What thickness is typical for architectural aluminium fabrication?

For window cills, wall cappings, and roof flashings, 1.5mm or 2.0mm thickness is typical. For structural brackets or large-format cladding panels, 3.0mm pressed aluminium sheet is recommended to prevent oil-canning (warping) under wind load.

What aluminium alloys are used for bending and folding?

Alloy 1050 or 3103 is typically used for pressed metal folding and flashings because it has excellent ductility (does not crack when bent). For high strength structural brackets, Alloy 5083 or 6082 is preferred.

How is custom aluminium colored?

Aluminium fabrications are finished using industrial electrostatic powder coating. The metal is pre-treated and baked in an oven with polyester powder, matching any standard European RAL color code. Anodising is also available for high-exposure marine architectural details.

Industrial Metal Fabrication

Bespoke Aluminium
Fabrication Services

Sourcing custom sheet metal folding, powder-coated flashings, laser-cut screens, or structural brackets? BuildTrade.ie connects main contractors with industrial fabrication facilities across Ireland and the UK.

Direct Summary: Aluminium fabrication includes custom folding, CNC punching, laser cutting, and powder coating. Common architectural specs require 1.5mm to 3.0mm thickness using Alloy 1050 for standard flashings.

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Fabrication Spec Finder

Configure metal folding specs and alloy grades

Fabrication Product

Sheet Thickness (mm)

Recommended Specification:

Recommended

Alloy GradeAlloy 1050 / 3103 (Excellent Bending)

Typical ApplicationsRoof flashings, window cills, parapet copings.

Lead Time3 - 5 Business Days

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Sheet Metal Fabrication Processes

Industrial fabrication facilities utilize advanced machinery to manufacture architectural cladding and flashing profiles to exact specifications:

CNC Press Brake Folding

Pre-cut aluminium sheets are placed inside computer-controlled press brakes. The machine folds the metal with sub-millimetre accuracy to create custom window cills, copings, fascias, and soffit panels.

Fiber Laser Cutting

For bespoke panel designs, structural brackets, or intricate grilles, fiber laser cutters slice through aluminium sheets up to 10mm thickness, creating highly detailed shapes without heat distortion.

TIG & MIG Welding

Return upstands, end-caps, and gutter boxes are welded by hand using Inert Gas (TIG) welding. This ensures the seams are completely watertight before the product enters the powder coating line.

Aluminium Thickness and Alloy Specs

Selecting the correct material thickness and alloy grade is essential for structural durability:

1.5mm Thickness (Alloy 1050)Ideal for lightweight window flashings, wall cladding trims, and internal profiles. Extremely easy to bend without cracking.

2.0mm Thickness (Alloy 3103)The standard specification for external window sills, parapet cappings, and fascia panels. Offers high rigidity and resists wind deflection.

3.0mm Thickness (Alloy 5083 / 6082)Used for heavy-duty commercial bracketry, load-bearing frames, and large architectural facade panels. Highly resistant to deformation.

Key Facts Checklist for Fabrications

1.Alloy 1050 is the preferred grade for intricate architectural flashing bends and folds.
2.Polyester powder coating is applied electrostatically and baked at 200°C for maximum durability.
3.Industrial fiber lasers cut up to 10mm thick aluminium sheets to within 0.1mm accuracy.

Bespoke Aluminium Fabrication Services