Engineered Portfolios
High-Performance Exterior Storm Windows & Entry Systems
Rigidly engineered extruded aluminum alloy profiles built for extreme cyclonic winds, air tightness, and salt-spray corrosion resistance across residential, commercial, and coastal developments.
180,000㎡
Integrated Production Hub
600+
Technical Specialists
100+
Global Patents & Certificates
25+ Yrs
Direct Factory Engineering
Industry Technical Whitepaper
Engineering Verification for CE Certified Aluminum Storm Windows
Decoding mechanical resistance, wind load deflection, air permeability, and thermal performance according to European Standard EN 14351-1 and related international testing codes.
In modern high-performance building envelopes, storm windows fabricated from virgin-grade extruded aluminum alloys (6063-T5 and 6063-T6) serve as an indispensable barrier against extreme aerodynamic loads, cyclonic wind-driven rain, and airborne projectile impacts. For architectural specifiers and commercial procurement officers, obtaining authentic CE Certification under EN 14351-1 is not merely a regulatory prerequisite—it represents verified data integrity concerning resistance to wind loads, water tightness, air permeability, and overall acoustic/thermal transmittances.
1. Mechanical Rigidity & Extruded Alloy Specification
A standard window profile is prone to micro-torsion and structural failure under severe negative pressure differentials created during coastal squalls and hurricanes. Our certified storm window series employ precision-engineered multi-chamber 6063-T5 aluminum extrusions with nominal wall thicknesses reaching 2.0mm to 3.0mm in primary structural sections. Through multi-cavity chamber design integrated with thermal break strips made of 25% glass fiber reinforced Polyamide (PA66 GF25), the structural section achieves exceptional inertia values (Ix, Iy) while preventing thermal bridging.
Specification Insight: In compliance with CE EN 12210, certified exterior storm windows must endure dynamic positive and negative pressure tests up to Class C5/B5 (over 2000 Pa). DERCHI systems are evaluated to AS 2047 N6 cyclonic thresholds—withstanding exceeding 3000 Pa wind pressure without glass disengagement or frame plastic deformation.
2. Air Tightness & Watertight Integrity Mechanisms
Water penetration under heavy wind pressure is governed by the capillary effect and air pressure imbalances between the exterior facade and internal living spaces. To achieve watertightness ratings matching EN 12208 Class 9A (exceeding 600 Pa without leakage), our storm assemblies incorporate three-stage EPDM (Ethylene Propylene Diene Monomer) sealing gaskets combined with continuous isobaric drainage channels. Pressure equalization within the profile frame allows moisture to drain rapidly through hidden, baffled weeping valves that prevent backflow even during sustained gusts.
| Test Parameter | Standard Window Spec | CE Certified Storm Spec | DERCHI Engineering Standard |
|---|---|---|---|
| Wind Load Resistance | Class 2 (800 Pa) | Class 4 to 5 (1600 - 2000 Pa) | AS 2047 N6 / >3000 Pa Extreme Cyclone |
| Air Permeability | Class 2 (300 Pa) | Class 4 (600 Pa) | EN 1026 Class 4 (0.05 m³/[h·m]) |
| Water Tightness | Class 4A (150 Pa) | Class 7A to 9A (300 - 600 Pa) | EN 12208 Class E1050 (>1050 Pa) |
| Thermal Transmittance (Uf) | 3.8 - 4.5 W/(m²·K) | 1.8 - 2.4 W/(m²·K) | 1.3 - 1.6 W/(m²·K) with PA66 Break |
| Impact Resistance | Standard Annealed Glass | EN 356 P4A / Laminated | NFRC / ASTM E1886 Large Missile Level D |
3. Laminated Impact Glazing Technologies
Exterior storm fenestration relies heavily on the composite interaction of double- or triple-glazed units utilizing SentryGlas (SGP) or high-grade Polyvinyl Butyral (PVB) acoustic and safety interlayers. In the event of surface fracture from high-velocity airborne debris during monsoons or typhoons, the laminated structure remains intact within the glazing channel, resisting cyclic wind suction forces that would otherwise blow out standard fenestration and cause rapid internal building depressurization or structural roof loss.
Manufacturing Authority
Why Global Projects Partner Directly with DERCHI
Guangdong Dejiyoupin Doors and Windows Co., Ltd. ranks among China's Top 10 premium architectural door and window manufacturers, delivering engineering precision for 25+ years.
180,000㎡ Modern Production Base
Situated in Foshan, Guangdong, our advanced smart manufacturing complex houses fully automated CNC cutting centers, German precision corner crimping lines, and electrostatic powder coating plants staffed by 600+ specialists.
Multi-Jurisdiction Compliance
We do not merely self-certify. DERCHI products are independently verified to CE (EN 14351-1), Australian AS 2047 N6, North American NFRC, ISO 9001, and UL fire-rated standards with over 100 patents and formal test certifications.
