Alpine Spec Collections
Engineered Aluminium Systems for Swiss Architecture
Explore our top-tier precision fenestration portfolio. Certified to European EN 14351-1 criteria, providing high wind-load resistance, acoustic isolation, and ultra-low thermal transmittance.
Information Gain · Swiss Engineering
Meeting SIA 331 & Minergie Requirements for Cottage Architecture
Exporting cottage windows to Switzerland demands far more than traditional rustic appeal. The Swiss alpine and plateau climates feature extreme temperature deltas, intense wind pressure from valley vortexes, and rigorous cantonal energy regulations governed by SIA 331 (Windows and French Doors) and national Minergie-P criteria.
Traditional wooden cottage windows suffer from timber contraction, rot, and moisture degradation under heavy Alpine snowloads. DERCHI bridges this heritage aesthetic gap with high-performance extruded 6063-T6 architectural aluminium. By incorporating advanced polyamide PA66 thermal barrier strips (24mm–34mm) and warm-edge TGI spacers, our aluminium cottage window systems deliver whole-window thermal transmittance values down to Uw ≤ 0.80 W/(m²·K).
Swiss Altitude Pressure Equalisation
Capillary valves integrated into insulating glass units (IGUs) to prevent pane deflection between sea-level export and high alpine cantons (e.g., Valais, Graubünden).
Heritage Mullion Configurations (Wiener Sprossen)
Authentic cottage bar grids with duplex spacers, replicating historic Swiss architectural profiles while preserving clean exterior thermal breaks.
| Performance Metric | Swiss / EN Standard | DERCHI Engineering Capability |
|---|---|---|
| Thermal Insulation (Uw) | SIA 380/1 / Minergie | Uw 0.78 – 1.1 W/(m²·K) (Triple Low-E) |
| Air Permeability | EN 12207 | Class 4 (Highest Tightness Rating) |
| Water Tightness | EN 12208 | Class E1200 (1200 Pa Extreme Driving Rain) |
| Wind Load Resistance | EN 12210 | Class C5 / B5 (SIA Alpine Gale Compliant) |
| Burglar Resistance | EN 1627 | RC2 & RC3 Multipoint Hook Locking |
| Acoustic Decibel Rating | SIA 181 | Rw 42 dB – 48 dB (Laminated Acoustic Glass) |
Application Scenarios
Engineered Across Diverse Swiss Architectural Typologies
From heritage lakeside villas in Lucerne to contemporary chalets in Zermatt, our custom fenestration solves complex regional microclimate and structural demands.
Modern Chalets & Alpine Lodges
Engineered to resist the compressive weight of continuous snow packs and sub-zero temperatures. Features structural thermally broken aluminium sash profiles paired with triple argon-filled glazing that eliminate interior condensation and cold draft transmission.
Heritage Restorations & Engadin Estates
Switzerland maintains strict historical preservation codes (Heimatschutz). Our ultra-slim cottage window sashes, micro-beveled exterior frames, and custom Swiss architectural colors deliver the traditional artisan aesthetic without sacrificing modern energy efficiency.
Lakeside Residences (Zurich, Geneva, Lugano)
Demands maximized panoramic sightlines paired with high saline and humidity resistance. Our Qualicoat Seaside-grade fluorocarbon coatings and precision multi-point perimeter seals prevent frame degradation and water ingress under gale-force squalls.
Market Intelligence
Swiss Fenestration Trends: The Transition to High-Performance Aluminium
Decarbonisation and Life-Cycle Durability
Swiss builders are moving away from PVC and unclad wood profiles due to short replacement cycles and VOC concerns. Architects across Zurich and Basel increasingly mandate circular building products. DERCHI uses prime, 100% recyclable billet aluminium, ensuring our window assemblies align with Swiss 2050 net-zero targets and longevity metrics exceeding 40+ years.
Smart Glazing & Concealed Hardware
Minimalist cottage aesthetics now merge with concealed tilt-and-turn hardware (Verdeckt liegende Beschläge) and integrated micro-ventilation systems. Swiss buyers seek flush interior appearances combined with motor-driven concealed trickle vents to maintain strict indoor air quality (SIA 180) standards without disrupting visual harmony.
