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Trimdek Diagram Trimdek® ZINCALUME® Roofing Sheets - Victoria Trimdek Mass Table

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These ZINCALUME® Trimdek sheets are for use on roof pitch of 2° or greater and are an economical roofing,  cladding or wall sheet option. This profile is a long spanning cladding permitting wide support spacing & is a versatile, strong yet lightweight profile.


What is the sheet cover of the Trimdek Sheets? 
Cover width is 762mm. Actual sheet width is 820mm.

What is the steel thickness?
.48 BMT is the thickness of these Trimdek BlueScope Steel sheets - thicker than the standard .42 BMT sheets. 

How long does delivery take? 

Delivery takes approximately working 3 - 4 days. 


What fasteners do I use on the sheets?

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.


How much should I allow into the gutter?

It is usual to allow roof 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. 


Please note - this product is a .48 BMT thickness sheet. 

Also known as: Trimclad, Superdek and Monoclad Trimdek metal 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.

Cover width of sheet - 762mm (same cover as corrugated iron) The neatest way to cut the roofing sheets is with tin snips.

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.





Thinking of Roofing? Think Professional 



Are you thinking of undertaking any roofing project? Why not let professionals cater to you? We are Metal Roofing Online, a company that prides itself in excellent service delivery spanning 25 years. We offer you high-end roofing products that are ingenuously designed with Australian BlueScope Steel and all at fairly competitive rates. Our Services  One of our signature services is the provision of ZINCALUME® and the COLORBOND® Roofing sheets for all roofing needs in the entire Mornington Peninsula and the entire area of Australia. It may interest you to know that these brands come with a 36-year warranty so once you choose either as your preferred roofing material, you will not only have chosen a high-quality but equally durable brand. It may also interest you to know that we avail a wide range of products to accessorise your roofing or other home improvement projects. Some of these products are fascia, polycarbonate, custom flashings, gutter and a wide range of other home improvement products that you get to find under one roof. Why Us? Fast Turnaround. One of the reasons that give us an edge above other companies is our fast turnaround time. Whenever you order roofing materials from us, you can rest assured that these will be delivered within the least expense of time. Competitive Rates. While we are a business entity, we do not let the profit motive get in the way of our service delivery. It is for this reason that we offer fairly affordable rates to cater to clients of various income brackets. We are indeed sufficient proof that contrary to the popular perception, quality can oftentimes go hand in hand with cheaper prices. Trusted Brands. Roofing is a long-term investment and we understand that all too well. Therefore, we wouldn’t want to avail low-quality brands that will only serve as constant menace to your property. You can look to us to offer tried, tested and trusted Australian BlueScope Steel roofing products. We believe that when it comes to roofing, you need not settle for less. What’re You Waiting For?  With our long list of satisfied clients, why not let us service your roofing needs so you can become part of our long history of success? Give us a call today on 1300 886 944 and one of our able staff will be at your service.