A real estate developer in Jakarta, Indonesia, was constructing a 30-story residential tower with tight 6-day-per-floor cycle requirements. They faced several limitations with their existing formwork approach:
Heavy component weight — traditional all-aluminum panels (28–32 kg/m²) required two workers or crane assistance, slowing placement
High inventory cost — need to stock separate wall and slab panel sets
Limited design flexibility — fixed all-aluminum panels made irregular wall openings and corners difficult
Condensation issues — solid aluminum panels caused concrete surface blistering in tropical humidity
They needed a lightweight, hybrid formwork system combining aluminum strength with plywood versatility — specifically an aluminum frame formwork solution.
We supplied an aluminum frame formwork system — aluminum perimeter frames with replaceable plywood faces. This hybrid design offers the best of both materials.
Key technical specifications:
| Specification | Detail |
|---|---|
| Frame material | Extruded aluminum 6061-T6 |
| Face material | 12–18mm phenolic film faced plywood (WBP glue) |
| Panel weight | 18–22 kg/m² (vs. 28–32 kg/m² for solid aluminum) |
| Frame depth | 80–120mm ribbed profile |
| Connection system | Pin-wedge or quick-lock cam lever |
| Max concrete pressure | 60–70 kN/m² |
Core technical advantages:
Lightweight construction — aluminum frame provides structural rigidity while plywood face reduces overall weight by 30–40%
Replaceable plywood face — when the plywood wears after 30–50 pours, only the face needs replacement, not the entire panel
Superior concrete finish — plywood face absorbs moisture, preventing surface blistering common with solid aluminum in humid conditions
Field-cuttable — plywood face can be cut on-site for irregular openings, window reveals, and penetrations
Lower thermal conductivity — plywood face reduces concrete surface temperature differential vs. solid aluminum
On-site deployment:
3,500 m² of aluminum frame formwork delivered for core walls, shear walls, and columns
Integrated slab formwork using same frame components (drop-head system compatible)
3 complete floor cycles rotating for continuous pour schedule
| Metric | Solid Aluminum Formwork | Aluminum Frame Formwork | Improvement |
|---|---|---|---|
| Panel weight per m² | 28–32 kg | 18–22 kg | 30–40% lighter |
| Labor required per floor | 6 workers | 4 workers | 33% fewer |
| Crane dependency | Frequent (panels >25kg) | Minimal (hand-carried) | Faster placement |
| Concrete surface blistering | Occurs in humid climate | None (plywood breathes) | Zero rework |
| Component repair cost | Replace entire panel (high) | Replace plywood only (low) | Lower lifecycle cost |
| Wall opening adaptability | Pre-fabricated only | Field-cuttable | Faster modifications |
Financial impact:
Labor cost per floor: reduced by 40% (from 6 to 4 workers * 3 days)
Cycle time: 5 days per floor (met the 6-day requirement)
Panel maintenance cost over 100 uses: 35% lower than solid aluminum
For projects requiring both speed and flexibility, aluminum frame formwork delivers unique advantages:
Lighter = Faster handling
18–22 kg/m² means one worker per panel (vs. two for solid aluminum)
No crane needed for typical wall panels — speeds up placement by 25%
Replaceable face = lower long-term cost
When plywood wears (typically 30–50 uses), replace only the face
Aluminum frame lasts 150–200+ uses with periodic face replacement
Better concrete finish in humid climates
Solid aluminum can trap condensation against fresh concrete
Plywood face allows vapor transmission, eliminating blistering and pinholes
On-site flexibility
Cut plywood face for window openings, MEP penetrations, or irregular corners
No need to order custom pre-fabricated panels
Lower initial investment
Aluminum frame formwork typically costs 15–25% less than solid aluminum systems
Faster payback period for contractors
| Factor | Traditional Timber | Solid Aluminum | Aluminum Frame |
|---|---|---|---|
| Weight per m² | ~25 kg | 28–32 kg | 18–22 kg |
| Reuse cycles (frame/face) | 5–10 | 80–120 | 150+ / 30–50 |
| Face replacement cost | N/A (dispose entire panel) | Replace entire panel | Replace plywood only |
| Concrete finish | Good | Excellent (but blistering risk) | Excellent + no blistering |
| Field modifiable | Yes (cut plywood) | No | Yes (cut plywood face) |
| Best application | Low-rise, custom | High-rise repetitive | High-rise + irregular layouts |
Solid aluminum formwork has high thermal conductivity and is non-porous. In hot, humid conditions, temperature differential between cool formwork and warm concrete causes surface condensation. This moisture becomes trapped against non-porous aluminum, creating surface blisters.
Plywood-faced aluminum frames solve this:
Plywood has lower thermal conductivity (slower temperature equalization)
Plywood is slightly porous, allowing minimal vapor escape
Result: zero blistering, even in Jakarta's tropical humidity
Switching to Aluminum Frame Formwork enabled this Jakarta developer to reduce panel weight by 35%, cut labor by 40%, and achieve 5-day floor cycles. The hybrid design — aluminum frame + replaceable plywood face — delivered the strength of aluminum with the finish quality and field adaptability of plywood. For high-rise projects in humid climates or with irregular layouts, aluminum frame formwork is the optimal choice.
Ready to lighten your formwork and accelerate your next tower?
Contact us for a free aluminum frame formwork layout design and quote
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