Aluminium exterior door L400 made to order

Aluminium exterior door with slim profile and quadruple glazing, achieving premium thermal performance at Ud=0.85 W/m²K. Contemporary entrance solution with outstanding energy efficiency.

The L400 exterior door positions itself as a premium solution in the aluminium entrance range, tailored for residential and commercial projects that prioritize thermal performance and minimalist aesthetics. Its slim profile and balanced proportions redefine contemporary standards for entrance openings, enabling seamless integration within modern and traditional facades alike.

Construction is anchored by an optimized aluminium profile measuring 92 mm at system depth, reinforced by an articulated thermal break of 34 mm that significantly reduces heat transfer. The aluminium, at 3 mm thickness, ensures long-term rigidity and durability. The quadruple glazing—structured as 44.1 triplex + 5 mm satinato + 44.1 triplex—delivers superior sound insulation and controlled solar protection, while three EPDM gaskets guarantee airtightness across varying climatic conditions.

Energy performance is certified through ift Rosenheim testing, with a thermal coefficient of Ud=0.85 W/m²K—a value positioning the door in the premium category for luxury entrances. This performance substantially reduces heating and cooling costs while ensuring year-round climate comfort and compliance with EU efficiency regulations.

The system offers flexible configurations, with standard dimensions up to 1100×2300 mm and made-to-order capability up to 1200×2500 mm for single-leaf openings. The profile accommodates multiple opening systems—hinged, pivot, sliding—making it adaptable to diverse spatial requirements and use cases. Finishes can be customized across the RAL palette to complement the architectural identity of your project.

L400 is recommended for primary entrances in modern residences, villas, commercial buildings, and public institutions where thermal insulation and distinctive visual presence are paramount. It pairs successfully with natural stone, polished concrete, or porcelain flooring, amplifying the contemporary expression of your entrance.

The thermal coefficient Ud is 0.85 W/m²K, certified according to ift Rosenheim testing standards — Europe's strictest benchmark. This is measured on the complete assembly (frame + glazing), not glass alone, and represents actual heat loss under real-world conditions. Values below 1.0 W/m²K place this door in the highest energy performance category for exterior applications.

The door leaf has a total thickness of 92 mm, with 3 mm aluminium profile and an internal articulated thermal break of 34 mm — the critical element for insulation. The glazing is quadruple — 44.1 triplex / 5 mm Satinato / 44.1 triplex — ensuring superior thermal-acoustic insulation and ballistic protection. The frame is 80 mm deep, allowing perfect integration into standard masonry.

The Satinato glass (5 mm) in the quadruple configuration provides complete opacity — no line of sight through the door. It is a chemical etching process that completely blocks direct light and views while maintaining diffuse light transmission. This choice is ideal for entries requiring privacy without compromising spatial openness.

The door features 3 EPDM gaskets along the entire perimeter — a multi-point sealing system that creates a continuous barrier on frame and leaf. EPDM is synthetic elastomer ultra-resistant to UV and weather, guaranteeing 20+ years of performance without degradation. This 3-point configuration combined with the 92 mm profile completely blocks water and air infiltration while significantly reducing external noise transmission.

Standard dimensions are maximum 1100 × 2300 mm (double-leaf configuration) and for single leaf maximum 1200 × 2500 mm — ideal proportions for residential and commercial entries. The product is available for custom order at any size within construction tolerances (up to ±5 mm), with standard lead time of 4–6 weeks. Installation recommendation: allow 10 mm clearance on each side for adjustments and thermal compensation.

The door installs into an existing frame (universal system) with minimum depth of 80 mm — compatible with BCA, brick, or concrete masonry. The door frame has horizontally adjustable mounting posts (±5 mm), allowing fine-tuning for wall irregularities. Polysterene or polyurethane foam is recommended for sealing gaps between frame and wall. After installation, allow 24 hours air-drying before applying final seals, ensuring complete adhesive cure.