Aluminium exterior door L531-1 made to order

Aluminum exterior door with slim profile and exceptional thermal performance Ud 0.85 W/m²K. Quadruple glazing with articulated thermal break ensures energy efficiency and weather security.

The L531-1 is a high-performance aluminum exterior door designed for residential and commercial spaces demanding superior thermal insulation. Its refined construction and slim 80 mm profile ensure discrete visual integration into any façade type.

The aluminum profile, 3 mm thick with an articulated 34 mm thermal break, provides structural stability and consistent thermal protection. The quadruple glazing system—comprising 44.1 triplex, 5 mm satin glass, and 44.1 triplex—combines optical clarity with acoustic protection and energy efficiency. The total leaf thickness of 92 mm and overall system depth of 92 mm guarantee homogeneous thermal behavior across the entire surface.

Thermal performance Ud 0.85 W/m²K (certified by ift Rosenheim) positions this door among the most efficient exterior solutions available. Triple EPDM gasket sealing ensures flawless weather resistance throughout the product's lifespan, minimizing heat loss and protecting against water and wind infiltration.

L531-1 supports standard dimensions up to 1100 × 2300 mm for light-duty openings, with expansion possible to 1200 × 2500 mm for single leaves with high performance. The modular design allows adaptation to diverse spatial requirements—penthouses, single-family residences, high-end commercial facilities.

This door integrates seamlessly into contemporary and blended architectural styles, complementing minimalist window systems and projects prioritizing transparency and efficiency. Pairing with polished marble, solid oak, or polished concrete flooring confirms the premium character of the space.

The Ud coefficient is 0.85 W/m²K, certified by the German ift Rosenheim institute, placing it in the top thermal performance category. This is achieved through the quadruple glazing system and articulated 34 mm thermal break, which virtually eliminate heat transmission and deliver measurable energy savings.

The door has a total depth of 92 mm, with frame 80 mm and 3 mm aluminium leaf thickness. This profile allows flexible installation in standard exterior walls (20–25 cm), with horizontal and vertical adjustment through quality hardware. Proper installation requires elastic sealing around the perimeter and appropriate fixings.

The 44.1 triplex / 5 mm Satinato / 44.1 triplex system features four layers of laminated and frosted glass. Each triplex layer dampens acoustic vibrations (reducing exterior noise by 30–35 dB) and resists impact damage. The frosted middle pane adds visual privacy and contemporary style.

Standard maximum dimensions are 1100×2300 mm, with a single leaf reaching 1200×2500 mm. Any size can be customized to order within the structural limits of the articulated aluminium system. The showroom team calculates exact sizing based on your wall and opening specifications.

The door features 3-point EPDM gaskets, ensuring complete sealing against water, wind, and thermal infiltration. EPDM (ethylene-propylene-diene monomer) is industry-standard, UV and ozone-resistant, maintaining elasticity for 15–20 years. Periodic checks and light silicone lubrication extend service life.

The 92 mm total profile is 20–30% slimmer than traditional systems (120–140 mm), thanks to the efficient articulated thermal break. This design maximizes natural light transmission and delivers contemporary aesthetics without sacrificing thermal isolation – in fact, the 0.85 Ud performance exceeds European comfort standards.