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More Information: Trimdek COLORBOND® Roofing Sheets – .42 BMT
LYSAGHT TRIMDEK COLORBOND® roofing sheets are a high-strength, low-maintenance solution for modern Australian builds. Featuring a high-strength steel construction and a distinctive trapezoidal rib design, these sheets are also highly durable, offering long-lasting performance and resilience in harsh Australian conditions. Designed for roof pitches of 2° or more, they’re ideal for residential homes, sheds, garages, carports, and large-scale commercial projects. The structural integrity and reliable performance of LYSAGHT TRIMDEK contribute to safety in all building applications.
These COLORBOND® steel sheets are custom cut to your selected length and manufactured in .42 BMT – the most popular profile among our customers across VIC, NSW, and QLD (and also available in COLORBOND® Klip-Lok 700 Roofing Sheets – .48 BMT High Strength for greater durability and strength). Each sheet’s wide 762mm cover and high-rib design provide excellent spanning capacity and subtle fluting for added rigidity. The pan between the ribs is engineered for effective water runoff and enhanced structural integrity. The design allows installation with minimal or no end laps, giving a seamless appearance from ridge to gutter and reducing potential leak points. The underside can feature gloss finishes that reflect natural light, enhancing the look of covered outdoor spaces such as patios and carports.
Introduction to Trimdek Roofing
Trimdek roofing is a smarter choice for projects seeking a versatile roof and wall cladding solution that delivers both performance and style. Recognized for its bold trapezoidal ribs and subtle fluting in the pans, Trimdek stands out for its ability to achieve wide support spacings and excellent spanning capacity, making it suitable for a wide range of residential, commercial, and industrial buildings. Whether you’re building a new home on the Gold Coast, upgrading a commercial structure in Victoria, or adding a patio to your Queensland property, Trimdek’s lightweight yet high strength steel construction ensures long lasting performance and remarkable recovery from deformation. With multiple variants and a broad range of COLORBOND® colours—including popular shades like Woodland Grey®, Deep Ocean®, and Classic Cream®—Trimdek complements any architectural style while maintaining its structural integrity and aesthetic appeal.
Colorbond Steel Properties
COLORBOND® steel is engineered for durability, versatility, and superior performance in Australia’s diverse climates. Manufactured by BlueScope Steel, this material is renowned for its high strength, resistance to corrosion, and ability to maintain its appearance over time. The advanced paint technology used in genuine COLORBOND® ensures that colours like Shale Grey®, Cottage Green®, Night Sky®, and Manor Red® remain vibrant, even under harsh sun or heavy rain. The steel’s thermal performance helps reduce heat absorption, keeping buildings cooler and more energy efficient. Its lightweight nature makes installation easier and safer, while the robust finish resists chipping, peeling, and cracking. COLORBOND® steel is also compatible with a wide range of roofing and walling accessories, making it a reliable choice for both new builds and renovations.
Key Benefits: Excellent Spanning Capacity
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✔️ Manufactured in Australia using genuine COLORBOND® steel
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✔️ Engineered for thermal performance and aesthetic appeal
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✔️ Compatible with COLORBOND® gutters, flashings, and downpipes
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✔️ Delivered Australia wide – from rural properties to metro construction sites
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✔️ Available in all popular COLORBOND® colours: Woodland Grey®, Shale Grey®, Deep Ocean®, Pale Eucalypt®, Classic Cream®, Cottage Green®, Night Sky® and more
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✔️ Excellent choice for low-pitch roofs (minimum 2° fall)
Product Specifications: COLORBOND® steel
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Profile: Trimdek®
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Base Metal Thickness (BMT): 0.42mm
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Cover Width: 762mm
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Minimum Roof Pitch: 2°
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Available Lengths: Custom cut to order
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Finish: COLORBOND® steel
For compatible gutters, see our Trimline Gutter range.
Environmental Impact
Choosing Trimdek COLORBOND® roofing sheets is not only a practical decision for your project, but also an environmentally responsible one. COLORBOND® steel is 100% recyclable and manufactured with a focus on reducing environmental impact throughout its lifecycle. The material’s excellent thermal performance helps lower energy consumption by reducing heat absorption, which can contribute to cooler interiors and less reliance on air conditioning. This is especially beneficial for projects in hot climates or those aiming for sustainable building certifications. Additionally, the long lasting performance and durability of COLORBOND® steel mean fewer replacements and less waste over time. By selecting Trimdek in colours like Pale Eucalypt®, Evening Haze®, or Monument®, you’re investing in a roofing and walling solution that supports both your project’s needs and the environment.
