Wall Leakage in Prefabricated Panel Houses

Wall leakage in prefabricated panel houses, with joints being a common leakage point, can be addressed through the following measures:

Asphalt Treatment

Melt asphalt into a liquid state and pour it over the leaking prefabricated panels. Advantages: Asphalt has excellent waterproofing properties, and the construction process is relatively simple, requiring no complex equipment or specialized technical skills. Disadvantages: The lifespan is limited, and leakage may recur after approximately three years. This is because asphalt gradually ages and cracks under the influence of long-term temperature changes, ultraviolet radiation, and minor structural deformations of the house, thereby losing its waterproofing effectiveness.

Adding a Layer of Tiles

Install a layer of tiles on top of the prefabricated panels to create an additional waterproof layer. Advantages: This method provides good waterproofing performance, as the tiles can block direct rainwater impact and are highly durable, offering a relatively long service life. Disadvantages: The cost is relatively high, as it requires purchasing tiles and paying for higher construction fees. Additionally, the construction process is more complex, requiring consideration of tile laying patterns, fixing methods, and integration with the existing structure.

Using Professional Waterproofing Materials

Recommend the use of polymer cement-based waterproof coatings/slurries. Advantages: These materials are non-toxic and harmless, friendly to humans and the environment; easy and quick to apply, requiring no complex construction techniques; they bond tightly with cement-based substrates, forming a robust waterproof layer; and they have a long service life with strong waterproofing effects. Construction Method: First, prepare the substrate surface where waterproofing is to be applied, ensuring it is firm, level, and clean. Then, use a brush or roller to evenly apply the waterproofing material to the surface, typically requiring two coats with each coat not exceeding 1mm in thickness. Pay special attention to rounding the corners of walls before application, and use sleeves for pipes passing through walls, filling the holes with leak-stopping compound.

Conducting a Water Test

After applying the waterproof coating to form a waterproof layer, fill with water to a height of 20cm and inspect after 24 to 48 hours for any significant reduction in water level or wet spots on the ceiling below to ensure successful waterproofing construction.

Protecting the Waterproof Layer in Later Stages

During subsequent renovation work, take care to avoid damaging the completed waterproof layer, such as by not nailing or drilling into it.