Aluminium exterior door L731 made to order

L731 aluminium exterior door with premium thermal insulation (Ud = 0.85 W/m²K) and quadruple glazing, engineered for superior energy performance and lasting durability.

The L731 exterior door serves residential and commercial projects with rigorous energy and aesthetic demands. The extruded aluminium system, 92 mm total depth, embodies controlled modernity and structural reliability, certified to ift Rosenheim standards. This premium positioning reflects a robust yet refined construction capable of delivering superior thermal performance across decades.

The 3 mm structural aluminium combines lightness with durability, supporting openings up to 1200×2500 mm in single-leaf swing configuration. The profiled 80 mm frame incorporates an articulated 34 mm thermal break, effectively reducing thermal bridging and creating a continuous barrier between interior and exterior. Triple EPDM gaskets maintain lasting weather-tightness, neutralising air and water infiltration under any climate condition.

Certified thermal performance of Ud = 0.85 W/m²K positions this door among benchmark systems, significantly reducing heat loss and optimising the building's energy consumption. The quadruple glazing (44.1 triplex / 5mm Satinato / 44.1 triplex) merges acoustic insulation with visual clarity, diminishing urban noise while fostering a serene interior environment. The Satinato finish also provides enhanced privacy options for sensitive spaces.

Design flexibility accommodates standard dimensions up to 1100×2300 mm, with customisation available for larger openings. The contemporary profile and refined lines integrate seamlessly into minimalist, modern, or refined traditional-influenced architectures. Aluminium accepts bespoke RAL powder-coating, adapting completely to each project's design context.

Recommended for primary residential entrances, office buildings, commercial spaces, and homes with elevated energy standards, the L731 pairs flawlessly with marble, fine porcelain, or premium timber flooring. Choosing a quality Thiral system guarantees not only climatic comfort and long-term security, but also aesthetic and property value appreciation.

The L731 achieves a thermal coefficient of Ud 0.85 W/m²K, certified by the independent ift Rosenheim institute, placing it in the premium tier for thermal insulation. The quadruple glazing (44.1 triplex / 5mm Satinato / 44.1 Triplex) combined with the 34 mm articulated thermal break creates an exceptional thermal barrier, significantly minimizing heat loss and delivering superior energy efficiency.

The L731 has a total system depth of 92 mm, with a frame depth of 80 mm and leaf thickness of 92 mm—standard dimensions that adapt seamlessly to conventional masonry and existing frames. The aluminum structure features 3 mm thickness, ensuring rigidity and durability without compromising thermal performance. This configuration is compatible with both new construction and renovation projects.

The L731 is available in standard configuration with maximum dimensions of 1100×2300 mm, and for single-leaf applications, it reaches up to 1200×2500 mm. If your space requires different proportions, we offer complete customization on request—dimensions and configurations can be tailored to your exact opening measurements. Contact our showroom team to discuss bespoke manufacturing options.

The L731 features 3 EPDM gaskets with multi-grade profile, ensuring multi-point sealing across the entire perimeter. The drainage and runoff system is engineered to efficiently manage rainwater and condensation, protecting the structure and interior. These materials are UV-resistant and withstand temperature fluctuations, guaranteeing lasting protection throughout the product's lifespan.

The L731 uses a specialized quadruple glazing system (44.1 triplex / 5mm Satinato / 44.1 Triplex) composed of laminated glass layers that deliver superior thermal protection and excellent acoustic insulation. The triplex glass ensures safety—upon breakage, the glass remains adhered to the plastic film, preventing sharp fragments and injury. The Satinato finish also provides discreet privacy while maintaining natural light.

The L731 aluminum is naturally corrosion-resistant due to its native oxide layer, requiring only periodic cleaning with water and mild detergent. The quadruple glass is highly durable and low-maintenance—simply wipe with a soft cloth and water. EPDM gaskets have an extended lifespan and don't require frequent replacement with proper installation. With minimal routine maintenance, the L731 maintains its performance and appearance for decades.