More Information: COLORBOND® Corrugated Roofing Sheets .42 BMT

Our genuine COLORBOND® Corrugated Roofing Sheets in .42 BMT are one of the most popular choices for Australian homes, sheds, garages, patios and carports. Manufactured from premium BlueScope steel, this traditional corrugated roofing profile combines the classic Australian look with reliable everyday performance.

If you need corrugated roof sheets cut to size, available in genuine COLORBOND® colours and delivered fast, this is the practical go-to option for residential and light commercial projects.

Why Choose COLORBOND® Corrugated Roofing Sheets?

• ✔ Classic corrugated roofing profile trusted across Australia
• ✔ Made from genuine BlueScope COLORBOND® steel
• ✔ Custom cut to your required lengths
• ✔ Strong, lightweight and easy to handle
• ✔ Suitable for re-roofing, new builds and renovations
• ✔ Wide range of genuine COLORBOND® colours available

Is .42 BMT Right for Your Project?

.42 BMT is the most common thickness selected for standard residential roofing where normal spanning conditions apply. It offers an excellent balance of strength, weight and value.

Many customers choose .42 BMT for:

• ✔ Homes and extensions
• ✔ Sheds and garages
• ✔ Patios and verandahs
• ✔ Carports
• ✔ General replacement roofing

If your build requires heavier specifications, higher wind ratings or engineering requirements, .48 BMT or a concealed-fix profile like COLORBOND® KLIP-LOK® 700 Hi-Strength roofing may be worth considering.

.42 BMT vs .48 BMT - Which Should You Choose?

The choice between .42 BMT and .48 BMT corrugated roofing comes down to spanning requirements, wind exposure and project type:

• ✔ .42 BMT (this page) - Standard residential. Right for ~90% of Australian homes, sheds, garages, patios and carports. Lighter, easier to handle, more cost-effective.
• ✔ .48 BMT - Heavier-duty. Choose for cyclonic wind zones (C and D per AS 1170.2), wider purlin spacings, commercial/industrial applications, or where engineering specifies. Buy .48 BMT corrugated COLORBOND®.

If your build engineer or roofing plan doesn't specify, .42 BMT is the standard choice.

Cyclonic Zones & Wind Ratings

Australian roofing standards (AS 1170.2) define wind regions A through D. .42 BMT corrugated roofing is suitable for the majority of Region A and B builds. For Region C (most of Queensland coast north of Bundaberg, Western Australia coast north of Geraldton) and Region D (Northern Territory, far north Queensland), specifications often require .48 BMT, tighter purlin spacing and additional fasteners - check with your engineer before ordering.

Sheet Coverage & Custom Lengths

Each corrugated sheet provides 762mm effective cover. This is the usable installed width after sheet overlap and matters when calculating how many sheets you need.

We cut sheets to the lengths you enter when ordering online - reducing waste, minimising joins and speeding up installation.

Full Specifications

Genuine COLORBOND® Colours Available

Choose from Australia's most recognised steel roofing colours including Monument®, Woodland Grey®, Surfmist®, Basalt®, Shale Grey® and more.

Many customers match roof sheets with gutters, fascia and roof flashings for a cleaner finished look. Others choose alternative profiles like COLORBOND® TRIMDEK® roof sheets for different aesthetic and spanning requirements. Browse the full COLORBOND® colour range.

Built for Australian Conditions

COLORBOND® steel is designed for Australian conditions and trusted nationwide for long-term durability when selected correctly and installed to specification.

Corrugated roofing can last 50 years or more when made from quality steel and installed correctly - a long-term roofing option for Australian homes and sheds.

For coastal or high-exposure environments, always check suitability before ordering.

Fast Delivery Available

We deliver COLORBOND® roofing sheets across VIC, NSW, QLD, ACT and TAS. Every order is cut after purchase to your selected lengths - made-to-order roofing without waiting on slow manual quotes.

Complete Your Roof with Matching Accessories

• ✔ Roofing screws - 12 x 50mm Multifix, colour-matched
• ✔ Flashings
• ✔ Barge cappings and ridge cappings
• ✔ Quad guttering and fascia
• ✔ Downpipes
• ✔ Insulation and sarking

Frequently Asked Questions