0.48 BMT TRIMDEK® COLORBOND® Roofing Sheets

If you're searching for 0.48 BMT TRIMDEK® roofing sheets, you're in the right place. This page focuses exclusively on the features, benefits and applications of 0.48 BMT TRIMDEK® COLORBOND® roofing sheets - a resource for builders, homeowners and architects who need a robust, long-lasting roofing solution.

Why does this product matter? The 0.48 BMT (Base Metal Thickness) TRIMDEK® sheet is engineered for strength, durability and superior performance in demanding environments. Its increased thickness makes it ideal for longer spans, higher wind zones and projects where structural integrity is paramount. Manufactured from genuine COLORBOND® steel, these sheets also offer outstanding corrosion resistance.

What Does BMT Mean and Why Is 0.48 BMT Significant?

BMT stands for Base Metal Thickness - the actual thickness of the steel before any coatings are applied. The 0.48 BMT thickness of TRIMDEK® sheets provides increased strength, making it suitable for longer spans and higher wind zones - essential for durability in demanding applications. This extra thickness improves load performance and resistance to movement in exposed or high-wind areas, making 0.48 BMT a preferred choice for commercial and industrial roofing.

Why Choose 0.48 BMT TRIMDEK®?

The main reason buyers step up to 0.48 BMT is strength. The thicker sheet is better suited to longer spans, exposed conditions and projects where greater rigidity matters. Per the supplier guide, the .48 BMT TRIMDEK® delivers larger maximum support spacings than the .42 BMT version across single, end and internal roof spans.

Typical Maximum Support Spacings for 0.48 BMT TRIMDEK® Roofing:

Common applications for 0.48 BMT TRIMDEK® roofing sheets:

• ✔ Commercial projects needing longer spans and wider support spacings
• ✔ Commercial buildings and industrial sheds
• ✔ Residential roofing where extra strength is preferred
• ✔ Carports, patios and outbuildings in exposed areas
• ✔ Projects where a stronger COLORBOND® sheet improves long-term performance

Beyond strength, TRIMDEK® also offers design flexibility for modern rooflines.

Profile, Cover Width and Custom Lengths

TRIMDEK® features a distinctive 5-rib profile with a 762mm cover width and a rib height of approximately 29mm. This structured appearance is popular among builders and homeowners. COLORBOND® Matt TRIMDEK® roofing and walling sheets offer an alternative finish for projects focused on architectural aesthetics.

TRIMDEK® is available in long lengths, allowing many jobs to use a single sheet from ridge to gutter without end laps. Sheets are supplied custom cut, which helps reduce waste and makes it easier to order the exact length for your project.

Designed for Low Roof Pitches

One of TRIMDEK®'s biggest advantages is its suitability for low roof pitches. Per the supplier guide, TRIMDEK® cladding can be used on roof pitches as low as 2° (1 in 30) thanks to its long sheet lengths and anti-capillary groove. This makes it a practical choice for modern roof designs where low-slope roofing is part of the aesthetic or engineering brief.

Made from Genuine COLORBOND® Steel

These .48 BMT TRIMDEK® sheets are manufactured from genuine COLORBOND® steel, delivering the proven durability, corrosion resistance and finish consistency expected from BlueScope products. See other COLORBOND® roofing sheets for Australian conditions. COLORBOND® steel complies with AS/NZS 2728 and uses an aluminium/zinc alloy-coated steel base complying with AS 1397. Core COLORBOND® colours in Classic and Matt finishes include Thermatech® solar reflectance technology.

Installation and Roof System Compatibility

Fixing methods: TRIMDEK® is a pierce-fixed roofing profile and can be fixed to timber or steel supports. Following recommended COLORBOND® TRIMDEK® installation methods helps ensure long-term performance. For roofs, screws should be placed through the crests to maximise watertightness, and sheets typically overlap into gutters by around 50mm. On very low slopes, additional detailing may be required to control capillary action.

System integration: This profile is designed to integrate neatly with compatible TRIMDEK® ridge capping and flashings, gutters, downpipes and fasteners, and with complementary COLORBOND® flat sheet roof flashing.

Accessory compatibility: If you're ordering roofing sheets online, it makes sense to add matching ridge capping, barge capping, screws, insulation and rainwater goods at the same time. Consider whether you also need COLORBOND® flat sheets in wide 1200mm sizes for custom flashings or infill panels.

Why Buy .48 BMT Instead of .42 BMT?

For straightforward standard residential jobs, .42 BMT may be enough. Some industrial or coastal projects may benefit from ZINCALUME® TRIMDEK® roofing sheets in .48 BMT for extra corrosion protection.

If you need more strength, better spanning ability, or a stronger sheet for demanding conditions, .48 BMT TRIMDEK® is the better choice - alongside other low-pitch options like COLORBOND® KLIP-LOK® 700. Same recognisable TRIMDEK® profile and COLORBOND® finish, with extra thickness and a more heavy-duty feel on the roof.

Order TRIMDEK® .48 BMT Cut to Your Required Length

At Metal Roofing Online, order .48 BMT TRIMDEK® COLORBOND® roofing sheets online in your selected colour and required length. Easy to price your roof, reduce waste and get the stronger sheet when your project calls for it. Comparing alternative profiles? See COLORBOND® standing seam cladding.

If you're comparing TRIMDEK® options, this page is the right choice when you want the 0.48 BMT version - not the lighter .42 BMT alternative.

Frequently Asked Questions