Galvanised Flat Sheet

Galvanised flat sheet is a heavy-duty zinc-coated steel sheet for fabrication and construction. It is the go-to material for trades making custom flashings, box gutters, rainheads, HVAC ducting and wall cladding, because it is highly malleable and easy to work with. The zinc coating forms a barrier against rust and corrosion, which is what makes it suitable for both exposed outdoor roofing and interior fabrication work.

Key Features

• Heavy-duty zinc coating for strong corrosion resistance
• Highly malleable and easy to cut, fold and form
• Lengths available in 1200mm, 1800mm, 2400mm and 3000mm
• Trade widths of 1220mm and 1500mm
• Thicknesses from 0.55mm to 3mm for light to heavy-duty work
• Trade-quality finish with a smooth, uniform surface

Specifications

• Product: galvanised flat sheet
• Lengths: 1200mm, 1800mm, 2400mm, 3000mm
• Widths: 1220mm and 1500mm
• Thicknesses: 0.55mm to 3mm
• Coating: heavy-duty zinc
• Application: custom flashings, box gutters, rainheads, ducting, cladding

How To Use It

Cut the sheet to size with tin snips or a guillotine, then fold and form it for the job. The zinc coating stays intact through cutting and folding, so the sheet keeps its corrosion resistance at the edges. Use it to fabricate custom flashings, fold a box gutter, or form the pieces of a rainhead. For a colour-matched finish, use a Colorbond flat sheet instead.

Applications

• Custom flashing and box gutter fabrication
• Rainheads and downpipe transitions
• HVAC ducting and industrial guards
• Roofing and architectural cladding

What You Need To Complete The Job

For a colour-matched flashing use a Colorbond flat sheet or a wide flat sheet, and fold the finished pieces with a proper brake. Browse the Custom Flashing range for pre-formed profiles.

Frequently Asked Questions

What is galvanised flat sheet used for?

It is used for fabrication, from custom flashings and box gutters to rainheads, ducting and cladding. The zinc coating protects it outdoors and the sheet is easy to cut and form.

What thickness should I use?

Thinner sheets from 0.55mm are good for flashings and lighter fabrication, while up to 3mm is for heavy-duty structural work. Match the thickness to the load and exposure of the job.

Does cutting affect the corrosion resistance?

The zinc coating stays intact on the cut edges for most jobs, and exposed edges can be touched up with a zinc-rich paint where the coating is scored. The sheet is designed to be cut and formed on site.

Can I order a custom size?

The stock range covers the standard trade sizes, and bulk or custom sizing is available on request. Talk to the team for a quote on a non-standard size.

Can I order for delivery or pickup?

Yes. You can order online and choose Australia-wide delivery or pickup from our Truganina trade counter in Melbourne’s west. Delivery windows depend on your postcode, and we send a confirmation once your order is ready. For any questions call (03) 93941400 or email orders@singhroofingsupplies.com.au.