Aluminium exterior door L302 made to order

L302 aluminium entrance door with certified triple glazing and exceptional thermal performance Ud 0.85 W/m²K. The 92 mm system depth and articulated thermal break deliver premium energy efficiency and durability.

The L302 is positioned in the premium segment of aluminium entrance doors, combining advanced thermal engineering with robust, refined design. Built for clients who demand exceptional energy performance and lasting durability without aesthetic compromise.

The 3 mm aluminium profile and articulated 34 mm thermal break create a sophisticated barrier against heat loss. The total system depth of 92 mm accommodates premium quadruple glazing: 44.1 mm triplex glass, 5 mm satinized interlayer, and exterior triplex layer. Triple EPDM gaskets deliver hermetic sealing against air and water infiltration, even in severe weather.

With a thermal coefficient Ud of 0.85 W/m²K — certified by ift Rosenheim — this door ranks among the most efficient on the market. Acoustic insulation and wind resistance are equally outstanding, secured by meticulous gasket design and hermetic construction. The door meets passive house and ultra-low-energy building standards with consistent performance.

Standard maximum dimensions of 1100×2300 mm, with single-leaf capacity to 1200×2500 mm, provide flexibility across diverse projects. The aluminium benefits from long-term corrosion protection, ensuring durability in any climate. The system supports multiple opening configurations — hinged, sliding, or pivot — tailored to architectural context.

Ideal for contemporary residences, energy-efficient buildings, and premium commercial projects, L302 pairs seamlessly with natural stone, polished concrete, or solid wood flooring. Standard anodized finishes are available in neutral tones that complement any design palette.

The L302 achieves a thermal coefficient Ud of 0.85 W/m²K, certified to ift Rosenheim standards — exceptional performance for exterior doors. This low value means minimal heat loss during winter and optimal protection against unwanted summer heat gain, significantly reducing air conditioning load. The outstanding insulation is achieved through the 92 mm system depth and the articulated 34 mm thermal break, which completely eliminates thermal bridging.

The L302 features quadruple glazing — 44.1 triplex / 5mm Satinato / 44.1 triplex — delivering superior thermal and acoustic insulation. Triplex laminated glass on both surfaces ensures security against break-ins through high mechanical resistance, while the center 5mm Satinato layer controls natural light transmission and provides privacy. This multi-layered construction significantly reduces noise transmission and stabilizes indoor temperature.

The L302 requires a rough opening compatible with standard dimensions (max. 1100×2300 mm) or single-leaf dimensions (max. 1200×2500 mm). The 80 mm frame is anchored directly into the masonry with full-length support brackets, and a structural threshold of minimum 100 mm is recommended at the bottom. Masonry must be flat and stable; installation requires complete frame shoring and multi-point sealing with polyurethane foam and elastic cord. Installation must follow the manufacturer's diagrams to ensure thermal performance and guaranteed sealing.

The L302 features a 3 mm aluminium profile with internal insulating core (complete 92 mm leaf). The articulated 34 mm thermal break is made from high-strength plastic material, interrupting heat transmission between exterior and interior aluminium. Corrosion protection is achieved through anodizing and/or lacquering (painted finish available), which creates a protective film on the aluminium surface. For severe exposure environments (coastal, industrial), we recommend checking the protection class at order and selecting a premium polyester-based polymer finish.

The L302 requires regular cleaning with soft water and neutral detergents; for painted finishes (polymer lacquers), avoid abrasive and aggressive solvents. The EPDM gaskets (3-point sealing) should be inspected annually and lightly lubricated with neutral silicone to maintain optimal sealing. Closing mechanisms and hinges should be cleaned periodically of dust and deposits. For anodized finishes, protective wax is additionally recommended every 2–3 years in corrosion-risk environments. Any abnormal opening or leaf skewing requires specialist inspection and adjustment.

The L302 comes in standard dimensions of max. 1100×2300 mm or single-leaf variant up to max. 1200×2500 mm. For non-standard space requirements, the door can be custom-ordered within the structural capabilities of the profile — consultation with a sales specialist is mandatory to verify feasibility and determine production timelines. Size modifications may also affect thermal performance and the type of hinges/hardware required, which is why each custom order requires specific technical design.