Applications: Wall Cladding
Perfect for homes, carports, patios, garages, and large commercial buildings requiring efficient water run-off, weather resistance, and long-term durability. Trimdek’s wide support spacing and subtle fluting deliver a bold modern aesthetic and structural integrity.
Why Choose COLORBOND® Trimdek?
Backed by BlueScope and tested under the harshest Australian conditions, Trimdek roofing sheets are built for longevity. Whether you're in a coastal environment, regional area, or high rainfall zone—this product performs. The .42 BMT profile provides robust support and is preferred by roofers and builders nationwide for its ease of installation and lightweight handling.
FAQs and Support
Q: Is Trimdek suitable for both roofing and wall cladding?A: Yes, Trimdek is designed as a versatile solution for both roofing and walling applications, offering excellent spanning capacity and wide support spacings for a variety of structures.
Q: What COLORBOND® colours are available?A: Trimdek is available in the full range of genuine COLORBOND® colours, including popular options like Woodland Grey®, Deep Ocean®, Shale Grey®, Classic Cream®, Pale Eucalypt®, Jasper®, and more, allowing you to match or complement any design.
Q: Can Trimdek be used for low-pitch roofs?A: Absolutely. Trimdek is engineered for a minimum roof pitch of 2°, making it ideal for modern, low-slope designs.
Q: How does Trimdek perform in harsh weather conditions?A: Manufactured from high strength COLORBOND® steel by BlueScope, Trimdek offers remarkable recovery from deformation, excellent weather resistance, and long-term durability, even in coastal or high rainfall locations.
Ready to Order?
Simply select your custom length, choose your COLORBOND® colour, and add to cart. All sheets are made to order and delivered directly to your site.
Frequently Asked Questions – Trimdek COLORBOND® Roofing
What is Trimdek roofing?
Trimdek is a high-strength metal roofing profile made from steel, known for its wide 762mm coverage, ribbed design, and suitability for low-pitch roofs. When made from COLORBOND® steel, it combines durability, colour variety, and weather resistance – ideal for both residential and commercial use.
What does .42 BMT mean?
BMT stands for Base Metal Thickness. .42 BMT indicates the sheet is 0.42mm thick (excluding paint and coatings), making it a popular choice for residential roofing and cladding due to its balance of strength and lightweight handling.
What roof pitch is Trimdek COLORBOND® suitable for?
Trimdek COLORBOND® roofing sheets are designed for roof pitches as low as 2°, making them ideal for flat or low-slope roofing projects such as carports, patios, garages, and large-scale sheds.
Can I order custom lengths?
Yes – all Trimdek roofing sheets can be cut to your exact length requirements. Simply select your preferred length in metres when ordering, or choose "Custom Length" for precision cutting to suit your build.
Is COLORBOND® steel made in Australia?
Absolutely. All our COLORBOND® Trimdek roofing sheets are made from genuine BlueScope COLORBOND® steel – proudly manufactured in Australia and performance-tested for local conditions.
What colours are available?
We stock the full range of COLORBOND® colours including Woodland Grey®, Monument®, Shale Grey®, Deep Ocean®, Pale Eucalypt®, Classic Cream®, Cottage Green®, Night Sky®, and more. View the colour swatches on this page before ordering.
How is my Trimdek roofing delivered?
We deliver COLORBOND® Trimdek roofing accross VIC, NSW, QLD, ACT & TAS. Orders are securely packed and sent directly to your site, warehouse, or home using trusted freight partners. Delivery timeframes vary depending on location and sheet length.
What’s the difference between Trimdek and corrugated roofing?
Trimdek has a bold, high-ribbed profile with wider coverage (762mm) and greater spanning capacity. Corrugated roofing has a traditional wave profile. Trimdek is often preferred for commercial builds and low-pitch roofs, while corrugated suits classic and heritage homes.
Does COLORBOND® steel come with a warranty?
Yes – all genuine COLORBOND® steel products are backed by BlueScope warranties when installed correctly. These warranties cover corrosion, flaking, and performance under Australian conditions.
