Why do traditional lead and corrugated roof flashing often fail on Aussie roofs? Because they’re dangerously heavy and a nightmare to fit on ladders.
Wakaflex makes your install 50% faster. It dresses into deep iron ribs without heavy tools. Plus, it creates a self-welding seal safe for rainwater and bushfire zones.
This guide explains why switching to Wakaflex is the smartest move for your next corrugated roof project.
Key Takeaways
- Rib-Conforming Power: Wakaflex conforms to any rib profile without needing custom folds or workshop orders.
- Self-Bonding Tech: Overlapping sections bond together to create a one-piece seal in twenty minutes.
- Health First: Lead-free materials keep your tank water safe for the whole family to drink.
- Bushfire Ready: It’s the only flexible flashing with a BAL-29 [1] rating for extra peace of mind in high-risk zones.
Wakaflex installs 2x faster than metal flashing. Cuts with scissors. Self-bonds. BAL-29[2] rated. No lead contamination.
5-Minute Wakaflex Install Preview
You can complete a professional installation in less time than it takes to have a coffee break.
- Clean: Scrub the roof surface to remove dust and oils (2 min).
- Cut: Use snips to cut your Wakaflex to the required length (30 sec).
- Press: Position the material and press it into the corrugation peaks (1 min).
- Dress: Use your hands to dress the material down into the valleys (1 min).
- Overlap & Press: Activate the self-welding bond by overlapping the joins and pressing firmly (30 sec).
Total: 5 mins. No lead dresser. No silicone.
Why Traditional Lead and Metal Flashings Aren’t Preferrede
Traditional lead is heavy, toxic, and difficult to work with when you’re standing on a ladder. Rigid metal flashings often require custom workshop orders that slow down your project by days or weeks.
- Lead Risks: Lead particles can wash into your rainwater tanks and contaminate your water supply.
- Installation Pain: Custom metal flashings are unforgiving if your measurements are off by even a few millimetres.
- Weight Issues: Carrying heavy lead rolls up a ladder is a major safety risk for any DIYer or tradie.
- Corrosion Concerns: Standard metal flashings can rust or corrode when they come into contact with different types of roofing materials.
Modern corrugated iron roof flashing needs to be flexible enough to handle the expansion and contraction caused by the Aussie sun. Wakaflex solves these problems by providing a malleable sealant that moves with your roof while staying 100% watertight.
Wakaflex vs Traditional Corrugated Flashing
Corrugated roof flashing and Wakaflex solve the same problem: waterproofing roof junctions. But in reality, they’re completely different materials with opposite installation approaches.
One requires workshop fabrication and heavy tools, the other cuts with scissors and sticks by hand.
| Feature | Rigid Metal / Lead | Wakaflex Lead-Free |
| What it is | Rigid sheet metal (Colorbond steel, zincalume) pre-cut to match corrugation profile | Flexible butyl rubber tape with aluminium mesh core + adhesive backing |
| Physical form | Flat or pre-profiled metal sheets (apron, barge, valley flashings) | 5m rolls (280mm-560mm wide), stretchy like thick duct tape |
| Weight | Heavy and high risk (15-20kg per 5m roll) | 4.5kg per 5m roll |
| Flexibility | Minimal (requires folding, lead dressing) | Stretches 50% in both directions |
| Sealing | Requires messy silicone + sealants | Chemically self-welds (50mm overlap) |
| Speed | Slow and specialist (hours + workshop) | Up to 50% faster (5-min installs) |
| Safety | Toxic (contaminates rainwater tanks) | AS/NZS 4020 certified safe |
| Bushfire Rating | None or custom fabrication | BAL-29 rated |
| Temperature Range | Brittle in extreme heat/cold | -40°C to 100°C |
| Installation Tools | Lead dresser, mallet, brake press | Scissors + hand pressure |
| Warranty | Varies by fabricator | 10-year warranty |
Discover more ways you elevate your next install in our guide: Safe, Flexible, and Reliable Roof Flashing Solutions with Wakaflex.
Chimney Flashing for Corrugated Metal Roof Projects
Sealing a chimney flashing for corrugated metal roof installations is the ultimate test for any roofing material. Rigid metal struggles to bridge the gap between the flat chimney wall and the deep metal ribs of the roof.
