I.Overview: Absolutely possible, and the best solution for “life extension”
Not only can they be repaired, but they must be. Many early residential houses and commercial buildings lack ring beams (Balok Ring) and structural columns (Kolom Praktis), leaving their structures in a “loose” state. Using modern seismic retrofitting (Retrofitting) techniques, a complete seismic-resistant framework can be implanted into the building without demolishing the original walls, elevating its safety from “prone to collapse at any moment” to meeting national safety certification (SLF) standards.
II. The “Three Fatal Flaws” of Old Brick-Concrete Houses
Lack of integrity: Walls are not interconnected, making them behave like stacked blocks during earthquakes and highly susceptible to story collapse.
Foundation sensitivity: Due to soil softening during the rainy season, walls without ring beams are highly prone to developing continuous “chevron cracks” or diagonal cracks.
Brittle failure: Bricks bear the load directly, losing stability once cracked and lacking any secondary defense capability.
III. Professional Reinforcement “Three-Step Approach”: Transforming from “Loose Assembly” to “Integrated Whole”
Step One: Lock the Foundation to Eliminate the “Root Cause of Cracking”
Diagnosis: 90% of cracks in old houses originate from the foundation.
Solution: Use micropiles or pressure grouting to penetrate the shallow soft soil.
Effect: Ensures the house no longer sinks or tilts. With a stable foundation, wall repairs become meaningful.
Step Two: Reinforce Walls to Eliminate “Brittle Risks”
Structural Grouting: For through cracks, use epoxy for high-pressure injection to restore wall continuity.
Wiremesh: Install wiremesh on both sides of the old wall and spray high-grade shotcrete.
Effect: Equivalent to putting “bulletproof armor” on fragile brick walls, providing them with strong shear resistance.
Step Three: Add an External “Framework” to Compensate for Core Deficiencies
This is the essence of old house reinforcement, requiring no major demolition or reconstruction:
External Tie Columns: At the corners of the house and the junctions of long walls, reinforced concrete columns are “bound” to the exterior of the original wall using chemical anchoring technology.
External Ring Beams: At the edges of floor slabs or the top floor, encircling reinforcement beams are constructed along the exterior walls.
Effect: The newly added ring beams and structural columns tightly “bind” the loose walls together, forming a complete load-bearing system that meets the seismic requirements of SNI 1726.
IV. Actual Benefits After Reinforcement
Earthquake Resistance Compliance: Capable of withstanding earthquakes ranging from 5.0 to 7.0 magnitude, common in Indonesia. Even during intense tremors, the structure ensures “damage without collapse,” providing crucial time for evacuation. %% Legalization of Assets: After reinforcing the framework and obtaining certification, you can apply for an SLF (Functional Compliance Certificate) from the government, granting old houses legal eligibility for rental, business, and mortgage purposes. %% Expandable Space: With the strengthened structural support, originally non-extendable brick-concrete buildings can now add floors or rooftop expansions, doubling the usable area.
资产合法化： 补齐骨架并经过鉴定后，可以向政府申请 SLF（功能合格证），让老房子具备合法的出租、经营和抵押资格。
空间可扩展： 有了增强的骨架支撑，原本无法加层的砖混房可实现加层或楼顶拓展，面积翻倍。
Low cost: Compared to demolition and reconstruction (which requires paying for demolition, waste disposal, new building permit applications, and reconstruction fees), the comprehensive cost of reinforcement is typically only 30%-50% of rebuilding.
5. Expert Reminder: The “Red Line” in Old House Renovation
Avoid “fake reinforcement”: Many construction crews merely fill cracks with ordinary cement. Remember, repairs without steel mesh or additional columns cannot withstand seismic forces—cracks will inevitably reappear once the rainy season arrives.
Pay attention to pipeline safety: Old houses often have severely aged pipelines. During reinforcement, it’s essential to simultaneously organize the pipelines (Re-wirering/Plumbing) to eliminate fire and water leakage hazards.
6. Summary
A “crumbling” old house doesn’t necessarily need demolition. As long as the “bones” are properly reinforced, an old house can become a fortress. Through a combination of “foundation reinforcement + wall strengthening + external framework,” we can breathe new life into old houses that lack seismic structures due to historical reasons. This is not only about preserving property but also respecting life.
Considering the condition of your old house, would you like us to conduct a complimentary “initial diagnosis for structural deficiencies” using professional detection equipment?