Material selection context

6063 extrusions are used for architectural shapes and window and door frames. Specify the exposed faces, surface treatment, colour expectations, protection during transport and dimensional requirements. Structural performance and weather exposure require separate assessment for the actual assembly; an alloy designation alone does not establish compliance.

Acceptance questions

Which controlled drawing and material specification govern the component? What lot traceability and inspection evidence must accompany delivery? Which dimensional or surface characteristics affect the downstream process? Record these requirements before asking a supplier to suggest a material alternative.

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Sources and verification

Selected facts checked 14 October 2026. Source data is reference information, not certification of supplied material.

Hydro • 6063 extrusions — 2026/01 (June 2026) · checked 2026-10-14

Coordinate appearance and fabrication acceptance

Anodized colour and uniformity depend on substrate and preparation. Organic coating acceptance also involves pretreatment, application and curing, with QUALICOAT distinguishing product approvals from production-site licences. Specify exposed faces, viewing conditions, panel orientation and the cutting or forming sequence. A finish name or powder brand does not establish acceptance for a completed façade component.

Source: www.anodizing.org, www.qualicoat.net

Building & architecture

Aluminium for Building & Construction

Durable, low-maintenance aluminium for façades, windows, roofing and structures. Metline Industries supplies architectural extrusions, sheet, coil and composite panel materials to builders, fabricators and façade contractors.

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Key alloys: 6063, 6061, 3003, 3105, 5005
Forms: Extrusions, sheet, coil, plate
Finishes: Anodised, powder coated, PVDF
Benefit: Long life, low maintenance

Overview

Why architects specify aluminium

Aluminium does not rust, needs little maintenance and can be anodised or coated in almost any colour. Its light weight reduces loads on the structure, and extrusion allows complex window, door and curtain wall sections with integrated drainage and thermal breaks.

At the end of a building's life, aluminium can be recovered and recycled without loss of quality, which supports green building certification.

Applications

Where aluminium is used

Curtain walls and façades

6063 extrusions with thermal breaks and anodised or coated finishes.

Windows and doors

Casement, sliding and folding systems in 6063-T5 and T6.

Roofing and cladding

3003 and 3105 coil, plain or colour coated.

Composite panels

3003 and 5005 skins for aluminium composite panels.

Structural elements

6061 and 6082 sections for canopies, walkways and roof structures.

Louvres and sun shading

Extruded blades and frames for solar control.

Alloy selection

Recommended alloys and forms

Alloy	Form	Why it is used
6063-T5 / T6	Extrusions	Windows, doors and curtain walls; excellent finish
6061-T6 / 6082-T6	Extrusions, plate	Load-bearing structures and brackets
3003 / 3105	Coil, sheet	Roofing, rainwater goods and coated cladding
5005	Sheet	Anodised façade panels with a uniform appearance
1100 / 3003	Sheet, coil	Ceilings, flashing and composite panel skins

Why Metline

Supplying building & construction

Complete material packages

Plate, sheet, extrusions, tube and bar for the same project from one supplier.

Grade and temper guidance

Engineering-led advice on the alloy and temper that suit the service conditions.

Documentation

Mill test certificates and inspection paperwork to support your quality system.

Materials

Building & Construction materials

Aluminium Awning Windows Aluminium Bifold Doors Aluminium Bifold Windows Aluminium Casement Window Systems Aluminium-Clad Wood Windows Aluminium Cladding Panels for Facades and Walls Aluminium Curtain Wall Profiles Aluminium Curtain Wall Systems Aluminium Deck Railing Profiles & Components Aluminium Door Systems Aluminium Double Doors Aluminium Double-Hung Windows Aluminium Facade Systems Aluminium Fence & Railing Systems Aluminium Fixed Windows Aluminium Greenhouse Kits, Frames & Profiles Aluminium Hinged Door Systems Aluminium Pergola Systems Aluminium Pergola with Retractable Louvered Roof Aluminium Picket Railing Systems & Component Kits Aluminium Privacy Fence, Gates & Posts Aluminium Sash Windows Aluminium Screen Doors Aluminium Skylights & Rooflights Aluminium Slat Fencing System Aluminium Sliding Door Systems Aluminium Sliding Glass & Patio Doors Aluminium Sliding Windows Aluminium Soundproof Window Systems Aluminium Storefront & Shop Front Systems Aluminium Sunroom Systems & Prefab Glass Sunroom Kits Aluminium Sunshade Systems Aluminium Window Screens, Screen Frames & Mesh Aluminium Window Systems Commercial Aluminium Doors Commercial Aluminium Fence & Railing Systems Energy-Efficient Aluminium Windows Hardtop Louvered Roof Aluminium Gazebo Insulated Aluminium Windows System Outdoor Aluminium Solutions Powder Coated Aluminium Windows Slimline Aluminium Doors Slimline Aluminium Windows System Aluminium Windows Thermal Break Aluminium Windows Unitized Curtain Wall

FAQ

Building & Construction questions

Which aluminium alloy is used for windows?

6063 in T5 or T6 temper is the standard window and door alloy, thanks to its excellent extrudability and finish.

Is aluminium cladding durable?

Yes. With anodising or a quality coating such as PVDF, aluminium cladding can last for decades with minimal maintenance.

Planning a building project?

Send us the profiles, sheet sizes, finishes and quantities and we will quote.

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