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COLORBOND® TRIMDEK® Roofing Sheets .42 - Victoria Trimdek Diagram Trimdek Weight Trimdek Fasteners Application

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Purchase TRIMDEK COLORBOND® Roof Sheets - for use on a 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?
The 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 Tolerance: 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 match your sheets. 



How long does delivery take?

Delivery takes approximately 4 - 7 working 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.


Nowadays, colorbond roofs have revolutionized the world of the roofing industry. A few years ago, metal roofs were a budget-friendly option and were commonly used in commercial buildings and warehouses. However, everything changed following the introduction of these colorbond roofs Trimdek from https://www.metalroofingonline.com.au. The great news is that colorbond roofs are available in several colours. Let's understand how to install these colorbond roofs.

Choosing the Colorbond Roof

After the product was launched, it continued to improve. It soon included a lot of varieties. At present, you can find that this roofing material can satisfy all your needs:

Remember: colorbond is a complete roof system. Therefore, when you opt for a roof system, we suggest you choose the proper gutters. In other words, you may want to choose a suitable colour.

The installation

Installing colorbond roofs is not an impossible task, but you may not want to do it yourself if you do not have the ability. Make sure the roof is installed to an acceptable standard. This ensures that the roof is installed correctly and that it will not pose a risk or danger in extreme weather conditions. Therefore, if you have not done this type of work before, we suggest looking for a professional.

The installation process

1. First, you require to install the fascia and gutters.

2. Before this roof, you should install sarking, which is a reflective foil.

3. A different alternative to sarking is the insulated blanket.

4. In fact, colorbond sheets are light. So you can take them to the roof without anyone's help, but they're a bit cumbersome. Therefore, it is a good idea to get a helping hand.

5. When placing the sheets, be sure to mark them with a chalk line. The sheets must also be cut accordingly.

6. The gutters must also be aligned with the sheets.

7. Once the installation is complete, we recommend that you clean it thoroughly. Small fragments of metal can corrode the roof. So make sure you remove them regularly.

Finally, you may want to keep in mind that you will be doing the job at a dangerous height. So you may want to be more careful. It is a good idea to get quotes from various professionals alternatively of doing the job yourself.


Buildings in Australia experience extremely challenging weather conditions throughout the whole year. COLORBOND® Roofing conducts various laboratory tests for the durability of corrosion-free exteriors of the buildings, A group of 12,000 panels, as a part of the assessment program, are exposed across various moderate to severe environmental conditions in Australia. This assessment regime carried out by Bluescope exceeds the Australian testing standards for steel building products. The program ensures how the product will perform in real homes.

Purchase your COLORBOND® roofing from Metal Roofing Online: having more than 25 years of hands-on roofing experience, is Australia's leading supplier of COLORBOND® Roofing products and accessories. At highly competitive prices, we supply high-quality building materials with a wide range of COLORBOND colours.

Metal Roofing use products only from the best available brands in the market. The steel used for roofing is trusted Australian BlueScope Steel. BlueScope, one of the largest Australian manufacturers, is covered by warranty online using Warranty Management System on the BlueScope website. BlueScope also offers a pre-approved warranty for builders if they fulfil the eligibility criteria. Metal Roofing provides easy, secure online ordering with our safe online payment system.

We offer fast delivery at the specified locations. Just call us, and let us know where you want your goods to be delivered. We will get them there as soon as possible. We also provide pick up facility. Metal Roofing provides the lowest prices and focuses mainly on quality and customer satisfaction. In support, we are also available on call and email to answer any queries related to your projects.