China Wholesale Aluminium Heritage Doors Suppliers & Exporter

Traditional hot-rolled solid steel sections have high thermal conductivity (~50 W/m·K), which causes severe indoor surface condensation, mildew, and plaster rot in cold or humid climates. DERCHI Aluminium Heritage systems feature advanced multi-chamber profiles with 24mm–34mm PA66-GF25 polyamide thermal breaks. This reduces thermal conductivity by over 95%, maintaining interior profile surface temperatures well above the dew point and meeting strict energy codes such as California Title 24 and UK Building Regulations Approved Document L.

Using high-tensile 6063-T6 virgin aluminum alloy with reinforced internal web wall thicknesses of 2.0mm to 2.5mm, our narrowest exterior door sash stiles achieve a visible sightline of just 33mm (1.3 inches). For interior non-thermal pocket and hinged screens, our ultra-narrow systems achieve a razor-thin 18mm visible face width, providing an authentic heritage appearance that rivals historical wrought-iron glazing.

For exterior envelope applications, our standard specification is an insulated glass unit (IGU) measuring 28mm overall: 6mm Low-E Tempered + 16A (Argon gas fill with warm-edge Swiss spacer) + 6mm Clear Tempered. For soundproof urban environments or hurricane-prone coastal regions, we engineer laminated acoustic build-ups such as 6mm Low-E + 12A + 4mm + 0.76mm PVB/SGP acoustic interlayer + 4mm Tempered, achieving sound attenuation ratings up to STC 42 and meeting large missile impact standards.

We use automated horizontal and vertical electrostatic powder coating certified to Qualicoat Class 2 standards and AkzoNobel Interpon D2525 architectural specifications. For coastal projects within 500 meters of the sea, we apply a 3-coat Fluorocarbon (PVDF / 70% Kynar 500) system with a minimum dry film thickness (DFT) of 45–55 microns. This withstands 3,000 hours of continuous AAMA 2605 salt spray testing without blistering, pitting, or chalking.

We accommodate both architectural approaches based on project requirements. Simulated Divided Lites (SDL) use internal duplex thermal spacer grids inside the sealed insulated glass unit, overlaid with exterior CNC-notched aluminum heritage astragal bars adhered via 3M VHB industrial structural tape. This provides superior thermal efficiency and structural integrity. True Divided Lites (TDL) use individual small panes of glass glazed into discrete aluminum transoms and mullions, ideal for heritage conservation district approvals.

Upon final sign-off of our detailed CAD shop drawings and color sample approval: standard profile extrusions require 15–20 working days, followed by 10–12 days for precision CNC fabrication, assembly, and quality testing. Total factory production lead time runs 25 to 35 calendar days. Ocean freight from Shenzhen or Guangzhou ports takes approximately 14–18 days to the US West Coast (Long Beach/Oakland), 28–32 days to the East Coast (New York/Savannah), and 22–26 days to European hub ports (Rotterdam/Felixstowe).

Yes. Over 70% of our export production is built to custom imperial door schedules (inches/feet) for the United States, Canada, and the Caribbean. Our parametric engineering software converts imperial rough opening (R.O.) dimensions into precise metric extrusion cut-lists, accounting for shim clearances, sub-sill drainage requirements, and interior drywall returns without dimensional discrepancies.

We use a 5-stage protective export crating protocol: First, all aluminum surfaces are masked with low-tack protective film. Second, profile corners are fitted with heavy-duty molded EPE foam bumpers. Third, the entire unit is wrapped in multi-layer shockproof bubble wrap. Fourth, units are placed inside sealed, fumigated ISPM-15 compliant plywood crates reinforced with steel corner straps. Finally, moisture-absorbing silica gel bags are enclosed to prevent condensation during sea voyage temperature shifts.

Our heritage door collections use premium multi-point locking gear from world-leading hardware suppliers, including German Siegenia, Hoppe, Roto Frank, and Italian Giesse. We offer custom concealed 3D adjustable pivot hinges, heritage lever handles in antique brass, matte black, satin nickel, and oil-rubbed bronze finishes, as well as electronic smart access locks compatible with Control4 and Crestron home automation systems.

To support architectural specifiers and developers, our MOQ is 1 complete door set or opening system for commercial and residential mock-ups. We provide custom finish swatches and corner profile cross-section models (cut-away corner samples showing thermal breaks, glazing beads, and gaskets) via DHL/FedEx within 5 to 7 business days. Prototype sample costs are fully credited toward subsequent full container wholesale orders.