Aluminium exterior door L950 made to order

Premium aluminium exterior door with high-performance thermal insulation and quadruple glazing for exceptional energy efficiency. System depth 92 mm, ift Rosenheim certified with Ud coefficient of 0.85 W/m²K.

The L950 exterior aluminium door delivers a contemporary and durable solution for thermal and acoustic protection in residential and commercial properties. Built on a structured profile system with 92 mm total depth, it combines clean contemporary lines with certified thermal insulation performance. The solid aluminium profile, 3 mm thick, ensures rigidity and long-term durability.

The construction strategy revolves around an articulated thermal break—a 34 mm insulating barrier strategically positioned within the frame profile to minimise heat conductivity and energy loss. A three-stage EPDM gasket system provides robust sealing against water infiltration and air drafts. The quadruple glazing system (44.1 triplex / 5 mm satin glass / 44.1 triplex) delivers superior thermal insulation whilst offering partial privacy through the treated glass effect.

Performance is validated by ift Rosenheim certification, with a Ud coefficient of 0.85 W/m²K—a remarkably low value for an exterior door. The 92 mm leaf thickness and 80 mm frame depth contribute significant thermal mass, enhancing resistance to temperature fluctuations and external noise reduction. The articulated thermal break and three-stage sealing system deliver high performance ratings for wind resistance and acoustic isolation.

With standard dimensions up to 1100×2300 mm and expandability to 1200×2500 mm for single leaves, L950 adapts seamlessly to diverse architectural configurations. Dimensional flexibility and glazing options—transparent or semi-opaque finishes—enable customisation to suit individual project requirements. The system depth of 92 mm facilitates integration into exterior walls without compromising interior space.

This exterior door is recommended for contemporary homes, commercial buildings, and renovations where thermal efficiency and acoustic performance are priorities. It performs exceptionally well in north-facing exposures or regions with severe climate conditions, where year-round energy performance directly impacts long-term comfort and utility costs.

A Ud value of 0.85 W/m²K indicates minimal heat loss through the door, certified by ift Rosenheim testing — Europe's gold standard for thermal performance. Practically, this means lower heating bills, consistent comfort without cold draughts, and compliance with current energy efficiency regulations for buildings. It's the performance level expected from a premium exterior door.

The 92 mm depth accommodates the 34 mm articulated thermal break, the quadruple glazing system (44.1+5+44.1), and load-bearing hardware, all integrated into a rigid 3 mm aluminium profile. This dimension ensures structural stiffness and dimensional stability even for large openings (up to 1200×2500 mm), preventing warping or vibration over time. Rigidity is essential for an exterior door's durability.

The glazing consists of two triplex units (44.1 each) with 5 mm satin glass between them, creating an insulating air chamber. Each triplex is made of laminated glass (4+4+3.1 mm), delivering superior thermal and acoustic insulation plus safety if broken. This rare configuration combines premium energy performance with acoustic comfort and structural safety in one system.

Standard dimensions are the most requested and optimized for installations in existing construction — the L950 width fits easily into typical frames. Maximum single-leaf size (1200×2500 mm) is available on special order and allows larger openings without needing double leaves. Both options are possible but require consultation with our design team to ensure compatibility with your existing masonry and structural requirements.

An articulated thermal break of 34 mm is a hybrid system combining low-conductivity materials (usually polyamide) with mechanical joints that isolate the warm outer profile from the cold inner one. This prevents heat transfer by 99% and virtually eliminates condensation risk on the interior edge even in harsh winter conditions. It's vastly superior to simple linear thermal breaks, which provide less isolation.

Installation involves mounting directly into the existing frame via side and threshold anchors, with adjustment options for perfect levelling. The 80 mm frame depth is compatible with modern frames and retrofit installations. For older or non-standard geometries, we recommend precise measurement and technical consultation with our team before ordering. Professional installation ensures proper multi-point sealing and optimum thermal performance.