1.OverviewIt’s not just about “repair,” but also a “performance leap.”
Absolutely stronger. As long as the project is implemented according to formal governance standards, the reinforced house will undergo a qualitative leap in seismic resistance, structural stability, and load-bearing capacity. In fact, old houses retrofitted with modern reinforcement technologies often have better safety performance than many ordinary newly-built residential houses (Rumah Biasa) without seismic design.
2. Why does a reinforced house undergo a “qualitative change”?
We will conduct comparative upgrades from the three weakest dimensions of the building:
⑴、Foundation: From “drifting with the tide” to “an immovable pillar”
Original state: Most old houses use shallow foundations, sitting directly on soft soil or peat soil. With changes in groundwater levels in places like Jakarta, the foundation is like stepping on a sponge, highly prone to sinking and cracking.
After reinforcement: The micropile technique is employed to anchor the foundation directly into the hard soil layer (Tanah Keras) at a depth of over ten meters.
Result: The house no longer shifts with the expansion and contraction of surface soil. Even amid construction disturbances or extreme rainstorms, the reinforced foundation remains as steady as a rock.
⑵、Structure: From “Loose Building Blocks” to “Steel Armor”
Original Condition: The old brick-masonry structure (Unreinforced Masonry) lacked ring beams and practical columns. During an earthquake, the walls would collapse outward due to insufficient reinforcement.
After Reinforcement: The missing ring beams (Ring Beam) and practical columns (Kolom Praktis) were added using rebar planting technology, while key beams and columns were strengthened with carbon fiber (CFRP) or steel cladding.
Result: The building transformed from a “patchwork of parts” into a “rigid whole.” When facing earthquakes of magnitude 6-7, the structure can absorb energy through coordinated deformation, ensuring it “does not collapse in major quakes,” with seismic performance meeting the latest SNI 1726 standard.
⑶、Durability: From “Natural Aging” to “Technological Preservation”
Original Condition: Indonesia’s high salt fog and humidity can cause concrete carbonation and steel reinforcement corrosion.
After Reinforcement: The epoxy resin (Epoxy) and carbon fiber materials used during the reinforcement process exhibit exceptional chemical stability and corrosion resistance.
Result: They not only strengthen the load-bearing capacity but also act like a protective film, sealing the original components to prevent further moisture erosion of the core steel bars, extending the building’s lifespan by 30-50 years.
III. Performance Comparison: Before Reinforcement vs. After Reinforcement
| Performance Metrics | Original old house（Old Building） | After proper reinforcement |
| Seismic resistance | Fragile, prone to brittle collapse | Complies with the latest SNI standards, exhibiting exceptional ductility |
| Foundation stability | fluctuating with the rainy season/groundwater level | Permanent settlement prevention, unaffected by shallow soil layers |
| Load-bearing capacity | Barely sustainable, unable to handle additional loads | Capable of meeting requirements for additional floors, office spaces, and storage needs |
| Crack Risk | Continuous Generation of New Cracks | Original Cracks Locked, No Recurrence |
| Legal/Financial Status | Dangerous buildings, unable to pass SLF acceptance | Safe house, asset appreciation, mortgageable and insurable |
IV. Key Reminder: Beware of the “Fake Reinforcement” Trap
If the construction team only performs the following operations, the house will not become stronger but more dangerous:
Plain Plastering (Tukang Poles): Only fills gaps with mortar without addressing the root cause of structural issues.
Adding Weight Without Reinforcement: Blindly increasing component dimensions without proper rebar anchoring merely adds to the foundation load, accelerating settlement.
Insufficient Pile Length: Pile foundations not reaching hard soil layers result in renewed tilting shortly after correction.
V. Conclusion: “Purchasing the Future” for Your Assets
Due to the complex geological environment, building safety is dynamic.
Before reinforcement: the house is “gambling” with natural disasters. After reinforcement: it becomes a fortress built through “engineering science”.
Through integrated renovations including deep foundation reinforcement, structural toughening, and material corrosion protection, the completed house is essentially a “new life” in terms of mechanical performance. Not only is it stronger than the original, but it also provides the most solid protection for you and your family in earthquake-prone Indonesia, making the property a truly enduring asset that retains and increases its value.
Expert Tip:
You can request us to provide you with a “Structural Audit Compliance Report” issued by a certified engineer (STRI/SKA) upon completion of the reinforcement. This report serves not only as scientific proof of the “strengthening” but also as the legal basis for applying to the government for the SLF (Functional Compliance Certificate).