Aluminium exterior door L951 made to order

Aluminium exterior door L951 with exceptional thermal performance Ud 0.85 W/m²K. Sophisticated quadruple glazing system and articulated thermal break for superior insulation.

The L951 door positions itself at the premium tier of exterior solutions, chosen deliberately for projects demanding superior structural strength and thermal performance. The 3 mm aluminium profile, combined with a total system depth of 92 mm, creates a robust construction that marries the linear elegance of aluminium with demanding functionality requirements.

The material foundation is precision-engineered aluminium, treated for weathering resistance and corrosion protection. The system integrates an articulated thermal break of 34 mm, which isolates the interior framework from external thermal influences, effectively eliminating thermal bridging and maintaining interior temperature stability. Three-stage EPDM sealing gaskets form a triple barrier, guaranteeing reliable protection against air and water infiltration.

Thermal performance is certified by ift Rosenheim with a Ud coefficient of 0.85 W/m²K, positioning the L951 among the highest-performing aluminium exterior doors available. The quadruple glazing—composed of 44.1 triplex exterior, 5 mm Satinato centre, and 44.1 triplex interior—elevates energy efficiency while delivering optimal colour rendition and visual privacy. This substantial glazing composition also contributes significant acoustic performance in noise-sensitive environments.

The L951 design accommodates architectural personalisation across multiple dimensions. Standard configurations support up to 1100×2300 mm, while single-leaf solutions extend to 1200×2500 mm. The opening mechanism—swing, sliding, or pivot—adapts to spatial constraints and interior flow requirements without compromising structural integrity.

The L951 is recommended for premium residential projects, corporate environments with elevated comfort standards, and commercial applications where long-term thermal investment delivers tangible energy and comfort returns. Paired with luxury flooring or contemporary finishes, this door creates an architecturally dignified transition that supports both energy performance and the aesthetic value of the entire space.

Ud 0.85 W/m²K represents exceptionally high thermal performance for exterior doors — it means this door loses minimal heat inside, certified by the independent ift Rosenheim institute. The combination of quadruple glazing, 92 mm core depth, and 34 mm articulated thermal break ensures superior insulation, reducing heating costs and guaranteeing thermal comfort year-round.

The L951 door is constructed from aluminium profile with 3 mm thickness, while the 92 mm core is insulated through a 34 mm articulated thermal break separating the outer face from the inner. The structure with a solid 92 mm core and total system depth of 92 mm guarantees maximum rigidity and prevents direct cold transmission through aluminium, maintaining consistency and durability over time.

The L951 quadruple glazing — 44.1 Triplex / 5 mm Satinato / 44.1 Triplex — comprises four layers combining laminated glass (triplex) with intermediate panes and a 5 mm Satinato layer in between. This multi-layer configuration significantly reduces external noise transmission, delivering high-performance acoustic insulation, while the Satinato finish adds a visual privacy dimension. The laminated structure also increases impact resistance and resistance to intrusion attempts.

The standard dimension for L951 is 1100 × 2300 mm, and for a single leaf (pivot opening) maximum reaches 1200 × 2500 mm. Both configurations can be customised based on your masonry needs and spatial architecture — we recommend contacting the showroom team for technical consultation, who will verify frame compatibility and exact dimensions required for your installation.

The L951 door features 3 EPDM multi-point gaskets creating three-way sealing — external perimeter, intermediate and internal — protecting effectively against water, wind and dust infiltration. EPDM gaskets are among the most UV and ozone-resistant, maintaining elasticity and sealing performance even after prolonged weather exposure and temperature fluctuations. Testing at ift Rosenheim confirms compliance with rigorous impermeability standards.

The L951 door is installed with a standard 80 mm depth frame in masonry — brick, concrete, or stone. The 80 mm frame depth adapts to minor wall thickness variations through a screw-fixing system with adjustment shims. We recommend pre-checking the exact wall thickness and plumb level, and the installation team must ensure edge sealing with polyurethane foam and acrylic sealant to maximise thermal and acoustic performance.