Constructed using 6063-T5/T6 structural-grade thermal-break extrusions, multi-point locking perimeter hardware, and high-performance Low-E acoustic double/triple glazing packages.
As Guangdong Dejiyoupin Doors and Windows Co., Ltd. (DERCHI), operating out of Foshan, Guangdong, we eliminate trading intermediaries, enabling tier-one real estate developers, contractors, and architectural consultancies to realize complex fenestration projects on time and on budget.
From raw ingot melting, precision aluminum extrusion (up to 3.0mm wall thickness), and CNC multi-axis milling, to robotic powder coating and insulated glass sealing.
Verified under AS2047, CE (EN 14351-1), NFRC, ISO 9001, and UL fire standards. Full structural calculation sheets and third-party lab test reports provided for all projects.
Our team of 40+ fenestration draftsmen develops shop-drawing submittals, load-bearing static calculations, and BIM models tailored to wind-load pressures and hurricane codes.
Reinforced steel-reinforced fumigated wooden crates, multi-layer closed-cell polyethylene foam, and containerized desiccants protect finishes against ocean-freight salt corrosion.
A technical briefing for commercial developers, general contractors, and specifiers navigating performance standards, ESG metrics, and smart building integration.
In contemporary architectural envelope design, the functional categorization of the "aluminum back door" has expanded beyond a secondary exit. Modern residential villas, coastal hospitality properties, and urban multi-family developments now treat the building perimeter back entrance as a primary line of environmental control, lifestyle integration, and structural security. Specifying aluminum over timber or vinyl has grown at an annualized rate of 7.4% across global markets, driven by superior lifecycle metrics, structural rigidity, and resistance to environmental fatigue.
The core advantage of high-end Chinese aluminum extrusion fenestration lies in the alloy formulation and thermal break engineering. Premium back door systems utilize primary architectural 6063-T6 or 6061-T6 aluminum alloys. To combat heat transfer in desert or humid environments, structural polyamides (PA66 GF25—polyamide reinforced with 25% glass fiber) separate interior and exterior profiles, preventing thermal bridging and surface condensation.
For exterior back doors subject to high cycling and wind loads, structural wall thickness must meet or exceed 2.0mm to 2.5mm for sliding and bi-folding frames, and up to 3.0mm for high-security swing entries. Surface finish integrity relies on high-durability fluorocarbon (PVDF) coating systems or Class I architectural powder coatings adhering to AAMA 2604/2605 parameters, ensuring colorfastness against high UV radiation and 3,000-hour neutral salt-spray corrosion resistance.
| Performance Parameter | Standard Aluminum Back Door | Architectural Thermal-Break System (DERCHI Spec) | Procurement Compliance Standard |
|---|---|---|---|
| Thermal Transmittance (U-Value) | 3.5 – 5.0 W/(m²·K) | 1.1 – 1.8 W/(m²·K) (Triple Glazed Low-E) | NFRC 100 / EN ISO 10077-1 |
| Water Penetration Resistance | 150 Pa – 250 Pa | 600 Pa – 900 Pa (Hurricane/Monsoon Grade) | ASTM E331 / AS4420.5 |
| Acoustic Attenuation (STC / Rw) | Rw 25 - 28 dB | Rw 38 - 45 dB (Acoustic Interlayer Glass) | ASTM E90 / ISO 717-1 |
| Structural Wind Load Deflection | 1200 Pa Serviceability | Up to 4500 Pa (Design Pressure > 90 PSF) | AS2047 / ASTM E330 |
| Operating Hardware Longevity | 25,000 Manual Cycles | 100,000+ Cycles (German Siegenia / Hoppe Gear) | EN 13126 / AAMA 901 |
Commercial developers and import traders are pivoting rapidly based on three emerging procurement dynamics:
"Overseas procurement failures frequently stem from underspecified glass deflection tolerances and inadequate anchoring under local cyclone wind loads. Guangdong Dejiyoupin Doors and Windows Co., Ltd. resolves this by auditing every export schedule with structural finite element analysis (FEA) before extrusion cutting begins."
Circular economy requirements mandate high recycled-content aluminum billets (hydro-powered extrusion) and non-toxic powder coating to satisfy LEED and BREEAM certifications.
Climate instability has driven standard fenestration specs to incorporate hurricane impact laminates (SentryGlas / PVB) resisting 9-lb 2x4 missile impact tests at 50 ft/s.
Smart back doors now integrate seamlessly with perimeter home security, featuring hidden magnetic contacts, automated sash closures, and fingerprint biometric sensor handles.
Clear, direct answers regarding custom manufacturing, export shipping, certification protocols, and commercial terms.
Collaborate directly with Guangdong Dejiyoupin Doors and Windows Co., Ltd. (DERCHI) — Foshan's trusted manufacturer for high-performance aluminum back doors, heavy-duty lift-slides, and panoramic bi-folds.