DERCHI Soundproof Aluminum Casement Windows Low E Glass Custom
Engineered for urban noise reduction (STC 45dB) in Lisbon and Porto metropolitan zones. Features dual polyamide thermal breaks and Low-E double glazing.
Engineered to rigorous EU standards (EN 14351-1, CE Certified), offering superior thermal isolation (Uw ≤ 1.1 W/m²K), structural wind-load safety, and advanced solar control for Portugal's microclimates.
Engineered for urban noise reduction (STC 45dB) in Lisbon and Porto metropolitan zones. Features dual polyamide thermal breaks and Low-E double glazing.
NFRC-certified luxury architectural arched swing windows. Blends traditional Iberian heritage geometry with modern multi-chamber thermal insulation.
Custom precision-bent aluminum frames designed for luxury residential retrofits and self-built estates across the Douro Valley and Sintra.
Patented micro-ventilation acoustic system allowing natural air exchange while blocking coastal winds and urban sound infiltration.
Ultra-low U-value triple-glazed profile integrated with folding flyscreens. Built for extreme solar thermal blocking and high acoustic control.
Decorative internal/external muntin grid bars meeting classic Portuguese architectural aesthetics without sacrificing thermal double-glazing performance.
Premium Passive House standard compliant window system delivering sub-0.8 W/m²K total thermal insulation for modern nZEB developments in Portugal.
Commercial-grade heavy-duty casement systems designed for coastal resorts in the Algarve. Resists salt-spray corrosion with Qualicoat Seaside coating.
From the Atlantic rain fronts of Porto to the intense solar radiation of the Algarve, exported double glazing must balance heat gain, wind loads, salt oxidation, and acoustic isolation.
In Southern European climates, heat gain control is as critical as winter retention. Our custom Insulated Glass Units (IGU) feature magnetron sputtered Low-E coatings paired with high solar control (g-value ≤ 0.35 to 0.42). This reduces interior cooling loads by up to 38% during Iberian summer heatwaves while transmitting maximum visible light (VLT ≥ 70%).
Aluminum frames without thermal breaks suffer from thermal bridging, causing condensation and high U-values. We utilize 24mm to 34mm multi-chambered Polyamide 66 reinforced with 25% glass fiber (PA66GF25). This ensures mechanical structural strength against C5-category Atlantic wind loads while dropping frame transmittance (Uf) below 1.4 W/m²K.
Urban density in Lisbon combined with stone-paved streets requires advanced soundproofing. By combining unequal glass pane thicknesses (e.g., 6mm outer + 16mm Argon cavity + 8.76mm acoustic PVB laminated inner), we eliminate coincidence dip resonance frequencies, isolating heavy city noise and coastal wind whistles.
| Performance Indicator | Standard / Test Method | Manufacturer Spec (Double Glazed) | Impact on Portuguese Projects |
|---|---|---|---|
| Thermal Transmittance (Uw) | EN ISO 10077-1 / EN ISO 10077-2 | 1.0 – 1.3 W/m²K (Triple up to 0.79) | Complies with Portugal ADENE Energy Rating A+ standards. |
| Acoustic Performance (Rw) | EN ISO 717-1 (STC Rated) | 38 dB – 48 dB | Meets RGEU urban noise attenuation mandates in Lisbon & Porto. |
| Air Permeability | EN 12207 | Class 4 (Highest Rating) | Prevents draft and heat loss during severe winter dampness. |
| Watertightness | EN 12208 | Class E1050 (1050 Pa pressure) | Zero water penetration during heavy Atlantic storm rainfalls. |
| Wind Load Resistance | EN 12210 | Class C5 / B5 | Structural integrity for coastal cliff villas and high-rises. |
| Corrosion Resistance | Qualicoat / Qualanod Standard | Qualicoat Seaside (60-80μm) | Prevents powder paint peeling/pitting in high-salinity air. |
Different Portuguese landscapes present contrasting thermal, architectural, and environmental challenges. Here is how our custom export solutions are deployed across local scenarios.
The Challenge: High atmospheric salt content causes rapid oxidation on standard aluminum finishes, while intense summer sun drives up interior air conditioning expenses.
The Solution: We supply 6063-T6 aluminum profiles treated with Qualicoat Seaside pre-anodizing treatment to guarantee anti-corrosion life. Paired with Double Glazed Low-E Units filled with 90% Argon gas and a low solar coefficient ($g \le 0.35$), these systems keep luxury villas cool while protecting ocean-facing frames from marine pitting.
The Challenge: Strict municipality architectural guidelines require maintaining narrow frame sightlines and classic exterior profiles while meeting modern sound isolation standards.
The Solution: Our slimline casement series and arched double-glazed profiles feature authentic Georgian interior/exterior muntin bars. Equipped with asymmetric laminated glass, they cut street noise from urban traffic and nightlife by up to 45dB, restoring comfort to historic Pombaline and Alfama apartments.
