair of the ground in a mobile toilet should be carried out with targeted measures based on the extent of damage and renovation needs. The core principle is to ensure ground flatness and waterproofing performance. It is recommended that professional personnel handle any pipeline modifications.

I. Minor Crack Repair

If only fine cracks (width ≤ 5mm) appear on the ground, first clean the dust and debris inside the cracks to ensure there are no loose particles. Use specialized ground repair materials (such as epoxy resin or polymer cement-based repair agents) to fill the cracks. During filling, compact the material in layers, with each layer not exceeding 3mm in thickness, ensuring the repaired surface is flush with the original ground. After repair, allow it to stand for more than 24 hours until the material is fully cured before use, to avoid secondary cracking caused by trampling.

II. Repair of Larger Area Damage

When there is extensive damage to the ground (such as broken tiles or loose sub-base), the original tiles need to be removed. Use professional tools (such as an electric pick) to gradually pry along the edges of the damaged area, avoiding damage to the surrounding intact structure. After removal, check the flatness of the sub-base. If there are uneven areas, use cement mortar to level it, controlling the thickness error within ±2mm. When relaying tiles, choose materials with good anti-slip properties (such as anti-slip glazed tiles or full-body tiles) and use waterproof tile adhesive for bonding to ensure a firm bond. After laying, use a level to check the flatness, control the gap width between 1.5-3mm, and finally fill the gaps with grout to prevent water seepage.

III. Repair in Special Renovation Scenarios

If the repair involves relocating the toilet, choose the treatment method based on the drainage type:

• Inter-floor Drainage: When using a toilet offset connector, chisel out the ground floor slab to a depth of 20-40mm, embed the offset connector, and then reapply a waterproof layer. The waterproof layer should use polyurethane coating or membrane, with a height of at least 20mm, covering a 50cm area around the offset connector. After the waterproof layer dries, conduct a closed-water test (持续24小时无渗漏, which means no leakage for 24 consecutive hours), and finally lay tiles.
• Sunken Drainage: The toilet position can be adjusted by lowering the floor slab (by 250-350mm) or raising the floor (by building a 180-200mm base). After lowering or raising, reapply a waterproof layer using the same materials as for inter-floor drainage, and ensure the drainage slope meets the standard (sloping towards the floor drain, with a slope ≥ 1%). After the waterproof layer passes inspection, lay anti-slip tiles and perform proper grouting.

Precautions: All repair processes must strictly follow construction specifications, especially for waterproof layer treatment and closed-water testing. If pipeline modifications are involved (such as relocating drainage pipes), it is recommended to contact professional plumbers to avoid leakage or poor drainage caused by improper installation.