GEAK / CECB and Minergie | SerVilla
GEAK/CECB is the cantonal energy label, addressing the envelope, building technology and direct CO₂ emissions. Minergie is a separate route.
GEAK / CECB and Minergie in Steel Frame Construction
Key Questions for Project Evaluation
Which document is required in the canton and project context? Is an additional Minergie service requested?
Applicable Countries & Adoption for GEAK / CECB and Minergie
European countries where this standard serves as a statutory code, subsidy benchmark, or accredited green label:
Performance Benchmarks & Criteria for GEAK / CECB and Minergie
Cantonal energy label| Performance Parameter | Benchmark Target | Steel Envelope Methodology |
|---|---|---|
| Space Heating / Cooling Demand | ≤ 15 – 35 kWh/m²a | Continuous exterior mineral wool wrap + triple glazing |
| Airtightness (n50) | ≤ 0.60 – 1.00 h⁻¹ (50 Pa) | Variable vapor control membrane & continuous taping |
| Thermal Bridge Coefficient (Psi) | Ψ ≤ 0.010 W/mK | Continuous exterior insulation wrapping CFS frame completely |
| Mechanical Ventilation (MVHR) | ≥ 75% – 85% Recovery | Acoustically insulated MVHR system with F7 fine filtration |
| Summer Comfort / Overheating | ≤ 10% (> 25°C) | Exterior motorized solar blinds & architectural roof overhangs |
Delivery Packages Compatibility for GEAK / CECB and Minergie
Required procurement scope and on-site interfaces to secure compliance with this standard:
P1 Structural Frame
Supplies precision CFS steel frame and certified Eurocode statics dossier. Thermal insulation, airtight membranes, and high-performance fenestration must be procured and executed by your local site contractor.
P2 Frame + Cavity Insulation
Includes structural steel studs, cavity rockwool infill and exterior structural sheathing. Meeting the stringent benchmark U-values of this standard requires additional continuous exterior rockwool wrap on site.
P3 Weather-Tight Envelope
The SWEET SPOT for Passive House & statutory low-energy standards. Features continuous exterior insulation wrap (U <= 0.11-0.14 W/m²K), certified triple-glazed fenestration, and airtight junction details securing n50 <= 0.60 h⁻¹.
P4 Complete Turnkey Kit
Includes full P3 thermal envelope plus certified 85%+ MVHR ventilation unit, heat pump readiness, interior drywall lining assemblies, and sanitary/electrical rough-in components for 100% turnkey compliance.
International Green Building Finance & ESG Capital
Cold-formed steel homes certified to this performance benchmark qualify for European green mortgage products and command a 15-25% premium in market liquidity and asset preservation.
Certification & Verification Roadmap for GEAK / CECB and Minergie
PHPP or statutory calculation prepared with plot coordinates, solar azimuth, and local weather files.
Target U-values specified with exterior rockwool thickness and triple-glazed warm-edge fenestration.
ISO 9972 pressure test and IR thermography physically verify airtightness threshold n50 <= 0.60 h⁻¹.
Third-party certified audit dossier submitted for official energy efficiency and green mortgage registration.
Why Cold-Formed Steel for GEAK / CECB and Minergie?
Steel frame does not shrink, twist or warp, ensuring airtight seals and tape junctions remain permanently intact.
Windows and panel interfaces are roll-formed to 0.5 mm tolerance, preventing unplanned thermal leaks on site.
Galvanized steel is impervious to rot, mold, fungi and termites, securing building biology credentials.
Building Physics & Technologies for Standard Compliance
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Frequently Asked Questions
Essential answers regarding steel construction, energy targets and project delivery.
Yes. With exterior continuous insulation eliminating thermal bridging, certified triple-glazed windows, airtight membranes, and heat recovery ventilation (MVHR), steel homes achieve full Passive House standards.
Thermal bridging is prevented by external continuous insulation wrap, thermal-break tape on structural connections, and decoupling outer claddings from interior framing.
Passive House requires n50 <= 0.6 h-1 on Blower Door testing. Our envelope design incorporates continuous vapor control membranes taped at all seams.
Minergie is a Swiss quality label focusing on energy efficiency and indoor comfort with specific primary energy criteria, while Passivhaus has strict heating demand caps (15 kWh/m²a).
Official building certifications are issued by accredited third-party certifiers (e.g. Passive House Institute, Minergie Agency, DGNB) upon submission of calculations and test results.
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