Renovation of Prefabricated Slab Houses at Home

The renovation of prefabricated slab houses at home requires comprehensive consideration from multiple aspects, including structural safety, construction handling, and functional upgrades, as detailed below:

I. Structural Safety Assessment and Reinforcement
Before renovation, it is essential to commission a professional team to conduct a comprehensive structural safety assessment, focusing on inspecting the crack width of the prefabricated slabs (special treatment is required if the width exceeds 0.3 millimeters) and the connection status with the ring beams (bolts with a rust rate exceeding 30% need to be replaced). According to data from the Ministry of Housing and Urban-Rural Development, approximately 60% of old prefabricated slab buildings can have their lifespans extended through reinforcement, avoiding the waste of resources associated with complete demolition and reconstruction. Reinforcement measures include:

1. Slab Joint Treatment: Remove the original filling material, implant No. 6 deformed steel bars, and then pour C30 fine aggregate concrete to enhance the connection strength between slabs.
2. Addition of Structural Columns: Install 240*240-millimeter structural columns at the four corners of the house, using No. 6 and No. 8 steel bars for reinforcement and connecting them to the floor slabs to improve overall stability.
3. Roof Renovation: After removing the original wooden roof, recast a concrete roof to ensure waterproof performance and structural durability, while providing a foundation for subsequent roofing material installation.

II. Construction Process Specifications

1. Temporary Support System: Set up steel pipe supports every 1.2 meters along the length of the prefabricated slabs, and use H-shaped steel beams with a cross-section of no less than 200*200 millimeters for critical node underpinning to prevent structural instability during demolition.
2. Demolition Sequence: Follow the principle of 'middle first, then sides,' with a daily demolition volume not exceeding 30% of the total floor area. Continuously monitor the stress changes in the support system, and prohibit the use of heavy hammers for impact demolition to avoid shocks to the foundation.
3. Exterior Wall Treatment: After removing the original exterior wall tiles, perform plastering and steel bar grouting to enhance the load-bearing strength and tensile properties of the walls, providing a stable base for subsequent decoration.

III. Functional Upgrades and Optimization

1. Sound Insulation Improvement: To address the poor sound insulation of prefabricated slab houses, install sound insulation panels and replace windows with double-glazed units, which can improve sound insulation by up to 70%.
2. Space Renovation: According to modern living needs, replan the interior layout, add elevators, or optimize traffic flow design to enhance living comfort.
3. Material Upgrades: For exterior wall plastering, choose environmentally friendly and durable materials. For roofing, select new materials based on waterproofing requirements to extend the building's service life.

During the renovation process, it is crucial to strictly adhere to specifications to ensure structural safety and construction quality, while also considering functionality and cost-effectiveness to achieve sustainable utilization of old houses.