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Window Flashing

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Rainhead Flashing Order Form Sump / Tray Flashing Form EXAMPLE Flashing Order Custom Flashing Order Form
Would you like a custom flashing, sump, or rainhead? Please download the applicable order sheet and return it to us at sales@metalroofingonline.com.au

This window flashing measures: 150 x 40 x 10

Available in COLORBOND® steel & ZINCALUME®.

Flashing Tolarance: Length: + 200mm, – 0mm


If you need custom-made flashings, we’re happy to customise any measurements to suit your needs - please download the Custom Flashings Order Form and return it via email: sales@metalroofingonline.com.au


 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. 

Understanding the Importance of Window Flashing in Metal Roofing


When it comes to metal roofing, ensuring proper protection against water infiltration is crucial. One essential component that plays a significant role in safeguarding your windows and preventing leaks is window flashing. In this article, we will delve into the world of window flashings, explaining their purpose and types and why they are vital for every construction project involving windows and metal roofs.

What is Flashing?

Flashing in construction refers to a thin, weather-resistant material strategically installed around vulnerable areas of a building to prevent water intrusion. It acts as a barrier against moisture, redirecting it away from sensitive areas and protecting against potential damage.

Flashings on the Roof

On a metal roof, flashings are installed at various critical junctions to ensure water tightness. These include areas such as roof valleys, chimneys, skylights, and vents. However, the window perimeter is a crucial area that often requires special attention.

Types of Flashing: Flashing Material for Windows

When it comes to choosing flashing material for windows, a commonly used option is COLORBOND®. COLORBOND® flashing is lightweight, corrosion-resistant, and offers excellent durability. It is easy to work with and can be shaped and bent to fit specific window profiles, ensuring a precise and secure fit.

Z-Shaped Flashing: Z-shaped flashing features a bent profile resembling the letter Z. It is often used for windows' top edge and helps direct water away from the window frame.

Is Flashing Required for Window Installation?

Yes, flashing is absolutely necessary for window installation, especially when working with metal roofs. Properly installed flashings are a critical line of defence against water intrusion, preventing leaks, rot, and potential structural damage. They help maintain the integrity and longevity of the window and the overall building envelope.

Should There Be Flashing Around Windows?

Absolutely! Flashing around windows is essential to ensure a watertight seal and protect against moisture infiltration. It is a vital component in maintaining the integrity of the metal roof system and the building as a whole. Neglecting to install flashing around windows can lead to costly repairs and compromise the performance of the window and the roof.


Window flashings play a crucial role in protecting windows and preventing water intrusion in metal roofing systems. They provide a vital layer of defence against leaks, rot, and potential damage. By understanding the importance of proper flashing installation and selecting the appropriate flashing material, you can ensure the long-term performance and durability of your windows and metal roof. Invest in quality window flashings and consult with professionals to achieve a watertight and secure construction project.