Corner Flashings in Auckland — Custom Made & Powder Coated

What Are Corner Flashings?

Corner flashings are formed metal angle sections that cover the junctions where two wall planes meet. On buildings with metal cladding, fibre cement, or other sheet-based cladding systems, the corner joints are vulnerable points where water can penetrate if not properly detailed. A corner flashing provides a continuous, pre-formed metal cover that overlaps both cladding faces and seals the corner against wind-driven rain.

There are two types. External corner flashings cover the outside corners of buildings — the protruding corners where two wall faces meet. Internal corner flashings (also called angle flashings or return flashings) cover the inside corners where two wall planes meet at a concave junction. Both types come in standard 90-degree angles and can be folded to other angles for non-orthogonal buildings.

Because corner flashings are often visible, colour matching to the cladding or contrasting as an architectural feature is common. We powder coat to any specification.

Where Are Corner Flashings Used?

• External corners on buildings with profiled metal or sheet cladding
• Internal corners at wall-to-wall junctions on commercial and industrial buildings
• Parapet wall corners where two parapet planes meet
• Around column wraps where sheet cladding meets a structural column
• At re-entrant corners on complex building geometries
• At the corners of architectural feature elements — blade walls, fins, and signage panels

Materials Available

We manufacture corner flashings in the following materials:

• Stainless Steel — superior corrosion resistance, ideal for coastal, commercial and residential applications
• Galvanised Steel — traditional zinc-coated steel for applications where painting or coating will be applied
• Aluminium — lightweight with excellent corrosion resistance, popular for coastal buildings and powder-coated finishes
• Colorsteel — pre-painted steel in standard colours for integration with pre-painted cladding systems

Profile Options

We offer both standard profiles and custom-made to spec. We manufacture corner flashings to drawing or sample. Key dimensions are the face widths on each side (to suit the cladding panel width and lap requirement), the corner angle, and any return or kick-out at the base. Standard 90-degree internal and external corners are common, but we fold to any angle.

Colour Options

Powder coating is available on all steel and aluminium corner flashings. A colour-matched corner flashing creates a clean, seamless finish; a contrasting colour can be used as a deliberate architectural detail. Options include:

• Colorsteel colour range — Karaka, Ironsand, Ebony, Grey Friars, Sheerstone, Dune, Gull Grey, Thunder and others
• Resene colour matching
• Dulux colour matching
• Full RAL colour range
• Custom colour matching from a physical sample

Who Uses Corner Flashings?

Our corner flashing customers include:

• Builders — detailing metal-clad walls on new residential and commercial builds
• Architects and designers — specifying colour-matched or feature corner details
• Cladding installers — needing custom corner angles that standard stock doesn't cover

NZ Building Code Considerations

Flashings play a critical role in meeting the weathertightness requirements of the New Zealand Building Code. Corner flashings must overlap the cladding sufficiently on each face to prevent water ingress, and must be compatible with the sealant and backing used at the junction. Always consult your building consent documentation for specific requirements.

Related Flashings

Corner flashings are typically used alongside these other flashing types:

• Parapet Cappings — for the tops of parapet walls where corner flashings turn up
• Window Flashings — for head, jamb, and sill details at openings in the same wall
• Cover Flashings — for movement and expansion joints in the same wall
• Drip Edges — for the base of walls and cladding above gutters

Frequently Asked Questions