× HOME (current)
Please select State:
1300 886 944 LOGIN 0


  • 0


Item removed. Undo

Where are you shopping for today?

Delivery State:

Please note: item availability may change.
colorbond-Matt-Trimdek-Roofing-profile-metal-online Trimdek Diagram Trimdek-roofing-profile-metal-roofing-online This image shows a modern black looking home in a matt colorbond. This image shows the spacing for installing Trimdek Sheets on walls and a roof

Please select a state in the header.

Please select a state in the header.


Order online: COLORBOND® Steel MATT Trimdek roofing & walling sheets. 

COLORBOND® steel with a Matt finish provides a sophisticated and understated appearance that adds a touch of luxury. Despite its gentle appearance, it is highly durable and blends seamlessly with elegant architecture by dispersing reflected light to produce a modern and tangible visual effect.


  • .42 BMT is the steel thickness
  • We recommend a 50mm overhang into a standard gutter.
  • Delivery on the Matt COLORBOND® sheets takes approx 4 - 7 working days, depending on location.


  • 762mm is the cover width of the COLORBOND® Matt Trimdek Sheets. The actual sheet width of corrugated iron is 850mm.  
  • Rib height is 25mm
  • Minimum roof pitch: 2 degrees

Material : 

  • COLORBOND® Steel in MATT finish.

Sheet Tolerance: 

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


It is advisable to refrain from scheduling any installation until all products have been received on-site.



Warranty: 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 tested in Australian conditions, backed with the strength of the BlueScope warranty and can be relied on with total and absolute confidence. 

BlueScope offers warranties for up to 36 years for roofing and walling, which is an excellent investment for any homeowner. Choosing BlueScope means you can enjoy peace of mind knowing that your investment is protected and that you have the best quality steel products available. 



Order COLORBOND® Steel MATT Trimdek roofing & walling sheets online for seamless style and durability. Achieve the perfect blend of aesthetics and strength for your project.

It is among the world’s most popular metal roofing products due to its high quality and versatility. These Trimdek roofing panels are suitable for traditional and contemporary roofing projects alike.

How much should I allow for the sheets to run into the gutter?
We recommend a 50mm overhang into a standard gutter.

What is the ACTUAL sheet width? 
The actual sheet width of corrugated iron is 850mm.  

Which fasteners do I use for installing the roofing sheets?
Here at Metal Roofing Online, we only use and recommend Class 4 screws when installing your roof sheeting, as they last considerably longer in the elements. In a standard roofing application, when fixing to either timber or metal purlins, we have in our range a Multifix screw which is the perfect choice for this roofing iron. These can be colour-matched to your sheets. 

Installing Trimdek for Walling Using the Pierce-Fixing Method




If you are planning to install COLORBOND Matt 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 COLORBOND matt Trimdek 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 COLORBOND Matt 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. Roofs are the most important part of when building a house. They serve as our main defenders from rain, snow, heat, and basically from all the natural elements. If your roof is not reliable, then you risk your family’s safety. Getting a good roofing company may be one thing but choosing which kind of roof works best is another story. Trimdek provides the best protection you and your home deserves. It features wall cladding with bold, trapezoidal ribs and a subtle fluting in the pans. It is a very versatile roof that can even use for many commercial and industrial buildings. You have a job that requires long lengths? The Trimdek can get the job done. With Trimdek, you can even have just one sheet to cover ridge to gutter without any visible end laps, unlike in most other roofs. Despite its weight, it is made of high strength and quality steel. It has an amazing spanning capacity and can easily be reformed after any deformation. Of course, since the design is still an important aspect, Trimdek can come in many COLORBOND® colours. You may also choose to get an unpainted Trimdek - ZINCALUME®.


Trimdek - enjoy benefits for your property.

When deciding on the overall safety and protection of your property, you should definitely consider Trimdek as it is the best option for the structural integrity of your roofing system. You can get the best quality roofing material along with easy, secure and quick online ordering so that your roofing material will be delivered at your doorsteps. Moreover you can also get fast delivery when you order Trimdek from metalroofingonline.com.au so that your roof will remain in the best condition for a long period of time. You will not have to worry about the safety of your family members or the protection of your belongings when you will use Trimdek as it is the most cost-effective option for your home. You will enjoy all the kind of privileges of a strong roofing material as it will make your property look good and it will also enhance the resale value of your property.