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Trimdek® ZINCALUME® Roofing Sheets - Victoria Trimdek Diagram ZINCALUME® Trimdek Span Table Trimdek Span Diagram Trimdek Weight

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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?
.42 BMT is the standard thickness of our BlueScope Steel 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. 



Also known as: Trimclad, Superdek, Apclad 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.

Steel thickness - .42 BMT

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

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.


ZINCALUME® steel is developed for, and therefore more resilient to, the severe sunlight and temperatures typical of Australian environments. BlueScope scientists have tested ZINCALUME® steel in some of Australia’s harshest climates. 

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



7 Reasons Why ZINCALUME® Trimdek Roofing Is a Top-Rated Product

Roofing is a vital component of building structures; therefore, it’s imperative to choose the best roofing products to ensure that it will effectively deliver both beauty and function to the structure, be it a home or a commercial building. And speaking of the best product for roofing, Trimdek easily makes the list, according to professional roofers and building contractors in Australia. Why? When it comes to durability, Trimdek always rates high because it’s been developed to withstand all the abuses roofs are commonly subjected to, and its many options are suited to the climate and conditions of specific areas. Therefore, homeowners can have the assurance that it will not just protect their home from the elements, but it will also last them an impressively long time. Trimdek comes in a vast variety of colour options. This means finding the right hue to fit customers’ preferences will be easy. So, whether they want their home or building to blend harmoniously into the landscape or they want it to pop, that will be a breeze to accomplish, given the wide selection of colours Trimdek roofing sheets come in for people to choose from. It’s quick to install because it’s lightweight, comes in long lengths, and the square-fluted design profile comes in both convex and concave pre-curved sheets. Roofers don’t have to work extra hard to arrange, fix and bend Trimdek roofing sheets according to the shape of the structure. It has overlapping side ribs, which are an advantage in preventing leaks that can spawn exponential damages to the building structure and other components. Trimdek roofing is easy to repair as well; deformities due to heavy debris falling on it can be corrected right away in order to restore its nice original appearance. It’s a highly versatile product. Although intended for roofing, it can also be used for walling and as a substitute or reinforcement for certain structural elements. It’s economical. Not only can it be purchased at an affordable price (especially if folks shop online from trusted suppliers that are generous with discounts and cost-saving deals), but also, it’s cost-effective because of its functional lifespan, resistance to many damaging components, and the ease of installation. By opting for this product, people actually can save a significant amount of money. Beauty, economy, and functional versatility — these are the benefits delivered by Trimdek. It’s no wonder it is highly recommended by (and is a much-preferred product of) roofers and contractors. Trimdek is available through us here at Metal Roofing Online.


Purchase your ZINCALUME® Steel with Metal Roofing Online 


ZINCALUME® Steel is a sustainable, next generation sheet steel, developed for durability and resilience. With its patented metallic coating, the product is two to four times more resistant to corrosion than galvanised steel. Manufactured by the trusted Australian company, BlueScope Steel, they’re so confident that ZINCALUME® is a product you can trust, every purchase is covered by warranty. Why is ZINCALUME® the best choice? Easily bent, roll-formed or drawn, ZINCALUME® is the building material of choice for construction projects all around the world. ZINCALUME® is perfect for complex architectural applications. Its flexibility makes it the product choice for both traditional straight roof sheeting and innovative curved roofing designs. Durable and resilient Highly scratch-proof thanks to ZINCALUME® steel’s patented Activate® aluminium-zinc alloy coating, ZINCALUME® has a long lifespan and will provide years and years of protection for your building. The development of ZINCALUME® Tested over a 17 year period, under a variety of “real world” climatic conditions including extreme marine environments, you can be assured that ZINCALUME® AM125 is the material that’s going to withstand the constant attack of the elements for many years to come. BlueScope Steel are so convinced that ZINCALUME® AM125 is the most durable steel product on the market, they back the product with a warranty of up to 36 years! Thermally efficient ZINCALUME® is one of the world’s most thermally efficient roofing materials and because it’s so tough and durable, it acts as a major deterrent against intruders. Weather tight and secure, ZINCALUME® is a material you can trust. Purchase with us today! Purchase your ZINCALUME roofing from Metal Roofing Online. Our 30 years of experience in the roofing trade make us the ideal choice for the supply and installation of your ZINCALUME® products. Easy, secure online ordering. Fast delivery at the lowest prices!




Beautifying And Protecting Buildings With High Quality Roofing Supplies

Roofs protect homes and other structures from the wind, rain and other elements. They’re an essential part of everyday life. Roofs allow buildings to withstand the impact of changing seasons, and at the same time, blend beautifully into an area’s natural landscape. They are not just functional; they also display people’s aesthetic sensibilities. In recent years, roofing materials have been developed further to meet new requirements created by global warming and people’s fast-changing comfort and style preferences. It can be quite a delight shopping for roofing supplies because of the vast selection. For example, Australian BlueScope Steel products offer an impressive design range of roofing sheets. The many design options of roofing sheets allow buyers to choose what would work compatibly with the architectural design of a building. Aside from that, buyers can also make sure that the buildings achieve the ideal interior environment; that’s because there are roofing sheets and other materials that have been created to block solar radiation very effectively. Manufacturers carefully studied how these roofing materials can have effective insulating properties. Along with that, they made sure that they have a product line-up that also includes items that are completely fire-resistant since bush fires are a big problem in the Australia. They want roofs to contribute in a big way to the goal of making buildings a completely safe shelter from nature’s extremes. Not all roofing materials are created the same, however. There are definitely brands that outperform others by delivering even more benefits to home and building owners in terms of function. Therefore, if you’re installing a new roof, it’s crucial to be a smart buyer. If you want the best protection for your building, you must study all your options and compare them against each other. Don’t make price the main consideration; instead, look into the capabilities of the products and how they meet your requirements. When you start off this way, finding roofing supplies that go with your budget will become a breeze. And when it comes to high-quality roofing supplies, you cannot overlook Australian BlueScope Steel products. Not only are these some of the best (if not the best) on the market in terms of quality, but they are very affordable, too. If you’re looking for a great deal on Australian BlueScope Steel roofing supplies, you’ll find trusted vendors that offer them at the lowest prices and deliver orders really quickly.

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