Aluminium exterior door L331 made to order

Aluminium external door featuring advanced thermal profiling and exceptional insulation performance. L331 system with Ud coefficient of 0.85 W/m²K for premium energy efficiency.

The L331 external door represents a premium solution for high-end residential entrances and commercial projects. Built with a 3 mm aluminium profile and a comprehensive 92 mm system depth, this door combines the timeless elegance of the material with top-tier thermal performance. The total thickness ensures exceptional structural stability, delivering reliable behaviour under wind loads and moisture exposure over decades.

The L331 profile incorporates an articulated 34 mm thermal break, engineered to block heat transfer and maintain interior comfort throughout the year. The 80 mm frame receives a triple EPDM gasket, creating hermetic sealing against air and water infiltration. These construction details significantly reduce heating and cooling demands, reflecting a commitment to sustainable efficiency. The ift Rosenheim certification for a Ud thermal coefficient of 0.85 W/m²K confirms European-standard performance excellence.

The quadruple glazing—44.1 triplex / 5mm Satinato / 5 mm / 44.1 triplex—delivers outstanding acoustic insulation and absolute robustness. Triple-laminated glass ensures enhanced security and effective urban noise control. Standard dimensions up to 1100×2300 mm and single-leaf variants up to 1200×2500 mm provide maximum installation flexibility, adapting seamlessly to diverse architectural contexts.

Available in customizable opening configurations, the L331 integrates effortlessly into both contemporary and classical projects. Aluminium offers unlimited finish and colour possibilities, enabling unique design expression for each property. The material is weatherproof by nature, requiring minimal maintenance, and its refined appearance demands no refurbishment over time.

Recommended for primary entrances of premium residences, corporate headquarters, and selective commercial spaces, the L331 pairs beautifully with natural stone, patinated concrete, or fine-quality flooring. Its discreet yet authoritative presence completes any interior, transforming the entrance into a statement of exclusivity and elevated standards.

The Ud value is 0.85 W/m²K — certified by ift Rosenheim — placing this door in the premium insulation category. For comparison, standard doors typically rate 1.2–1.5: you significantly reduce heat loss and lower monthly heating costs. The system features a 34 mm articulated thermal break and quadruple glazing (44.1 triplex + 5mm Satinato).

The door offers significant flexibility: standard maximum dimensions are 1100 × 2300 mm, but for single-leaf configurations you can order up to 1200 × 2500 mm. For unusual requirements—narrower openings, specific heights, or panoramic glass ratios—contact our sales team with your location details; they can develop a custom solution while maintaining the structural integrity of the L331 system.

The door uses aluminium profile (3 mm thickness) with a 34 mm articulated thermal break — this insulates the interior from extreme temperature swings. The system's total depth is 92 mm and the frame 80 mm; this combination allows it to withstand strong winds and thermal stress. Aluminium does not warp in heat or cold, does not swell, and requires minimal maintenance — annual cleaning with mild soap and water keeps the appearance and function pristine for decades.

The glass is quadruple (44.1 triplex on each edge with 5 mm Satinato in the middle) — a sophisticated construction that significantly attenuates external noise. Satinato frosted glass enhances acoustic insulation by disrupting sound waves, and the triplex structure absorbs vibrations. While not certified to standard acoustic classes, the combination of thickness and layers delivers superior sound performance compared to conventional systems — ideal for homes near busy roads or urban areas.

The door requires a properly constructed opening (masonry minimum 25 cm thick, square) and a frame (casing) compatible with the 92 mm system depth. Installation involves perimeter fastening on all four sides with equal gaps for multi-point sealing (3 EPDM gaskets); a specialist typically takes 4–6 hours. After installation, frames must be sealed with quality caulk to prevent water infiltration; complete guidelines and compatibility details will be provided by the sales team before purchase.

The L331 door is equipped with quality standard hardware and a multi-point sealing system (3 EPDM gaskets) ensuring secure closure. For specific details on burglary resistance classes (RC2 or RC3) and hinge type (concealed or visible), consult the sales department — detailed specifications depend on your chosen configuration (single-leaf vs. standard opening) and finish options. The robust aluminium structure and quadruple glazing provide a solid foundation for premium security solutions.