CORRUGATED ROOFING IRON & CLADDING | BAY OF PLENTY
Built for New Zealand. Priced for every Kiwi.
Big builders get big discounts at the big box stores. We give that same discount straight to you, on heavier 0.55mm G550 Iron in Satin Jet Black.
01
BETTER QUALITY
0.55 mm G550 steel with AZ150 coating, independently tested by SGS.
02
LOWER PRICES
Trade-level pricing for every customer, whether it’s one shed or a whole build.
03
FREE DELIVERY
Free across Bay of Plenty and Waikato Zone on orders over $1,000.
Heavier iron than standardd retail.
Most hardware-store iron is 0.40 mm. Ours is 0.55 mm, a gauge usually only available as a trade special order. One sheet size, two profiles.
Corrugate
The classic Kiwi curve. Timeless on homes, sheds and character builds.
Five rib
Bold, crisp lines for a modern look on contemporary homes and commercial builds.
Satin Jet Black.
We stock one colour, and we chose it for a reason. A low-gloss satin black looks better for longer and suits almost any design.
- Hides imperfections. Less glare, so minor dents and ripples don't catch the light.
- Pairs with anything. Timber, concrete, white weatherboard, stone or steel.
- Modern, never tacky. Clean and understated in any setting.
Residential
A crisp, modern roofline for new builds and renovations.
Commercial
Durable cladding that pairs with concrete and glass.
Farm & lifestyle
A tidy shed that blends into the landscape.
Thicker iron. Wider spans. Less framing.
Thicker steel spans further between supports. Published NZ span tables for G550 corrugate allow roughly 25% wider purlin spacing at 0.55 mm than at 0.40 mm.
Indicative figures from published NZ manufacturer span tables for G550 corrugate, restricted-access roofs up to 1.5 kPa wind load. Actual spacing depends on wind zone, access and design. Confirm with your designer or the NZMRM Code of Practice.
OUR PROMISEBest quality. Best price.
Corrugated iron is an essential building product. Our mission is simple: bring the price down for every Kiwi, without ever compromising on quality.
Lean by design. Savings passed on.
We're a small, nimble team built to do one thing well. Every cost we don't carry is a saving we hand to you.
Small expert team
No layers of management or sales staff. You deal directly with people who know the product.
Low overheads
No showroom, no retail floor, no big-store markup. Just quality iron at a fair price.
Focused range
One premium sheet, two profiles, one proven colour. Lean stock keeps our costs, and your price, down.
Specified to the standards that matter.
Bay of Plenty based. Free delivery across our zone.
We're based in the Bay of Plenty. Orders over $1,000 are delivered free anywhere inside our delivery zone.
- NorthTauranga & Katikati
- WestHamilton
- EastWhakatāne
- SouthTaupō
delivery on orders over $1,000 inside the zone. Outside the zone or under $1,000? We'll quote delivery with your order. Pickup also available by appointment.
Katikati
Whakatāne
How many sheets do you need?
Add each roof face with its own size and pitch. We'll work out sheets including side laps, end laps and hip cuts. Every sheet is 4.8 m × 920 mm.
Sheet settings
Side lap is the overlap between neighbouring sheets. End lap only applies when a roof face is longer than 4.8 m.
Roof faces
Eave length runs along the gutter. Run is the flat (plan) distance from gutter to ridge, including overhang. Use hip end for triangle faces and hip side for trapezoid faces, each with its own pitch.
An estimate only. Final quantities depend on flashings, penetrations and your installer's layout. We'll check it with you before you order.
Know your roof before you order.
Every roof is made of faces. Measure each one, and we'll work out the sheets, including the overlaps.
Roof faces, seen from above
A simple gable roof has two rectangle faces. A hip roof has two trapezoid hip sides and two triangle hip ends. Add each face to the calculator separately, with its own pitch.
Run and pitch, seen from the side
The run is the flat distance from the gutter to the ridge (include any overhang). The pitch is the roof angle. From these we work out the real sheet length up the slope.
Side lap and end lap
Sheets overlap so the roof stays watertight. The calculator allows for both: the side lap reduces how much width each sheet covers, and end laps are added automatically on faces longer than 4.8 m. Sheets are laid with the upper sheet over the lower one, so water runs off, not in.
- Measure the eave length of each face along the gutter.
- Measure the run, the flat distance from gutter to ridge. Your plans usually show this.
- Find the pitch on your plans, or use a level app on your phone.
- Enter each face in the calculator and send us the result for a quote.
See what you could save.
Send us your sheet count and site location. We'll come back with a trade-level price.