Chengdu Prefabricated Slab House Renovation

When renovating prefabricated slab houses in Chengdu, special attention should be paid to waterproofing issues, with the core being to address three major hazards: basin humidity, water seepage through slab joints, and water accumulation in backfill layers, and to select appropriate waterproofing techniques and renovation companies.

I. Key Waterproofing Issues in the Renovation of Prefabricated Slab Houses in Chengdu

1. High Basin Humidity: Chengdu has a humid and rainy climate, with high moisture content in walls and floor slabs. If waterproofing is inadequate, moisture can easily penetrate through slab joints, leading to wall skin bulging, mildew, and even peeling.
2. Slab Joint Problems in Prefabricated Floor Slabs: Old residential areas have natural gaps in the joints of prefabricated slabs. If only single-layer waterproofing is applied or construction is incomplete, water can seep horizontally to adjacent rooms or downstairs, causing leakage disputes.
3. Backfill Hazards in Bathrooms: If there is no secondary drainage in the backfill layer, long-term water accumulation can lead to downward seepage or upward moisture, causing persistent odors in the bathroom and even damaging the floor slab structure.

II. Targeted Waterproofing Techniques

1. Double Waterproofing for Walls and Floors:
   • Waterproofing for kitchen, bathroom, and balcony walls should be thorough, with a recommended waterproofing height of ≥1.8 meters in shower areas to prevent horizontal moisture spread.
   • The waterproofing layer should be free of sand holes, have qualified drainage lines, and straight edges, with special attention paid to dead corners such as slab joints and internal and external corners.
2. Secondary Drainage + Waterproofing Inspection Port in Backfill Layer:
   • Reserve an inspection port in the bathroom backfill layer for timely detection of leaks; a secondary drainage system can guide accumulated water out, preventing long-term waterlogging.

III. Suggestions for Selecting Renovation Companies

1. Chengdu Lilin Design Studio:
   • Specializing in residential renovation for 16 years, adopting a 'renovation before payment' model with payments made after five-stage acceptance checks and itemized quotes with no additional charges.
   • Skilled in replacing old pipelines and redoing bathroom waterproofing, offering a 5-year warranty for concealed electrical and plumbing work, a 2-year warranty for basic hard finishes, and lifetime maintenance consultations.
2. Chengdu 80s Renovation Team:
   • A pure construction team with uniform craftsmanship standards, using national standard electrical and plumbing work and double-layer waterproofing for old house renovations.
   • Settlement upon completion of each sub-project, offering a 3-year warranty for the entire house's hard finishes, a 6-year warranty for concealed work, and lifetime cost-price maintenance.

Conclusion: The renovation of prefabricated slab houses in Chengdu should focus on waterproofing as the core, addressing humidity and water seepage issues through techniques such as double waterproofing and secondary drainage, and selecting qualified renovation companies with reliable after-sales service to ensure renovation quality and long-term safety of use.