Tianmen Prefabricated Slab Housing

Here is information about prefabricated slab housing in Tianmen:

Housing Structure Characteristics

Prefabricated slab structures are widely used in housing in the Tianmen area. Common types include six-story brick-concrete commercial and residential buildings with prefabricated slab floors, as well as two-story brick-concrete residential buildings that also use prefabricated slab roofs. These structures are formed by assembling prefabricated concrete slabs to create floors, offering high construction efficiency and lower costs, but requiring attention to waterproofing at the slab joints.

Roof Leakage Issues

Leakage Point Locations:
Leakage in prefabricated slab roofs typically does not originate from the slabs themselves but is concentrated in three areas:

1. Slab Joints: Gaps can form at the joints between prefabricated slabs due to construction errors or long-term thermal expansion and contraction.
2. Junction with Parapet Walls: Cracks can develop where the roof meets vertical walls due to differences in material shrinkage.
3. Roots of Embedded Pipes and Fittings: Areas where pipes such as chimneys and drainage pipes penetrate the slabs are prone to leakage as the sealing materials age.

Causes of Leakage:
Prefabricated slabs undergo stress deformation due to temperature changes, making it difficult for ordinary waterproof coatings or single-layer membranes to adapt to this expansion and contraction over the long term, leading to coating cracks or membrane delamination. Therefore, simply applying surface coatings cannot fundamentally solve leakage issues; scientific substrate treatment and stress-buffering design are required.

Key Points for Selecting Repair Services:
The rainy season in Tianmen is concentrated, and leakage problems are prominent during the flood season. When selecting repair services, homeowners should focus on examining the following aspects:

• Technical Experience: Professional companies should master stress-buffering techniques, such as filling gaps with elastic sealing materials and adding polyester or non-woven fabric as buffer layers.
• Material Quality: Use genuine national standard waterproof materials to ensure weather resistance and anti-aging properties.
• Construction Qualifications: Prioritize selecting正规 (formal/licensed) companies with relevant qualifications.
• After-Sales Guarantee: Clarify the warranty period and scope of responsibility to avoid later disputes.

Housing Appraisal Conditions

Structural Safety Appraisal:
For older prefabricated slab buildings (such as a six-story commercial and residential building constructed in 1997), if the structural design is reasonable and stability is good, there are usually no significant structural safety hazards. However, regular inspections of the prefabricated slab flat roofs are necessary, focusing on issues such as aging of the waterproof layer and cracks in the slabs, to ensure timely maintenance and safety.

Housing Danger Appraisal:
Some two-story brick-concrete prefabricated slab buildings have been appraised on-site and classified as Grade D (dangerous buildings) according to the Standards for Appraisal of Dangerous Buildings (JGJ 125-2016). These buildings have severe damage to their foundations, foundations, or superstructures, and it is recommended that they be demolished and rebuilt to avoid safety accidents from continued use.