One-Stop Structural Consolidation
Streamline your overseas procurement. In addition to exterior storm windows, our factory produces cast aluminum luxury entrance doors, heavy-duty large pivot systems, commercial folding partitions, and smart garage doors under one roof.
Global Project Recognition
From prestigious villa estates in the United States and Canada to major luxury developments across the Middle East and Southeast Asia (showcased at WORLDBEX Philippines 2025), our solutions withstand the most demanding climates.
Engineering CAD & BIM Integration
Our dedicated engineering department provides custom CAD shop drawings, wind load deflection calculations, glass thermal modeling, and structural installation brackets matched to your specific opening schedules free of charge.
Real-Time Project Coordination
Direct communication with fluent English-speaking technical sales engineers based in Foshan (GMT+8). Full schedule alignment, container optimization, and pre-shipment live video QA inspections protect your budget and timeline.
Industry Forecast 2026–2030
Future Trends in Aluminum Storm Window Procurement
How architectural decarbonization, tightening coastal hurricane codes, and circular aluminum supply chains are transforming B2B fenestration specifications.
Low-Carbon Compliance
Recycled Hydro-Alloy Extrusions
Future tenders in Europe and North America increasingly demand Environmental Product Declarations (EPDs). Specifiers are shifting towards prime billets produced with renewable energy, reducing embodied carbon by up to 65%.
Climatic Adaptation
Multi-Hazard Storm Envelopes
Storm fenestration is no longer isolated to hurricane zones. Increased global frequency of microbursts and flash storms drives universal demand for hybrid systems that combine AS 2047 cyclonic impact resistance with ultra-high acoustic damping.
Energy Regulations
Warm-Edge & Vacuum Glazing
With stringent Passive House and European net-zero standards, standard double glazing is transitioning to vacuum insulated glass (VIG) and warm-edge TPS spacer bars embedded within super-insulated aluminum storm frames.
Smart Fenestration
Automated Concealed Actuators
Modern luxury villas and commercial structures demand seamless motorized operation integrated with building management systems (BMS). Integrated wind and rain sensors automatically lock sash vents during unexpected pressure surges.
Procurement Knowledge Base
Frequently Asked Questions by Commercial Buyers & Importers
Addressing structural compliance, sea freight containerization, surface durability, and custom CAD configurations for overseas projects.
What distinguishes an authentic CE-certified storm window from a standard casement window?
CE certification under EN 14351-1 requires third-party witnessed laboratory testing verifying three critical performance metrics: resistance to wind load (EN 12211/12210), water tightness under static and dynamic pressure (EN 1027/12208), and air permeability (EN 1026/12207). Genuine storm windows also feature structurally glazed laminated security glass and multi-point perimeter locks engineered to resist sustained cyclonic suction.
Can DERCHI engineer custom sizes to accommodate large structural openings?
Yes. Every project undergoes customized engineering. Our Foshan technical team assesses local wind-load pressures, structural deflection limits (L/175 or L/250 criteria), and architectural aesthetic requirements. We supply shop drawings and structural reinforcements—such as internal steel stiffeners or heavy-duty structural mullions—to fulfill opening sizes beyond typical catalog dimensions.
How do aluminum exterior storm windows resist harsh marine coastal environments?
Corrosion resistance is achieved by applying Qualicoat-certified fluorocarbon (PVDF) architectural coatings or architectural anodizing exceeding 20 microns. These surface treatments, combined with marine-grade 316 stainless steel hinges, fasteners, and multi-point locking gear, prevent galvanic oxidation and surface pitting even in intense salt-spray zones such as coastal resorts in Southeast Asia or the Caribbean.
What is the standard production lead time and export sea packaging procedure?
Standard custom fabrication typically ranges between 25 to 35 business days following CAD shop drawing confirmation. To ensure zero transit deformation during ocean freight, all frames and sashes are wrapped in protective film, padded with shock-absorbing foam corners, and crated in fully enclosed, fumigated solid plywood cases designed for forklift unloading.
Do your storm window systems qualify for North American and Australian building codes?
Yes. Alongside our European CE certifications, DERCHI products have undergone rigorous testing satisfying Australian AS 2047 (reaching highest level N6 cyclonic rating) and North American NFRC/ASTM impact standards. Official test reports, certificate copies, and structural factory test verifications are provided during tender documentation.
What documentation should an architect or general contractor send for an accurate estimate?
To receive a complete bill of materials and structural quotation within 24 hours, provide: (1) Architectural window elevations or CAD opening schedules with dimensions (W × H); (2) Glazing specifications (e.g., insulated, Low-E, laminated storm spec); (3) Preferred frame surface finish and color; and (4) Project delivery location and wind exposure category.
Request an Engineered Storm Fenestration Quote
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