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Trimdek Mass Table COLORBOND® TRIMDEK® Roofing Sheets .42 - Victoria Trimdek Span Table Trimdek Weight .48 bmt COLORBOND® Roofing Trimdek Sheets fixing diagram .48 bmt COLORBOND® Roofing Trimdek Sheets

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For use on a roof pitch of 2° or greater.

This roofing profile is a long-spanning cladding permitting wide support spacing & is a versatile, strong yet lightweight profile.

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

We recommend using the 12 x 65 timber fix fasteners for these sheets. 

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

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

How long does delivery take? 

Delivery takes approximately working 4 - 7 days depending on location. 

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.


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.



Installing Trimdek for Walling Using the Pierce-Fixing Method


If you are planning to install Trimdek as a wall cladding, it is highly recommended that you use the pierce-fixing method over the concealed-fixing method.  With this method, you can affix the screws either through the crests or the pans or valleys. For wall cladding purposes, it is highly recommended that you affix the screws through the valleys for three key reasons. First, the screws are less obvious and the aesthetic lines won't be broken. Second, because the fastener goes through the cladding through the valley, the chances of the cladding getting deformed is practically eliminated. Finally, affixing the screws through the valley ensures a tight water seal. If you are going to affix the screw through the valleys, you will need a side lap fastener for all the laps and support. If you wish to minimise the time, money and effort required for this task, you may use a crest fastener. Prior to the installation of the wall cladding, make sure that the support structure is in the same plane. Before laying the sheets, check the supports and make the necessary adjustments. Remember, it will be doubly difficult to make adjustments once the sheets have been installed. Begin installing the sheets in the area which you expect the prevailing weather to come from. Before lifting the sheets, it is best if you turn these first on the ground. It is much safer that way. Before affixing each sheet, position it against the building and check whether it is aligned with the end wall as well as the parapet or transverse wall. After finishing the installation of the first sheet, make sure that the next sheet is aligned properly against the previously installed sheet and from the end of the sheet to either the fascia or purlin. You can either install each sheet quickly before moving to the next or you can simply fix one sheet after another and then use the intermediate fasteners when all the sheets have been laid into place. From time to time, double check each sheet to see whether each one is aligned with the first sheet that you installed. Once you are halfway done with the installation, check the sheets and their measurements from the end line so that the final sheet is parallel with the end of the roof. If you think you are off by a little, you can adjust by aligning and fixing the lap and then fixing the outer edge of the sheet by affixing the fastener either closer or further than your original plan. You can purchase and the other materials you will need for roofing and wall cladding here at Metal Roofing Online, your trusted Bluescope Steel supplier.



What Features To Look For In a COLORBOND steel Lysaght Roofing Company

Most people have come across the term colorbond roofing but because they are not technology persons or homeowners they always get confused. The roofing materials involved in the construction process are classified as Colorbond Roofing. Colorbond Roofing supplies company based in Australia is the most effective company one can hire to supply the building materials from one destination to the other. There is no doubt that most of the construction industries are experiencing all sorts of challenges. This is as a result of the increase in the cost of  roofing materials that leads to an increase in the demand of engineer to keep the demand for the material from fluctuating. The best way to handle such a situation is by hiring a company that can perform the job in the right manner and in such a way that can slightly reduce all the fuss. Using the right and the trustable company guarantees a better result. As mentioned above anything that is involved in the construction process is known as a colorbond roofing material and there are further kinds of  roofing materials that can be used in the construction process such as Zincalume. Always consider the below features in any company where you are planning to purchase your roofing. Reliability - A good company should have everything that is convenient for the user. The customers are after a company that has all the necessary tools at its disposal. They do not need a company that lacks the most relevant tools at their disposal. The suppliers of the roofing material will create space for the storage of supplies in a timely manner. Customer services -  To hire the right supplier, you have to be familiar with the construction stages from the start to the end. An expert can take you through the entire process from the start to the end and it becomes vital to winning clients trust for the best supplies. Once you have purchased, you will need to be more careful about the customer service that is helpful to the customer in the process of construction. Good customer service builds the customers confidence towards the company. Ensure the delivery is done on time - Every supplier should be careful when it comes to the delivery process since the construction sites are growing rapidly now and then. The truth is that every construction project has to adhere to a certain schedule. This is essential especially if you desire to receive materials on a regular basis.  When planning to build a new property, you will require to take advice from the COLORBOND roofing supplies company based in Australia. Irrespective of how you want your dream home to look like, you will always need assistance from the most appropriate building companies and also the supplies companies to the ease the work.