Industries · 01

Aluminum extrusions for window, door and façade systems

Custom aluminum profiles for window, door, storefront and façade systems, with support for thermal break assembly, finishing and fabrication. Each program is managed around your drawings, specifications and application requirements.

Send a drawing → Thermal break · anodizing · powder coating · fabrication

Profiles

What we extrude for fenestration

Window, door and curtain wall systems are the most profile-dense products BNA supplies. A single system typically needs six to twelve related sections that all have to fit each other.

Thermally broken mullions and transoms

Box sections with polyamide strip races on both faces, assembled, knurled and crimped before finishing so the composite arrives ready to cut.

Glazing beads and snap-on covers

Thin-wall clip profiles where the springback of the leg is what decides whether the bead stays on the frame in year fifteen.

Door frame and threshold profiles

Heavier sections carrying hinge and lock hardware, held to tighter dimensional tolerance where the ironmongery lands.

Curtain wall pressure plates and caps

Long, slender sections that need straightness control as much as cross-sectional accuracy.

Sub-frames, couplers and flashings

The unglamorous half of a system, and the half that is usually late when it is bought separately.

Specification

Typical fenestration specification

The thermal break is not a separate purchase. Strip insertion, knurling and crimping happen inside the program, so the composite section is inspected as one part instead of arriving as two that have to be married on your floor.
Color that holds across a facade. Anodizing and powder coating are batched against an approved reference rather than re-matched per shipment — a facade shows every shade you missed.
Systems, not sections. Programs are quoted as a whole system, so couplers and flashings do not turn up eight weeks after the mullions.

Alloy and temper	To your specification — send the alloy and temper the system calls for, or the application and we will work back from it
Thermal break	Thermal insulation bar assembly, carried out inside the program so the composite section arrives as one part
Finishes	Anodizing in natural, silver, gold, bronze, brown and black plus polished and sand-effect; powder coating in standard RAL, special colors and gloss levels
Cosmetic class	Architectural — the visible faces are specified separately from the concealed ones
Fabrication	Cut-to-length, 45 and 90 degree cutting, hardware prep punching, drainage slotting, protective and adhesive tape application
Inspection	Profiles are inspected and packed to your handling requirements before release

Answers

Window, Door & Façade Systems, answered

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What is a thermally broken aluminum profile?

A thermally broken aluminum profile is two aluminum sections joined by a low-conductivity polyamide strip, so heat cannot travel straight through the frame. The strip is rolled into knurled races in each half and crimped, which makes the assembly structural as well as insulating — the composite behaves as one section once it is crimped.

Which alloy is used for window and door profiles?

6063-T6 is the industry convention for architectural window, door and facade profiles. It extrudes cleanly into complex thin-wall shapes and anodizes to a consistent, repeatable finish, which matters more on a visible facade than the extra strength a 6061 would bring. Send us the alloy and temper your system calls for, or the application, and we will confirm it.

Can you match an existing window system profile?

Usually, yes. Send a physical offcut of the existing section or a dimensioned drawing; the die is developed from that, and first-article samples are approved against your sample before production runs.

Other sectors

The same discipline, a different die

Have a profile in mind?

Send us your drawing, sample or specifications and tell us what the program requires.