Painted aluminium for windows, doors and shading systems

For extruded aluminium window and door frames, fabricators primarily rely on the 6xxx family, particularly EN AW-6060 and 6063. These alloys offer the right balance of strength, excellent extrudability, clean surface quality, and tight dimensional tolerances, making them ideal for slim, load-bearing frames with large glass panels. When it comes to slats, roller shutter profiles, cover shells, and formed strips, 3xxx and 5xxx alloys are the preferred choice. They offer outstanding formability, high corrosion resistance, and reliable paint adhesion during coil coating. Speira supplies these alloys as a bare or pre-coated strip, precisely matched to your production needs – from edge stability and forming tolerance to flat winding for smooth downstream processing.

Aluminium is classified as a non-combustible building material. In Germany, it falls under DIN 4102-1 (A1), while European classification follows DIN EN 13501-1 (typically A1, though some products may be A1/A2 depending on construction). It’s important to distinguish between solid aluminium components and composite materials with a plastic core, as the fire behavior is determined by the composite structure. Pure aluminium frames behave differently from bonded panel systems. For any given project, it is thus the specific construction and installation approach that determine the fire classification. At Speira, we supply pre-material grades suitable for demanding fire protection requirements.

Aluminium is a highly durable and resilient material. When combined with high-quality alloys, corrosion-resistant pretreatment, and pre-coated strip, aluminium roller shutters and windows retain both their function and appearance for decades. They stand up to hail, strong winds, and intense UV exposure without cracking, chipping, or showing significant signs of aging. Maintenance is minimal. Usually, an occasional wash with water and a mild detergent is all that’s needed. The coil-coated surfaces are also abrasion- and UV-resistant, keeping their gloss and providing lasting protection against corrosion.

Coated aluminium offers the complete RAL color range, from minimalist gray tones like anthracite to bold corporate colors. Whether you’re aiming for a matte, satin, glossy, or finely textured finish, the desired look can be precisely achieved, color-matched with long-term stability, and reliably reproduced over time. Speira’s coil coating creates uniform, durable layers on the coil that flex with the material during forming and profiling while preserving the finish’s appearance over the long term.

While aluminium has a higher upfront cost than plastic, it often proves more economical over the long term. Its extended service life, minimal need for repairs, and consistently high-quality appearance help reduce follow-up expenses throughout the product’s lifecycle. Retrofitting is straightforward as well, whether you’re upgrading an older building, replacing damaged plastic components after storm or hail events, or modernizing an existing installation.

In addition, aluminium window frames and shading systems can enhance a property’s value. Their wide range of colors allows them to blend seamlessly with contemporary architecture, increasing the visual appeal for both buyers and tenants.

Our coils are used in surface-mounted and built-on roller shutters, façade and surface-mounted exterior blinds, cover shells for wood-aluminium windows, and various other architectural profiles. We engineer the material properties to ensure that forming, punching, and profiling processes run reliably while the surface maintains its character over the long term. The result is a pre-material that performs consistently in production, delivers a clean, high-quality appearance on the building, and returns to the recycling loop at the end of its lifecycle without loss of quality.

Yes, this is exactly where aluminium shines. Its high flexural rigidity maintains shape integrity even at widths beyond 1.5 to 2 meters, allowing roller shutters to operate smoothly while frames stay slim. Windows made with aluminium deliver delicate sightlines, maximized glass area, and architecture that excels both functionally and visually, even in wind-exposed locations or with wood-aluminium skylight assemblies. Unlike plastic alternatives, aluminium frames are far less prone to warping or gapping. For maximum darkness, selecting the right profile size, precisely matched guide rails, and proper end-position adjustment is key. This ensures reliably dark rooms, even with large-format installations.