Aluminium exterior door L231 made to order

L231 aluminium exterior door with 92 mm system depth and quadruple glazing, delivering exceptional thermal insulation (Ud 0.85 W/m²K) and premium acoustic performance. Engineered with articulated 34 mm thermal break for superior climate control.

The L231 exterior door is a premium access solution for contemporary buildings demanding high-performance energy efficiency and enduring durability. Manufactured from anodised aluminium profile, this door positions itself in the performance segment for upscale commercial and residential spaces where thermal insulation and aesthetic integrity are non-negotiable.

The system profile achieves a total depth of 92 mm, with frame and leaf both precisely engineered to 80 mm and 92 mm respectively, faced with 3 mm machined aluminium. The articulated 34 mm thermal break represents sophisticated engineering that effectively interrupts conventional thermal bridges, allowing aluminium to perform as a premium door material. Sealing is assured by three high-density EPDM gaskets, calibrated to withstand years of intensive use and extreme climatic cycles.

Thermal performance certified by ift Rosenheim (Ud 0.85 W/m²K) places this door in the elite category — comparable to rigid PVC or composite systems, yet with the aesthetic and structural advantage of aluminium. The quadruple glazing — a refined composition of 44.1 triplex, 5 mm Satinato glass, and again 44.1 triplex — delivers both exceptional acoustic insulation and controlled solar protection, reducing summer cooling loads significantly.

Standard maximum dimensions (1100×2300 mm) and single-leaf option up to 1200×2500 mm ensure adaptability across diverse architectural expressions — from primary residences to commercial facades requiring transparency and performance simultaneously. The system accommodates both swing and sliding configurations, tailored to spatial requirements.

Optimal for Passivhaus-certified homes, high-performance renovations, and buildings pursuing rigorous energy standards. Integrated within aluminium glazing systems or facades of architect-grade concrete and masonry, L231 commands presence through restrained proportions and engineering refinement.

The Ud coefficient of 0.85 W/m²K (ift Rosenheim certified) results from the articulated 34 mm thermal break combined with quadruple glazing (44.1 triplex / 5mm Satinato / 44.1 triplex), which eliminates thermal bridges and reduces heat loss. The 92 mm profile depth and triple-point EPDM sealing ensure top-tier thermal performance in its class.

The quadruple glass comprises 44.1 triplex on both sides (with 5mm Satinato in the middle), providing high impact and mechanical load resistance. The triplex is bonded and laminated—if subjected to extreme force, it remains secured to the aluminium frame, preventing unauthorised opening. For certified RC2/RC3 break-in protection, consult our showroom team.

Yes, the L231 model accepts custom orders up to 1200×2500 mm for a single leaf. For standard openings, maximum dimensions are 1100×2300 mm. If you need a wider opening, a dual-leaf configuration is possible, but this requires consultation with our design team to ensure balance and thermal performance.

Installation requires removing the old frame (if present) and preparing the opening to accommodate the 92 mm profile. The aluminium frame is anchored with fasteners and polyurethane foam into the brick or concrete wall. If you wish to retain existing wooden trim elements for aesthetic continuity, a mixed solution can be arranged following a site survey. We recommend consulting our installation team before placing your order.

The 3 mm aluminium profile is available in anodised finishes (standard silver or custom) or powder-coated RAL colours, depending on preference and architectural integration. Maintenance is minimal: periodic cleaning with warm water and neutral detergent, avoiding abrasive products. The anodised film protects against corrosion and UV exposure, and lacquered finishes may require light polishing after 5–10 years of intense sun exposure.

Yes, with a Ud coefficient of 0.85 W/m²K, this door is optimised for cold climates with minimal heat loss and superior acoustic insulation (quadruple glazing with Satinato spacer). The three-point EPDM sealing withstands wind pressure and ensures complete insulation, even in extreme conditions. For areas with very intense wind (regularly above 80 km/h), consult with the designer regarding possible reinforcement at frame and hardware level.