Production Base
180,000m²
State-of-the-art intelligent manufacturing facility in Foshan.
Manufacturing Mastery
25+ Years
Pioneering high-precision architectural doors and windows.
Workforce Scale
600+
Skilled master technicians and dedicated facade engineers.
Patents & Audits
100+
Global certifications including CE, ISO 9001, AS 2047, and NFRC.
Why Partner With DERCHI
Direct-From-Manufacturer Engineering for Swiss Contractors
We combine expansive industrial manufacturing capacity with bespoke architectural precision, lowering procurement costs while upholding strict European standards.
Rigorous European Quality Control
Manufactured under strict ISO 9001 protocols. Each window assembly undergoes factory pre-assembly, laser corner-angle verification, multi-point lock testing, and air/water chamber checks before crating.
Free CAD & BIM Engineering Support
Our in-house design office transforms architectural sketches into detailed cross-section CAD shop drawings, glass calculation schedules, and structural anchor specifications tailored to Swiss timber, concrete, or stone subframes.
Certified Alpine Export Packaging
All units are packed in reinforced, fumigated steel-corner wooden crates with edge protectors and moisture barrier films. We coordinate consolidated multimodal shipping directly to Swiss customs points and job sites.
Procurement Inquiries
Frequently Asked Questions by Swiss Buyers
Clear technical and commercial answers for architects, general contractors, and developers importing from DERCHI into Switzerland.
Can your aluminium cottage windows comply with cantonal energy laws (MuKEn)? +
Yes. The Mustervorschriften der Kantone im Energiebereich (MuKEn) requires stringent window performance, typically demanding whole-window values of Uw ≤ 1.0 W/(m²·K). DERCHI utilizes customized multi-chamber thermal breaks and triple-pane low-emissivity glass configurations (4Low-E + 16Ar + 4 + 16Ar + 4Low-E) paired with Swisspacer warm-edge technology to achieve Uw values down to 0.80 W/(m²·K), comfortably surpassing MuKEn standards.
How do you handle altitude differences and risk of glass implosion in Swiss mountains? +
Because our production base operates near sea level, shipping sealed insulating glass units (IGUs) to high-altitude Swiss regions (such as St. Moritz, Davos, or Verbier) creates extreme barometric pressure differentials that can cause outer glass pane deflection or seal rupture. We equip all Swiss-bound IGUs with factory-calibrated capillary tubes or pressure equalization valves, allowing the airspace to equalize upon arrival at destination elevation before final sealing.
Do your windows meet Swiss RC2 / RC3 burglar resistance standards? +
Yes. Security is a primary requirement for Swiss residential builds. Our cottage window assemblies can be specified with German Siegenia or Roto multipoint mushroom-cam locking hardware, heavy-duty anti-jemmy corner strikes, lockable handles rated at 100 Nm torque resistance, and P4A / P5A laminated security glass according to EN 356, delivering fully verifiable RC2 and RC3 burglar resistance.
What surface finish options are available to match traditional Swiss wood grain? +
We provide advanced 3D sublimated wood-grain finishes that perfectly mimic Swiss larch (Lärche), oak (Eiche), and alpine pine, offering authentic timber warmth with zero maintenance. For modern applications, we offer over 200 standard RAL colours with certified Qualicoat Class 2 hyper-durable powder coating, providing superior UV resistance against intense alpine sunlight.
What documentation do you provide for Swiss building authority approval? +
Every shipment includes an official CE Declaration of Performance (DoP) under EN 14351-1, verified thermal calculation certificates (EN ISO 10077-1/2), mill test certificates for 6063-T6 aluminum alloys, and precise shop drawings stamped by our engineering department for cantonal building permit (Baubewilligung) filing.
Ready to Specify Your Swiss Cottage Project?
Consult with our facade engineering specialists. Get comprehensive CAD shop drawings, Uw value thermal calculations, and competitive factory-direct pricing tailored to Swiss construction specifications.
Custom SIA 331 Engineering
Free Project CAD Drawings
Direct Multimodal EU Delivery