Is Flexoflash cheaper than lead flashing?
Flexoflash is usually cheaper than lead flashing by around 20% based on a per lineal meter rate. It’s important to remember that all our flashings come in a 5m roll. Lead usually comes in 3m roll.
Can you use Flexoflash to fix existing faulty/leaking lead flashing?
Yes the easiest way is to lift up your existing lead and install Flexoflash directly underneath it. You can install the Flexoflash in full 5m lengths. Then dress down the existing lead over the Flexoflash as an over-flashing. You can trim the existing lead back if you want a smaller over-flashing. If you completely remove the lead you will need to chase the Flexoflash back into brickwork, or go underneath the facia.
Where can Flexoflash be installed?
Flexoflash can be installed in any situation where traditional lead flashings is installed: Abutments, Dutch Gables, step-flashings, chimneys, sky lights, and used as a penetration flashing. Flexoflash can be installed on all roofing material types, including but not limited to: Tile, Colorbond (metal), Polycarbonate, Copper and Zinc. Flexoflash can’t be used on a flat roof, or in the middle of a roof as a patch. The roof that Flexoflash is installed on must be at least a 5 degree pitch.
Can Silicone, Sikaflex and Glue be used on Flexoflash?
If you need to use a sealant then we recommend using Sikaflex Pro. Roofer’s silicone and glue is not recommended. Sikaflex Pro should not be used between the roof material and the Flexoflash itself though, as this will affect the adhesive performance of the butyl strip.
Can you clean the area with acid and then install Flexoflash?
Acid wash is usually diluted and doesn’t affect the Flexoflash but it is recommended to do the acid wash before installing and give the Flexoflash a good hose down with water to ensure the acid isn’t sitting on the Flexoflash.
Can Flexoflash be installed on corrugated roof profiles?
Yes, Flexoflash is compatible with metal & polycarbonate roofing materials and can be easily stretched to provide a tight fit on corrugated profiles.
Can Flexoflash be installed over Asbestos?
Yes, as the full adhesive backside will apply firmly to asbestos. It’s important to brush clean as much as possible to get best adhesion.
Can Flexoflash be used as Dampcourse?
Yes, Flexoflash is fully tested to AS/NZS 2904:1995 Damp Proof Course & Flashings.
Can Flexoflash be painted?
We don’t recommend painting Flexoflash because most types of paint won’t adhere well to its surface.
Can Flexoflash be installed if you have a water tank for potable water?
Yes, Flexoflash is completely non-toxic and it fully tested to AS/NZS 4020:2005: Products in contact with drinking water. Flexoflash will not change the colour or taste of water it comes in contact with.
How do I install Flexoflash?
In the same way as you would install lead flashing. Flexoflash is installed horizontally for abutments, gables and pitches roofs where there is a facia or cladding on the second storey level. If Flexoflash is to be installed on a pitched roof on a brick second storey then it must be
How is the installation of Flexoflash different from lead?
Flexoflash can be installed in full 5m lengths whereas Lead (20kg for external flashings) must be installed in sheets no longer than 1.5m with 150mm over-lap when joining sheets, so Flexoflash is up to 50% quicker to install than lead and no specialist tools are required.
Flexoflash only requires a 40mm over-lap to join rolls and it self-fuses forming a watertight join.
20kg lead flashing is very heavy and difficult to move around the roof but Flexoflash is very light, it’s only 4.3kg for a 280mm x 5m roll so it’s much easier to install. Flexoflash can be installed on all common roof materials (including metal roofs).
Flexoflash is available in 2 widths: 280mm and 370mm. And 3 colours: Grey, Black and Terracotta.
Can Flexoflash be stuck up against the brickwork, rendered wall or facia?
No, Flexoflash must always be built in, chased in or mechanically over-flashed to ensure the warranty is valid. A mechanical over-flashing such as a metal strip can be used in some instances. Please check with your local building codes. Flexoflash is not covered by the warranty if it’s just adhered to external brickwork or facia.
Can Flexoflash be used on Metal & Polycarbonate roofs?
Yes, Flexoflash does not react with any metal or plastic roofing material. Although Flexoflash is designed to replace lead flashing on tiled roofs, it can also be used on metal and polycarbonate, however, it must still be built-in, chased-in or over-flashed. Flexoflash cannot be installed in the middle of a metal or polycarb roof with the top edge exposed to running water.
Can Flexoflash be installed on a property prone to bushfire?
Flexoflash has not currently been tested to a Bushfire Attach Level (BAL). Therefore Wakaflex is recommended for fire prone areas as it has been tested to BAL29, which means is can be installed on properties in areas categorised BAL29 and below as long as the installation follows CSIRO’s recommendations, which is the correct installation with no air space behind the Wakaflex flashing.
Where is Flexoflash made and how long has it been on the market?
Flexoflash is made in Denmark. It has been on the global market for over 20 years and has been available in Australia from 2024.
What is the warranty period for Flexoflash?
Flexoflash comes with a 20 year warranty as long as it’s installed according to the installation instructions. The warranty does not cover incorrect installation, accidental damage or an instance of uncontrollable natural forces. Please see our warranty online for further information.
What is Flexoflash made of and what are its properties?
The main body of Flexoflash is made from a synthetic rubber called Polyisobutylene. It’s a semi-solid rubber material that’s anti-aging, non-toxic and tasteless. Has good chemical stability and is resistant to heat, ozone and UV light. It’s also completely impermeable to water and air. The high molecular weight (not to be confused with mass) ensures it will not harden, crack or peel. The Polyisobutylene based synthetic rubber formulation used in the manufacture of Flexoflash has been specifically developed for its purpose as a lead-free flashing in residential construction.
Apart from the major advantages mentioned above it has the unique feature of being able to self-fuse on overlaps creating a completely waterproof seal when joining rolls end-to-end or on corner joins, such as around chimneys, dormer fronts, skylights, and roof mounted climate management equipment.
Within the Polyisobutylene there is an extruded Aluminium honeycomb mesh that is designed to expand and stretch when Flexoflash is moulded to the roof profile. Once the profile is imprinted into the aluminium mesh it stays in that position so Flexoflash replicates the roof profile exactly.
To ensure Flexoflash does not lift under high wind conditions and to make sure no water can be drawn up between Flexoflash and the roof surface, there is a fully self-adhesive butyl backing. This backing provides a long-lasting seal between the two surfaces.