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COLORBOND® TRIMDEK® Roofing Sheets .42 - Victoria Trimdek Diagram Trimdek Weight COLORBOND® Trimdek Span Table Trimdek Span Diagram Trimdek Fasteners Application Underside of colorbond

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Purchase TRIMDEK COLORBOND® Roof Sheets - for use on roof pitch of 2° or greater. Order online, contact our customer care team on 1300 886 944 or email. 


This COLORBOND® steel lysaght metal roofing profile is a long spanning cladding permitting wide support spacing & is a versatile, strong yet lightweight profile.

What is the sheet cover?
Cover width is 762mm. The actual sheet width is 820mm.

What is the steel thickness?
.42 BMT is the standard thickness of our BlueScope Lysaght Steel sheets. A thicker .48 BMT COLORBOND Trimdek sheet is also available. 

Sheet Tolarance: Length: + 0mm, – 15mm; Width: + 4mm, – 4mm Make allowance for thermal expansion or contraction for long length roofs at sheeting ends

Which fasteners do I use for installing the roofing sheets?
Here at Metal Roofing Online, we only use and recommend 12 x 65 timber fix fasteners when installing your roof sheeting as they last considerably longer in the elements. These are able to colour matched to your sheets. 


How long does delivery take?

Delivery takes approximately working 4 - 5 days once the order has been placed, depending on location. 

How much should I allow into the gutter?

It is usual to allow metal roofing sheets to overlap into gutters by about 50mm. If the roof pitch is less than 25° or extreme weather is expected, the pans of sheets should be turned-down at lower ends, and turned-up at upper ends by about 80°. Turn your Trimdek Sheets up or down using this Trimdek Tool



We use only the best 100% Australian steel for 100% peace of mind; made from BlueScope’s industry-leading brands such as COLORBOND® and ZINCALUME® steel. And, of course, all our products are extensively performance tested, backed with the strength of the BlueScope warranty and can be relied on with total and absolute confidence. 


Also known as: Trimclad, Superdek and Monoclad COLORBOND® steel Trimdek Lysaght roofing sheets are used on roofs with a minimum of 2 degree of fall or greater.  It is screw down metal deck roofing iron, which makes it very easy to install. These roofing sheets are a cost effective alternative to Klip-Lok roofing sheets. It sits well in both domestic and commercial applications.

Your home is likely to be your biggest financial investment and your largest asset. Having a BlueScope warranty covering the important steel building products in and around your home is an investment in peace of mind. COLORBOND® steel is developed for, and therefore more resilient to, the severe sunlight and temperatures typical of Australian environments. BlueScope scientists have tested COLORBOND® steel in some of Australia’s harshest climates. 

Rest assured that COLORBOND® steel is guaranteed to meet relevant Australian standards. Make sure you look for the brand as not all painted steel is genuine COLORBOND® steel.


Recommended Fastening Method

When fixing into timber battens, we recommend a 12 gauge x 65mm Type 17 Hex Head screw. If fixing into steel purlins, please use a 12 gauge x 55mm Steel Fix Hex Head screw. When using the sheets as wall cladding, a 12 gauge x 25mm Type 17 Hex Head should be used for timber battens and for steel purlins, a 10 gauge x 16mm Steel Fix Hex Head screw is best.


Trimdek, in particular, pertains to square-fluted steel cladding that is available in long lengths. This means that one sheet can be used from ridge to gutter without having any end laps. Trimdek is remarkably strong (it can easily recover from deformation), it has excellent spanning capacity, it is lightweight, and it is properly rigid. And of course, it is available in a wide variety of colours that Colorbond roofing steel is well known for — earthy colours that reflect Australia's distinct landscapes. Keep in mind that your house needs as much care and attention as its other features do. By choosing the best materials, like Trimdek roofing, your home can truly show your neighbourhood what a stunning mix of beauty and function truly looks like.


Metal Roofing Online: with steel supplied by Australian BlueScope Steel

Looking for the lowest price and the fastest delivery? Metal Roofing Online, with steel from Australian BlueScope Steel can supply all your metal roofing needs. A correctly installed metal roof will last as long as the house itself. Metal roofing survives high winds, seals out water and sheds snow. It is resistant to insects, mildew and fire. There are so many advantages of metal roofing. not only does metal roofing increase energy efficiently, it reduces the maintenance and operating costs. There is a positive impact on the performance of constructing by providing sustainability, durability and longevity. Th benefits of metal roofing far outweigh traditional types of roofing. 

Great Performance: Metal roofing is fire resistant and has a proven expectation of performance of over fifty years. Metal roofing for residences is a fast-growing segment of home improvement for a good reason. In the past years, more and more people have opted to install metal roofing more than any other type. You get true value of money with the interlocked panels that resist winds. There are great styles and colours to match your neighbourhood or your home. The broad variety of colours can match any theme you have in mind. Order roofing online or through our team of customer care. 

Heat Resistant: Unlike other types of roofing, metal roofing by is able to resist the sun's heat. This lessens heat during the midday and keeps residents cool no matter how high the temperatures get. You can save energy necessary for daily air conditioning. The low insulation metal roofing can even be applied over foam rigid insulation with the highest R values. Plus, dead air space between the roof deck and the metal increase the energy efficiency in every home or commercial space. 

Fast Delivery: The moment you place your order with Metal Roofing Online, steel supplied by Australia BlueScope Steel, you can be sure your metal roofing and roofing supplies will arrive in a timely manner. We offer the lowest prices and the most rapid delivery methods. We know the value of a good referral and strive to exceed your every expectation. As a matter of fact, give us a call today or get in touch with our team and we can discuss your project. We can supply all your roofing and roofing supply needs and aim to deliver before the deadline. 




Having high-quality roofing is one of the best ways to ensure the quality of your home. Getting such roofing material is only possible if you use a reputable and reliable supplier. The colorbond roofing is  strong and durable and can be used on a wide range of properties. Their stylish nature makes them appealing to the eyes which means that whatever property you use them on, you'll achieve the modern look without struggling. Metal roofing online is the best company to get your trimdek from. They have the highest quality products with the excellent customer service.

The company also prioritises customer satisfaction. This is why they have the lowest prices and fast delivery. The affordability of their products doesn't affect its quality. They ensure to give their customers the best roofing products that will last a long time and as such, ensure that their clients get value for money. They are efficient with the delivery. Although the delivery process differs from every location, you can be sure that your roofing will get to you usually within 4 business days.

Another reason why ordering your roofing from this company is a good idea is their easy and secure online ordering. Security is usually one of the common concerns with online purchases but this company ensures that your details remain safe. They also ensure that you get the exact product that you ordered when you want it. Ordering Trimdek from this company is a good investment. You end up with a roof that can withstand the harshest weather without degrading or breaking down. Your roof will remain strong throughout the seasons ensuring that you don't spend more on repairs or replacements.

Being a reputable company is an added advantage that you should take advantage of. They have been in business for a long time and have gained a good reputation to become suppliers of Trusted Australian BlueScope Steel roofing. They not only supply you with the roofing materials, but they can also do the installation for you. The high level of professionalism allows them to give you the best services that are bound to make your roof the centre of attraction. If you decide to do the installation yourself, they will give you professional advice that will make the process simpler for you.

Conclusion: Apart from the high-quality colorbond roofing, the company also has high-quality roofing accessories. Everything ranging from the screws to the closure strips is made with utmost precision and will ensure that you get the most professional finishing.