Aluminium exterior door L531 made to order

L531 aluminium entrance door with premium thermal performance (Ud 0.85 W/m²K) and quadruple glazing. A robust system engineered for extreme weather conditions with articulated thermal break technology.

The L531 exterior aluminium door is a premium entrance solution for residential and commercial projects requiring exceptional thermal performance and structural durability. Built with a 3 mm aluminium profile and total system depth of 92 mm, it features articulated thermal break technology spanning 34 mm to create a thermal barrier between interior and exterior environments, performing optimally under demanding climatic conditions.

The construction combines quadruple glazing (44.1 triplex / 5mm Satinato / 44.1 Triplex) mounted within a frame depth of 80 mm and leaf thickness of 92 mm. A comprehensive three-point EPDM gasket sealing system runs the full perimeter, delivering continuous thermal and acoustic insulation. High-grade aluminium is treated for corrosion resistance and weathering durability, ensuring maintenance-free performance over decades of use.

Thermal efficiency is certified through ift Rosenheim testing at Ud 0.85 W/m²K, positioning the L531 among the highest-performing entrance systems available. This value reflects the combined effect of the articulated thermal break and triple-sealed glazing, substantially reducing heat loss during winter months while maintaining interior climate stability. Structural robustness of the profile and gaskets ensures lasting airtightness and weather resistance throughout the door's service life.

Design flexibility accommodates standard dimensions up to 1100×2300 mm, with single-leaf configurations available to 1200×2500 mm for bespoke applications. Aluminium's clean lines and refined appearance integrate seamlessly into contemporary architecture, commercial façades, and renovation projects seeking European engineering standards.

The L531 is ideal for climate-challenged regions, principal entrances of substantial residential or institutional buildings, and comprehensive refurbishment where thermal compliance is mandatory. It pairs naturally with matching aluminium window systems and underfloor heating installations.

The Ud coefficient of 0.85 W/m²K (certified by ift Rosenheim) places this door in the high-performance category for exterior applications, with superior insulation that minimizes heat loss in severe climates. The combination of articulated thermal break (34 mm) and quadruple glazing (44.1 triplex/5mm Satinato/44.1 triplex) ensures consistent thermal comfort and significant reduction in heating costs.

The door is constructed from solid aluminium profile with insulating core and leaves of 92 mm total thickness, with aluminium walls of 3 mm. The generous thickness combined with the robust profile provides increased structural rigidity, resistance to deformation over time, and superior stability in windy conditions and extreme thermal fluctuations. Aluminium does not expand, rot, or require significant maintenance.

The door features 3 multi-point EPDM gaskets that create a continuous sealing barrier around the entire perimeter, providing maximum protection against rain water, dust, and warm air loss. EPDM elastomers are extremely durable, resist UV and thermal fluctuations without deterioration, maintaining sealing effectiveness even after decades of use.

Yes, this door can be customized to order. Maximum available dimensions are 1200×2500 mm for a single leaf, offering flexibility for projects with specific requirements. For standard or custom dimensions, the profile and insulation systems remain unchanged, guaranteeing the same thermal and structural performance regardless of size.

The door is installed in a complete aluminium profile frame with frame depth of 80 mm, anchored in the opening with mechanical anchors or polyurethane foam. Masonry must support the weight of the assembly and provide a straight, undistorted opening. The 92 mm system depth requires frames with corresponding thickness; consult full technical specifications for exact opening dimensions.

Aluminium requires periodic cleaning with water and mild soap; EPDM gaskets can be cleaned the same way. Any finish (anodized lacquer, paint, veneer, or laminate) remains stable due to aluminium's intrinsic properties—it does not oxidize or expand. For optimal maintenance, avoid harsh chemicals and dry-wipe after cleaning; industrial-grade aluminium designed for exterior use naturally resists UV and weathering for decades.