Aluminium exterior door L523 made to order

Premium aluminium exterior door with 92 mm system depth and exceptional thermal insulation (Ud 0.85 W/m²K). Engineered for high-performance entrances with triple-sealed EPDM gaskets and quadruple glazing.

The L523 model is a high-performance aluminium exterior door designed for demanding residential and commercial projects. The system profile, measuring 92 mm overall, combines precision engineering with premium material selection, ensuring lasting rigidity and structural integrity across seasons.

Construction centres on 3 mm aluminium extrusion reinforced by corrosion-resistant hardware and superior locking mechanisms. The complete leaf thickness reaches 92 mm, with frame depth set at 80 mm — proportions engineered for stability and airtightness. Thermal efficiency is achieved through an articulated 34 mm thermal break that interrupts cold bridging pathways, significantly reducing heat transmission. Triple EPDM gasket sealing meets certification standards, while the quadruple glazing — two 44.1 mm triplex panes sandwiching a 5 mm Satinato centre — delivers both acoustic and thermal insulation at premium levels.

Certified ift Rosenheim performance delivers a Ud coefficient of 0.85 W/m²K, positioning this model among top-tier solutions in its category. This thermal rating minimizes winter heat loss and maintains consistent interior comfort. Weather resistance and temperature cycling durability are assured through rigid construction and surface treatments that prevent oxidation and material degradation.

The door accommodates standard dimensions up to 1100×2300 mm for single-leaf configurations, with single-pane variants extending to 1200×2500 mm — accommodating diverse architectural requirements. System flexibility allows adjustment of fixing points to suit varied opening widths and installation contexts.

Ideal for primary entrances in contemporary homes, office buildings, and commercial spaces where appearance and energy performance converge. The clean aluminium aesthetic pairs seamlessly with matching window systems, tinted glass, or lacquered finishes, and complements neutral to warm flooring palettes. The linear profile geometry suits both minimalist design and traditional architecture alike.

The L523 achieves a thermal coefficient of 0.85 W/m²K, certified through ift Rosenheim testing, placing it among the top-tier performance doors in aluminium. This result is made possible by the 34 mm articulated thermal break and quadruple glazing with triplex insulating layers, ensuring long-lasting functionality and significant heat loss reduction.

The L523 door leaf features a 92 mm aluminium construction with a 3 mm aluminium profile, insulated core and aluminium backing. Available finishes include custom RAL paint colours, natural wood veneers or modern laminates, tailored to design requirements and architectural integration of the main entrance.

The L523 door is equipped with premium-grade hardware and multi-point sealing system with 3 EPDM gaskets for secure and airtight closure. The system construction supports RC2 and RC3 burglary resistance classes, depending on hinge and locking device configuration, providing the protection level needed for main entrances.

The L523 is installed standard in a frame with 80 mm depth, secured to masonry via lateral anchor bars, with integrated drainage and ventilation system. With total system thickness of 92 mm, the existing opening width must be verified for compatibility, and for non-standard dimensions, the model supports customisation up to 1200×2500 mm.

The L523 aluminium finish requires regular cleaning with water and neutral detergent to remove pollutants and salt (if near coastal areas), avoiding abrasive pastes. The EPDM gaskets in the system should be inspected annually and treated with specific lubricant to maintain sealing and elasticity, ensuring longevity of thermal and acoustic performance.

The L523 is fully adapted for northern climates and cold conditions thanks to its 0.85 W/m²K thermal coefficient and insulating quadruple glazing that minimise condensation and heat loss. The 34 mm articulated thermal break and integrated drainage system ensure optimal operation in low temperatures and high humidity, maintaining interior thermal comfort and superior energy efficiency.