Aluminium exterior door L311 made to order

Aluminium exterior door with contemporary profile and superior thermal insulation. Quadruple glazing system and triple sealing for maximum performance.

The L311 exemplifies cutting-edge engineering in aluminium exterior door systems. Engineered with a total system depth of 92 mm and a robust 80 mm frame profile, this door combines elegance with functionality for main entrances in contemporary residential and commercial buildings.

Material composition reflects meticulous attention to durability and energy efficiency. The 3 mm aluminium is complemented by an articulated 34 mm thermal break, which substantially reduces heat conductivity. The quadruple glazing system — featuring 44.1 mm triplex panes, a 5 mm Satinato insert, and 44.1 mm triplex panes — delivers exceptional thermal insulation alongside meaningful acoustic attenuation. Triple EPDM gaskets ensure complete weather-tightness under wind and water exposure.

The Ud coefficient of 0.85 W/m²K (certified by ift Rosenheim) positions this door in the highest performance category, comparable to contemporary European passive building standards. Resistance to air leakage and water penetration, combined with acoustic isolation, makes L311 an ideal choice for buildings in congested urban zones or with demanding climatic requirements.

Door geometry accommodates standard sizes up to 1100×2300 mm, with single-leaf configurations available to 1200×2500 mm. This sizing flexibility ensures compatibility across diverse architectural approaches — from traditional renovations to contemporary minimalist designs.

L311 integrates naturally into spaces that value geometric clarity and meticulous construction detail. Suited for energy-conscious residences, premium commercial lobbies, or residential projects with high acoustic standards, this door transforms the entrance into a statement of quality and attentiveness to interior comfort.

With a thermal coefficient Ud of 0.85 W/m²K (ift Rosenheim certified), the L311 achieves premium-class insulation performance. The articulated 34 mm thermal break combined with quadruple glazing totalling 92 mm thickness significantly reduces heat loss, delivering measurable savings on your annual heating bills.

The quadruple glazing (44.1 triplex / 5 mm Satinato / 44.1 triplex) delivers exponentially superior thermal and acoustic insulation compared to standard double glazing. The precisely engineered layers with middle-mounted Satinato glass provide maximum protection against heat loss and external noise. This multi-layer system measurably reduces energy consumption while enhancing interior comfort.

Yes, the L311 can be ordered in custom dimensions up to 1200×2500 mm for single-leaf configuration, offering maximum flexibility for non-standard openings. For projects requiring special dimensional specifications, our technical team can evaluate dual-system configurations or profile adaptations. Contact our showroom for detailed specifications and custom quote.

The L311 features three strategically positioned EPDM gaskets within the aluminium frame, creating multi-point perimeter sealing. EPDM (ethylene propylene) resists extreme temperature fluctuations, UV exposure and water contact while maintaining elasticity and adhesion for 15–20+ years. The multi-point sealing system with 92 mm profile depth prevents water and air infiltration across all climatic conditions.

The L311 with 80 mm frame depth and 92 mm total system depth installs readily in standard brick and plasterboard openings using adjustable anchoring system. The frame must be precisely levelled horizontally and vertically before fixing, and the installation gap is sealed with quality polyurethane foam for weatherproofing and stability. For non-standard or thick masonry, special adapters may be required; we recommend consulting authorised installers for complex projects.

The L311 aluminium door is available in spray-applied paint finishes, anodising, or wood/metal-effect finishes according to available colour palette. For optimal architectural integration, we recommend viewing the colour collection at our showroom. Regular maintenance consists of cleaning with lukewarm water and mild detergents, avoiding abrasives; EPDM gaskets should be inspected annually. Anodised aluminium resists corrosion excellently and requires no repainting, maintaining colour for 15–20 years.