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Trimdek roof sheets (COLORBOND® .42 BMT)
Trimdek roof sheets are a go-to choice for many Australian homeowners and builders who want a modern look that’s also built to last. Recognised for its bold trapezoidal ribs and subtle fluting, the Trimdek profile delivers strength and clean architectural lines that suit contemporary homes, sheds, and many projects.
Trimdek is widely used across residential and commercial projects, including sheds, carports and selected sites where a stronger steel profile is preferred. For buyers comparing profiles, Trimdek in heavier .48 BMT COLORBOND® roof sheets is a popular option because the Trimdek shape supports clean lines on modern roof lines. .
One of the reasons Trimdek remains so popular is its excellent spanning capacity. Trimdek’s excellent spanning capacity is one reason Trimdek is often selected for longer runs. When your design allows it, Trimdek can help achieve wide support spacings on jobs while keeping the Trimdek profile looking consistent.
The Trimdek look comes from bold ribs and subtle fluting through the pans, which helps Trimdek maintain neat lines across long runs.
Colorbond steel (COLORBOND®): performance & long term durability
These Trimdek sheets are made from genuine colorbond steel. Colorbond steel is widely used in Australian roofing because colorbond steel is pre-finished and designed for long term performance when selected and installed correctly. For customers choosing Trimdek for roofing, colorbond steel provides a durable finish and helps keep Trimdek roofing looking consistent over time.
Like all steel roofing, performance depends on choosing the right product for the environment and maintaining good drainage and airflow, and for coastal or demanding environments many builders also compare ZINCALUME® roofing sheets in various profiles. . COLORBOND® steel roofing sheets are designed for Australian conditions, and Trimdek is designed for Australian conditions and offers corrosion resistance when installed correctly and maintained over time, with options such as COLORBOND® MATT Trimdek roofing and walling sheets providing additional aesthetic choices. . .
Steel roofing can expand and contract slightly with heat and temperature changes. Trimdek’s profile shape is designed to stay stable and is often described as having remarkable recovery after handling. Correct fixing helps minimise visible deformation on longer lengths and exposed spans, keeping the roof looking crisp and consistent.
Custom cut to your required length
Each sheet is custom cut to your required length, which helps minimise joins, creates a cleaner look, and keeps your roof lines straight from eave to ridge, and the same made-to-measure approach applies to ZINCALUME® Trimdek roof and wall sheets. .
If you need multiple lengths, add each Trimdek line separately so your Trimdek order arrives clear and easy to install. For accuracy, confirm measurements in mm before checkout and ensure each Trimdek piece matches your roof layout. Measuring in mm is the simplest way to avoid delays or rework on site.
Woodland Grey and popular COLORBOND® colours (including Classic Cream and Monument)
Trimdek COLORBOND® roof sheets come in a wide selection of colours to suit modern and traditional Australian builds. Woodland Grey is a timeless neutral that pairs well with many gutter and fascia styles.
Other in-demand colours include Classic Cream, Monument, Night Sky, Deep Ocean and Pale Eucalypt (availability can vary). Popular Trimdek colour picks include Classic Cream, Monument and Monument in colorbond steel finishes, depending on the look you want across the Trimdek profile and roofline accessories.
When choosing your colour, think about what will be most visible from the street and how it complements other exterior details like ridge capping and guttering for a consistent finish.
Common applications: sheds, wall cladding, commercial buildings & low roof pitches
Common Trimdek applications include sheds, garages and sheds with long runs, plus selected wall cladding designs where wall cladding and a steel roof use the same profile, and ZINCALUME® Trimdek roofing sheets in .48 BMT are often chosen for additional strength in these applications. . Trimdek can also suit low roof pitches on some builds, and low roof pitches are a common reason customers choose Trimdek roofing for modern designs (confirm suitability for your roof detail). For very low-pitch designs, some projects instead use COLORBOND® Klip-Lok 700 roofing sheets. In certain projects, wall cladding can be paired with Trimdek profile for a consistent external finish. .
Trimdek is frequently used across residential and commercial work, including buildings where a clean look and reliable performance are important. For best results, match your roof design, laps, sealing and accessories to the application and environment, and follow correct COLORBOND® Trimdek roofing installation methods. .
Compatibility and finishing details
For a neat, watertight finish, pair your Trimdek sheets with compatible accessories, including Trimdek infill strip bottom profile foam seals to close gaps under the sheets. . That includes COLORBOND® ridge capping for Trimdek roofing at the peak, gutter selection and fascia detailing, plus correct flashings at penetrations and junctions. . Using coordinated components improves water-shedding performance and gives your roofline a consistent, professional look.
Delivery
Delivery is available across Australia; use the postcode checker for Trimdek delivery options and timing for your Trimdek order. Before checkout, double-check your required lengths, colours and quantities so everything arrives ready for install.
