Aluminium exterior door L401 made to order

Aluminium exterior door with articulated thermal break and quadruple glazing, engineered for superior thermal performance (Ud 0.85 W/m²K). Robust and elegant solution for premium entrances.

Model L401 represents a premium exterior access solution designed for residential and commercial projects requiring superior thermal insulation. The aluminium construction with 80 mm profile frame ensures structural rigidity combined with contemporary minimal finishes. The system positions itself in the premium range through a Ud coefficient of 0.85 W/m²K, certified by ift Rosenheim testing institute, guaranteeing superior climate comfort and reduced energy consumption.

The constructive structure is based on an articulated thermal break with 34 mm insulation space for efficient thermal performance. The aluminium profile, 3 mm thick, is internally reinforced for structural stability and long-term durability. The quadruple glazing, comprising two 44.1 mm triplex frames with 5 mm satin glass interlayer, provides exceptional acoustic insulation and solar protection. Three-stage EPDM sealing gaskets guarantee permanent airtightness under extreme climatic conditions.

Thermal performance of this model allows reduction of heat loss by up to 60% compared to conventional models, certified to European standards. The 92 mm total profile depth provides ample space for insulation and permits installation in masonry of varying widths. The structural resistance of triplex glazing ensures mechanical protection and impact safety.

The L401 door accommodates standard dimensions up to 1100×2300 mm for two-leaf installations, and up to 1200×2500 mm for single leaves. It can be configured with single or double swing opening systems, adapted to project requirements. Aluminium finishes allow application of custom RAL colours, enabling precise aesthetic integration into facade architecture.

Recommended for modern family homes, premium offices, and commercial spaces where thermal insulation and acoustic comfort are priorities. The combination of articulated profile and quadruple glazing makes it ideal for temperate or cold climates and for facades exposed to noise pollution. It integrates naturally into contemporary and traditional projects with high energy efficiency requirements.

The Ud coefficient of 0.85 W/m²K (certified by ift Rosenheim) is exceptional for exterior doors and ensures minimal heat transfer. This performance is achieved through the articulated thermal break of 34 mm combined with the quadruple glazing system. Concretely, this translates to significantly lower heating losses and superior thermal comfort near the entrance, regardless of season.

The quadruple system consists of four glass layers structured as 44.1 triplex / 5mm Satinato / 44.1 triplex — three triplex layers with a middle laminated security glass layer. This delivers superior thermal and acoustic insulation plus significantly greater mechanical resistance than standard double glazing. The frosted middle layer also ensures refined aesthetics with uniform light diffusion.

Standard dimensions are 1100×2300 mm, but the system also accommodates a single-leaf door up to 1200×2500 mm. For any other size or special configuration (double doors, non-standard dimensions, custom heights), we recommend a technical consultation with our team — the L401 is fully customizable based on your requirements and building constraints.

The three EPDM seals create a multi-point barrier that not only protects against water and air leakage, but also functions as sound absorption material for external noise. The 3 mm aluminium profile, combined with the thermal break and quadruple glazing, amplifies this acoustic effect. The result is a considerable reduction of outdoor noise (traffic, construction, etc.) and complete protection against rain and wind regardless of pressure or direction.

The total system depth is 92 mm, while the frame opening is 80 mm — meaning the L401 requires a wall opening of at least 92 mm depth for proper installation and optimal sealing. If the wall is thinner (< 80 mm), partial external mounting is possible using brackets and filler materials. For a precise assessment and solution tailored to your construction, we recommend an on-site consultation.

The aluminium profile is corrosion-resistant and requires no maintenance painting — periodic cleaning with water and mild detergent is sufficient. The quadruple glass with the Satinato middle layer is scratch-resistant and cleans easily. EPDM seals should be inspected annually and possibly rejuvenated with silicone spray if minor cracks appear. The system is designed for a lifespan of 30+ years with minimal maintenance — aluminium does not fade and glass retains its clarity and thermal insulation properties.