The Challenge: High-velocity gale winds, heavy horizontal rains, and damp winter weather coming directly off the Atlantic Ocean in Northern Portugal.
The Solution: Heavy-duty thermal break profile systems engineered with triple continuous EPDM gasketing and deep drainage channels. Tested to EN 12208 Class E1050 watertightness, ensuring zero water ingress even under extreme wind-driven rains of 1050 Pascals.
The Challenge: Interior regions experience severe temperature swings — scorching summer days ($>40^\circ\text{C}$) followed by cold winter nights, placing heavy expansion stress on glass seals.
The Solution: Dual-seal structural silicone edge technology with warm-edge composite spacers (stainless steel + polypropylene). This maintains thermal expansion compliance, prevents seal degradation, and guarantees gas retention over a 25-year service life.
Understanding regulatory shifts and architectural preferences in Portugal is key for specifiers, importers, and developers.
Under the EU's Energy Performance of Buildings Directive (EPBD), all new constructions in Portugal must be Nearly Zero-Energy Buildings (nZEB). Glazing must reach an overall Uw rating of 1.4 W/m²K or lower. Importing factory-direct insulated thermal break systems allows developers to achieve ADENE Energy Class A or A+ certifications effortlessly.
Contemporary architectural designs across Cascais and Comporta demand maximum floor-to-ceiling glass area. Minimal aluminum sliding systems with concealed frames (outer sightline under 20mm) and high structural load capacities (up to 500kg per panel) represent the fastest-growing market segment.
Double glazing integrated with motorized internal Venetian blinds or smart switchable privacy glass (PDLC) is increasingly specified in high-end commercial spaces, boutique hotels, and modern residential developments to combine low maintenance with instant solar shading control.
With over two decades of dedicated aluminum window fabrication experience, we serve as a reliable OEM/ODM direct manufacturer for architectural firms, importers, and construction contractors worldwide.
Our in-house structural engineering team converts architectural concepts into detailed shop drawings, verifying wind load calculations, thermal performance, and installation tolerances before cutting any profile.
100% of manufactured window frames undergo pre-assembly, diagonal tolerance verification, hardware cycle testing, and gasket compression checks prior to export packaging.
Profiles are encased in multi-layer protective film, corner guarded, and packed into steel-reinforced wooden A-frame crates designed for containerized ocean transit directly to Lisbon or Leixões ports.
All products are accompanied by comprehensive Declaration of Performance (DoP) documents, test reports for EN 14351-1, and 5-to-10 year factory warranties on profile finishes and glass seal integrity.
Everything you need to know about importing double glazed windows, custom specifications, compliance, and shipping logistics.
Yes. All window systems exported to Portugal are manufactured in strict compliance with European Standard EN 14351-1 for windows and external pedestrian doorsets. They carry official CE markings and are supplied with complete Declaration of Performance (DoP) documentation detailing Uw thermal values, air permeability (EN 12207 Class 4), watertightness (EN 12208 Class E1050), and acoustic isolation test reports suitable for ADENE energy certification compliance.
For coastal installations located within 5km of the sea, we apply a specialized Qualicoat Seaside certified pre-anodizing chemical pre-treatment before electrostatic powder coating. This prevents sub-film filiform corrosion and salt oxidation. Additionally, we utilize marine-grade 316 stainless steel friction hinges, multipoint locking hardware, and anti-corrosive EPDM gaskets.
Standard custom fabrication takes 4 to 6 weeks following CAD shop drawing approval. Containerized sea freight to major Portuguese ports such as Lisbon (Porto de Lisboa) or Leixões (Porto) generally requires 25 to 35 days in transit. We handle all export customs paperwork, packing lists, and commercial invoices for streamlined clearance by your local freight forwarder.
Absolutely. We fabricate tailored glass build-ups based on project engineering requirements. Options include: toughened safety glass, acoustic laminated glass (PVB/SoundControl), solar-control Low-E coatings, argon gas filling (up to 95%), warm-edge composite spacers, decorative Georgian grid bars, integrated magnetic venetian blinds, or triple-pane units for Passive House performance.
Our standard export minimum order quantity is one 20-foot container (FCL), or one full villa/commercial project scope. For ongoing distributors, architects, or construction firms evaluating sample build-ups, we can accommodate consolidated LCL shipments for trial orders upon request.
Every order is shipped with detailed, step-by-step installation manuals, frame anchor placement diagrams, structural sealing guides, and profile cross-section schematics. Our technical support engineering team is also available via video call for real-time site commissioning and technical guidance.
Submit your architectural elevation drawings, schedule of openings, or thermal specification requirements. Our senior engineering team will respond within 24 hours with CAD shop drawings and direct factory quotation.
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