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More Information: COLORBOND® Corrugated Roofing Sheets .42 BMT

COLORBOND® Corrugated Roofing Sheets .42 BMT are our most popular choice for standard residential roofing, sheds, garages, patios and carports.

Made from genuine COLORBOND® steel by BlueScope Steel, this classic corrugated profile gives you the traditional Australian roof look with strong everyday performance, reliable water run-off and fast installation when ordered in custom lengths.

If you are looking for genuine corrugated sheets that are cut to length, available in a wide colour range and delivered fast, this is the go-to option for many homes and small building projects across Australia.

Why choose .42 BMT corrugated sheets?

.42 BMT is the most common thickness for corrugated iron where standard spanning is suitable. It offers a practical balance of strength, weight and value, making it a strong choice for homes, sheds, garages, patios and many day-to-day steel roofing applications.

For customers comparing thickness options, .42 BMT is often the preferred starting point for standard roof builds, while .48 BMT may be considered where extra rigidity or higher project demands apply. If your build has engineering requirements, always follow the project specifications first.

• Most common choice for residential roofing

• Classic corrugated iron look in genuine COLORBOND® steel

• Lighter and easier to handle than heavier options

• .42 BMT sheets are easy to handle and install, making them suitable for both professionals and DIY projects

• Available in cut to length sheets

• Suitable for homes, sheds, garages, patios and carports, with alternative profiles like COLORBOND® Klip-Lok 700 roofing sheets in .48 BMT available for low-pitch or higher-demand roofs

• Standard Corrugated (.42 BMT) is the lighter and cost-effective option

Key specifications

Our COLORBOND® sheets are manufactured from genuine BlueScope Steel and supplied in the classic corrugated profile used across Australia for roofing and selected wall cladding applications.

• Thickness: .42 BMT

• Profile: Classic corrugated profile

• **Effective coverage:**762 mm coverage

• **Sheet lengths:**custom lengths / cut to length

• Finish: Genuine COLORBOND® steel

• Use: Roofing, selected roofing and walling, sheds, garages, patios and carports

Choosing the right sheet length helps reduce waste, improve handling and make installation more efficient. Ordering to exact lengths is especially useful on straightforward roof runs where you want a cleaner install and fewer joins.

Roof pitch, lengths and installation basics

The right sheet length and roof pitch depend on your building design, support spacing, rainfall conditions and fixing requirements. Like all steel roofing, corrugated sheets should be installed correctly and allow for thermal movement on longer runs.

Corrugated remains a strong choice where you want a traditional Australian roof look, practical coverage and reliable everyday performance.

For project-specific compliance, always follow the relevant span tables, fixing recommendations and manufacturer guidance. Correct fixings, safe handling and proper storage all help support long-term roof performance.

Colour range and roof colour choices

Genuine COLORBOND® steel is available in a broad colour range to suit both classic and modern Australian homes. Popular choices for roof colour selection include Woodland Grey®, Monument®, Surfmist® and other colours that work well with matching gutters, COLORBOND® fascia and downpipes.

Woodland Grey® remains one of the most popular options for customers wanting a versatile colour that works across suburban, coastal and rural settings. Lighter roof colours may also be worth considering for homes exposed to more sun.

Thermally efficient light colours in the COLORBOND® steel range can help keep your home cooler on hot days by reflecting more heat. These light colours can be especially useful in warmer parts of Australia where reducing heat build-up matters.

Performance in Australian conditions

Genuine COLORBOND® steel is manufactured for Australian conditions and is known for strong durability and long life performance when selected for the right environment and installed correctly. For coastal, marine or high-exposure locations, always check the suitability of the material before ordering.

BlueScope Steel products are tested for Australian weather exposure to support dependable day-to-day outdoor performance.

Common uses for COLORBOND® corrugated sheets

Corrugated sheets in .42 BMT are commonly used for:

• Residential homes and re-roofs

• Sheds and garages

• Patios, verandahs and carports

• Outbuildings and rural structures that may also use COLORBOND® flat sheets in wider 1200mm widths

• Selected roofing and walling applications that can be finished with COLORBOND® flat sheet 750mm flashing material

• Projects where the classic Australian corrugated look is preferred, often complemented by COLORBOND® flat sheet 900mm roof flashing

Corrugated remains a strong choice where you want a traditional look, practical coverage and reliable everyday performance.

Fast delivery and ordering online

We offer fast delivery across VIC, NSW, QLD, ACT and TAS. Every order is cut after purchase and supplied in the lengths you enter online, making it easier to order roof sheeting for your project without waiting around for custom quoting.

Because each order is cut to size, your selected lengths, colour, quantity and delivery location all affect the final order details. Length tolerance is +200 mm / –0 mm.

Compatible accessories for a complete roof

To complete your roof, pair your COLORBOND® corrugated roofing sheets with matching accessories and related products, including additional COLORBOND® roofing sheets where required for larger projects:

• Roofing screws in matching colours

• Gutters, fascia and downpipes

• Barge cappings and COLORBOND® flat sheet 600mm roof flashings

• Roof insulation, sarking and COLORBOND® MATT roofing and cladding options

Choosing compatible accessories at the same time can help avoid delays on site and create a more complete finish across your roofline.

Frequently asked questions

What is the effective coverage of corrugated sheets?

Our corrugated sheets have 762 mm coverage. This is the effective coverage used when calculating how many sheets you need across the roof.

What lengths can I order?

Sheets are supplied in custom lengths and cut to your order. Choosing exact lengths can help reduce waste and improve installation efficiency.

Is .42 BMT suitable for residential roofing?

Yes. .42 BMT is the most common choice for standard residential roofing, including homes, sheds, garages, patios and carports where standard spanning is suitable.

What colours are available?

Genuine COLORBOND® steel is available in a wide colour range. Popular options include Woodland Grey®, Monument® and other colours suited to both classic and modern homes.

Can lighter colours help keep a home cooler?

Yes. Thermally efficient light colours can help keep your home cooler by reflecting more heat, which can be useful in warmer Australian climates.

Can I match my roof with gutters and fascia?

Yes. Many customers coordinate their roof with matching gutters, fascia and downpipes for a cleaner overall finish.

Related products

.48 BMT COLORBOND® Corrugated Roofing Sheets | Roofing Iron | Roof Flashings | Roof Insulation