Aluminium exterior door L529 made to order

Aluminium exterior door with 92 mm system depth and exceptional thermal performance (Ud 0.85 W/m²K). Quadruple glazing ensures superior heat retention and acoustic comfort.

The L529 is a large-format aluminium exterior door engineered for peak energy performance in demanding climates. With a total system depth of 92 mm and frame depth of 80 mm, it accommodates openings up to 1200×2500 mm in single-leaf configuration, delivering maximum architectural flexibility while maintaining structural integrity under extreme weather exposure.

The construction relies on a 3 mm aluminium profile combined with an articulated 34 mm thermal break that substantially reduces heat transfer across the frame. The sealing system employs three EPDM gaskets running the full perimeter, creating a continuous barrier against water and air infiltration whilst preserving the thermodynamic profile regardless of external conditions.

The quadruple glazing specification — 44.1 triplex / 5 mm satin / 44.1 triplex — is certified by ift Rosenheim with a thermal coefficient of 0.85 W/m²K, positioning this door in the highest thermal insulation category. The middle satin layer provides the visual discretion required at principal entrances, screening direct sight lines without compromising transparency or natural ventilation. Acoustic performance is equally remarkable, benefiting from the thermal mass and sound-dampening properties of the multi-pane glazing system.

The aluminium profile permits a total door leaf thickness of 92 mm, facilitating seamless integration into projects with strict architectural requirements, solar collectors, or other passive systems. Single-leaf operation eliminates the need for excessive interior swing clearance, making it ideal for compact corridors or secondary entries.

This is the reference solution for properties with high energy standards, particularly in regions experiencing severe winters or significant wind exposure. It integrates smoothly into heritage retrofitting projects as well as new builds demanding energy certification compliance (passive house, Nzeb standard).

The Ud coefficient is 0.85 W/m²K (tested according to ift Rosenheim standard), placing this exterior door in the premium energy performance class. The exceptional thermal insulation comes from the 92 mm profile with a 34 mm articulated thermal break and quadruple glazing—ideal for buildings with stringent energy efficiency and comfort requirements.

The L529 is built from aluminium with a 3 mm profile thickness and total system depth of 92 mm. This generous profile dimension accommodates a 34 mm articulated thermal break and three EPDM multi-point seals, maximizing both thermal insulation and airtightness. Aluminium delivers extreme durability, dimensional stability, and premium finish quality in any climate condition.

The door features quadruple glazing configured as 44.1 Triplex / 5 mm Satinato / 44.1 Triplex—combining laminated glass layers with protective film and a neutral interlayer. This composition delivers superior heat retention, significant acoustic comfort through external noise reduction, and enhanced security from the laminated structure. The Satinato finish also offers sophisticated aesthetics with privacy control.

Standard maximum dimensions are 1100×2300 mm, and for larger openings, a single leaf can reach 1200×2500 mm. This door is ordered as a standard production item, but these dimensions accommodate most exterior openings well. For custom sizing beyond these parameters, we recommend contacting our showroom team to assess the optimal solution and delivery timeline.

The L529 with a frame depth of 80 mm is compatible with standard frames and flexible mounting systems, accommodating various masonry thicknesses and insulation levels. Correct installation requires proper sealing of perimeter joints, level mounting, and secure fixing in compliance with local standards. We recommend consulting our showroom's professional installer to ensure long-term adherence and optimal performance of thermal and acoustic barriers.

Aluminium is extremely durable and requires only periodic cleaning with neutral detergent and water—no abrasive products. The triple EPDM seals should be inspected annually for continued airtightness; if degraded, they are easily replaceable. Available finishes include powder coating in various colours, laminate, and veneer—all treated for UV resistance and long-term durability. Premium hardware requires light annual lubrication for smooth operation.