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More Information on COLORBOND® Apron Flashing

What is an Apron Flashing?

Apron flashing is a type of roof-to-wall flashing used to seal the joint where a roof meets a vertical surface such as a wall or chimney or vertical wall. It acts as a watertight seal, directing rainwater away from vulnerable junctions and preventing leaks or long-term structural damage. Apron flashing prevents water from entering critical points where the roof meets a wall, chimney, or other edges. The purpose of apron flashing is to provide waterproofing at vulnerable points and edges, including where shingles meet vertical walls.

Made from genuine COLORBOND® steel, apron flashings provide a neat, durable finish that enhances both the function and appearance of corrugated and sheet metal roofs. Proper installation of apron flashing helps protect the roof space from water ingress.

Common Apron Flashing Mistakes

❌ Cut too short – leaving gaps where water can enter, which can also leave the roof edge and fascia exposed to water ingress

❌ Installed without overlap – reducing its ability to shed water

❌ Incorrect fixings – using the wrong screws or failing to seal properly

❌ Lack of maintenance – debris build-up or corrosion causing leaks

Improper apron flashing installation can also negatively impact the performance of adjacent components such as gutters and fascia, leading to water damage along the roof edge.

Using genuine BlueScope COLORBOND® or ZINCALUME® steel reduces corrosion risks and ensures long-term performance in harsh Australian conditions.

Step Flashing vs Apron Flashing

Both are types of metal roof flashings, but they serve slightly different purposes:

• Step flashing – installed in overlapping sections (“steps”) up a wall, most common with shingle roofing.

• Apron flashing – continuous length flashing, ideal for corrugated and COLORBOND® sheet roofs, creating a clean, modern finish.

For Australian metal roofs, COLORBOND® apron flashing is the preferred solution because it matches corrugated profiles and delivers a professional look.

How to Install Apron Flashing

Apron flashing can be supplied in custom lengths to suit the specific requirements of your site.

1. Measure the required length for the apron flashing on-site to ensure a perfect fit, then mark a straight line on the flashing for accurate cutting to the custom length.

2. Ensure the break (angle) fits tightly at the roof-to-wall junction.

3. Position so it overlaps the roofing sheet and sits flush against the wall.

4. Secure with compatible fasteners (COLORBOND® roofing screws).

5. Seal all joints and overlaps with roofing-grade sealant for maximum protection.

Correct installation ensures your apron roof flashing directs water away from the junction, preventing leaks and moisture damage.

Benefits of COLORBOND® Apron Flashing

✔ Manufactured from genuine BlueScope COLORBOND® steel

✔ Custom cut to length – order the exact size you need; apron flashings are available and priced per lineal metre

✔ Full COLORBOND® colour range available

✔ Weather-resistant and low-maintenance

✔ Creates a neat, professional, watertight seal

✔ Backed by the BlueScope warranty

COLORBOND apron flashing not only protects your roof but also contributes to a seamless, finished look that adds value and style to your property. COLORBOND apron flashing can be tailored to suit a wide range of roof profiles and building facades, ensuring both protection and visual appeal.

Materials and Durability

When it comes to protecting your roof and walls from water ingress and long-term damage, the choice of materials for your apron flashings is essential. Apron flashings are available in a range of durable materials—including COLORBOND® steel, aluminium, copper, and zinc—each designed to withstand harsh Australian conditions and provide long-lasting performance.

COLORBOND® steel is a standout choice for apron flashings, thanks to its exceptional resistance to corrosion, debris build-up, and water contact. The pre-painted steel finish not only delivers a clean, modern look but also reduces the need for frequent maintenance, ensuring your roof and wall junctions remain protected and visually appealing for years to come.

For projects with unique requirements, custom flashings can be manufactured to specific lengths and profiles, guaranteeing a perfect fit for any building. This tailored approach is especially important for vulnerable areas such as chimneys, parapets, and complex roof spaces, where standard flashings may not provide adequate coverage or waterproofing. By choosing custom apron flashings, you can prevent water from penetrating critical junctions, reducing the risk of leaks, water damage, and long-term structural issues.

In regions like New South Wales, where buildings are exposed to extreme weather, investing in high-quality apron flashings is crucial. Properly installed flashings act as a barrier against water ingress, protecting your roof, walls, and chimney from the elements and helping to maintain the overall integrity of your building.

The availability of apron flashings in a variety of materials and colours means you can easily find a solution that suits your specific needs and complements your roofing system. Whether you’re working on a new build or renovating an existing property, selecting the right materials and ensuring a professional installation will provide peace of mind, reduce ongoing maintenance, and enhance the visual appeal of your project.

By prioritising durability and a perfect fit, apron flashings play a vital role in protecting vulnerable areas, preventing water contact, and ensuring your roof and walls stand up to the demands of the Australian climate.

Design and Planning

When planning your roof system, choose apron flashing that suits your profile and design. Consider:

✔ Roof profile (corrugated, Trimdek, etc.)

✔ Required flashing length (up to 8.0m custom cut)

✔ Colour choice to match existing roofing and trims

With COLORBOND® roof flashings, you can achieve both functionality and aesthetics in one step.

Maintenance and Inspection

Regular inspection is vital to maintain performance. Look for:

✔ Loose or missing fixings

✔ Corrosion or paint damage

✔ Debris buildup along the junction

Cleaning and resealing as needed will extend the life of your metal roof apron flashing and help prevent water ingress.

Frequently Asked Questions

What is apron flashing used for?

It seals the joint between a roof and vertical surface, preventing leaks and structural damage.

How long should apron flashing be?

Flashing is custom cut to length, typically up to 8.0m, to ensure minimal joins and a neat finish.

How do I know if my apron flashing needs replacing?

Look for signs of rust, loose fixings, or water marks along roof-to-wall junctions. Regular inspection will help identify issues early.

Order COLORBOND® Apron Flashing Online

Buy COLORBOND® apron flashing online 24/7 in the full COLORBOND® colour range. Each flashing is custom cut-to-length for your project and delivered fast across VIC, NSW, QLD, ACT & TAS. Manufactured in Australia, our COLORBOND® apron flashing is designed to withstand Australian conditions.