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General Tech. Information

Scyon™ Secura™ exterior flooring
What is it?

An external structural flooring substrate for tile finishes over timber or lightweight steel floor joists. Simple and fast to install, Secura™ exterior flooring helps give you extra peace of mind against moisture damage to balconies and verandahs.

Where do you use it?

As an external substrate for tiled residential balconies and verandahs. It’s an alternative to particle board, plywood or compressed fibre cement.

What are the key benefits?

SECURITY. Secura™ exterior flooring is sealed on all sides with an advanced polymer coating that helps protect the board from moisture-related problems. A topcoat on the surface of the board provides good adhesion. The continuous mesh reinforcement on the underside enhances the heavy-duty performance of Scyon™, adding extra strength and impact resistance to deliver a suitable external residential flooring substrate.

Scyon™ Secura™ exterior flooring can be up to 40% faster to install than conventional compressed fibre cement sheet. This is because it's made from Scyon™ which is about 24% lower in density than compressed fibre cement, making it lighter, and easier to handle and install, without compromising heavy-duty performance. In fact, there's no need for pre-drilling and screwing, because it can be gun nailed and is easy to cut like timber.

It's also tongue and grooved, which delivers engineered joints and eliminates the need for timber trimmers under these joints.

For balconies that aren’t over habitable rooms – verandas for example – no additional waterproofing membrane is needed once Secura™ exterior flooring is installed2. For balconies over habitable rooms, a waterproofing system needs to be applied.

MADE FROM SCYON.™ Secura™ exterior flooring is made from Scyon™, the advanced lightweight cement composite with the heavy-duty performance. Not only is it resistant to damage from termites, rot and fire1, but it can also be gun nailed and is easy to cut – like timber.


1 When installed and maintained correctly and to the extent set out in James Hardie’s published literature current at the time of installation.
2 A priming coat is recommended to be applied over all sheets before tiling, refer to the manual.


2,700 x 600 x 19mm
2,400 x 600 x 22mm

Accessories for Scyon™ Secura™ exterior flooring


Vacuum extraction with HEPA filter

Used with HEPA filter and paper bag for reduced dust exposure.

Required accessory NOT supplied by James Hardie


Cordless Drill

Recommended tool for screw fixing the HardiPanel compressed sheets.

Required accessory NOT supplied by James Hardie


Gun nailer

Suitable pneumatic or coil gun nailer.

Required accessory NOT supplied by James Hardie


Circular Saw

Dust reducing circular saw used with HardieBlade™ saw blade.

Makita: 5057KB
Hitachi: C7YA


HardieBlade™ saw blade

185mm poly diamond blade, for fast, clean cutting of James Hardie fibre cement

Required accessory supplied by James Hardie


James Hardie® joint sealant

Paintable polyurethane sealant.

Required accessory supplied by James Hardie


Fibre cement nails

For fixing to timber framing as specified.

Required accessory NOT supplied by James Hardie



For removal of excess adhesive.

Required accessory NOT supplied by James Hardie


HardieDrive™ Screw 40mm

A class 3 self-tapping wing-tipped screw for fastening to 0.8mm to 1.6mm BMT lightgauge steel frames.

Length: 40mm  SAP: 305533  Selling Unit: 500 per box


Level Straight Edge

For checking straightness

Required accessory NOT supplied by James Hardie

FAQ for Scyon™ Secura™ exterior flooring