- Malleable Seal: Wakaflex dresses down into the corrugations easily to stop water tracking back under the sheets.
- Non-Scratch Design: The polymer surface won’t scratch the paint on your new metal roof during installation.
- Weather Proof: It stays flexible in temperatures ranging from -40 to 100 degrees Celsius.
- Permanent Bond: You simply press it into the profile to create a tight, professional seal that looks great.
End Wall Flashing for Corrugated Roofing: The Perfect Install
End wall flashing for corrugated roofing is often where DIYers get stuck because you need a transition that stops wind-driven rain from entering the wall cavity.
- Zero Competition Hack: Using Wakaflex as your end wall solution is a smart way to get a trade-quality finish without complex tools.
- Dual Bonding: It bonds to the wall surface and the corrugated roof simultaneously to create a continuous barrier.
- No Folds Needed: You don’t need a trade professional to fold complex metal angles in a workshop.
- Universal Fit: It works perfectly on corrugated iron, metal, and even polycarbonate roofing sheets.
Step-by-Step: How to Install Wakaflex on Corrugated Iron
Follow these steps to get a professional, watertight seal on your corrugated metal roof flashing project.
- Surface Prep: Clean the corrugated metal thoroughly to remove any dust, oils, or loose debris.
- Measure and Cut: Cut your Wakaflex to the required length with standard snips or heavy-duty scissors.
- The First Press: Peel the backing and press the material into the top of the ribs to set your position.
- Dress the Ribs: Work the material down into the valleys of the corrugated profile using your hands.
- Press to Seal: Use firm hand pressure to ensure 100% contact across the entire surface and the wall.
- Self-Weld Overlaps: Ensure any joins have a 50mm overlap to activate the permanent chemical bond.
Tools Needed for Your Project
You likely have most of these tools in your shed already, which makes this a very cost-effective DIY project.
- Cleaning Cloth: Use a damp cloth to clean the roof surface before you start the installation.
- Standard Snips or Scissors: Use either to cut the Wakaflex material to your exact length.
- Work Gloves: Use these for firm, even hand pressure when sealing the overlaps into the corrugations.
- Measuring Tape: Use this to ensure your 50mm overlaps are accurate for the self-welding tech to work.
Why Wakaflex is the New Sealing Standard
Choosing the right seal for your corrugated roof ensures your timber frame stays dry and rot-free for decades. Wakaflex is the smartest choice for Aussies who want trade-quality results without the toxic risks of lead. It’s faster, safer, and more durable in our local climate.
Ready to upgrade your roof with the modern sealing standard? Shop Wakaflex – the easy to install lead-free roof flashing roll for all roof types!
Frequently Asked Questions
What is the best corrugated roof flashing?
Wakaflex is the best choice for modern corrugated roofs because it’s lead-free and self-welds to create a permanent seal. You can install it 50% faster than traditional metal without using any specialist trade tools or custom workshop orders.
Is Wakaflex safe for corrugated iron roofs?
Yes, it’s 100% compatible with all corrugated iron and metal roof profiles used in Australia. The flexible aluminium mesh core allows it to dress into deep ribs while remaining UV stable for many decades in the sun.
Do I need silicone for corrugated flashing?
You don’t need messy silicone or adhesives when you use Wakaflex on a corrugated metal roof. The material features a chemically self-welding property that creates a watertight bond when you overlap the sections by at least 50mm.
Is Wakaflex bushfire rated?
Wakaflex is the only flexible lead-free flashing on the Australian market with a Bush Fire Attack Rating of BAL-29.[7] This makes it the safest and most reliable option for homes located in high-risk Aussie bushfire zones.
Can I install corrugated flashing on a chimney myself?
Yes, you can install chimney flashing for corrugated metal roof projects yourself using Wakaflex and firm hand pressure. The flexible material makes it easy to bridge the gap between the wall and the ribs without needing trade experience.
How much Wakaflex for a standard chimney?
One 5m roll with a 280mm width covers most standard chimneys. You should use a 370mm width for complex brickwork or double the roll-up if you need extra height for the seal.