Structural Flooring
Big River Group supplies structural flooring for residential and commercial construction: particleboard and plywood sheet flooring, compressed fibre cement for tiled and wet areas, concrete and AAC floor panels, and floor framing.
Looking for a finished floor? See Timber Flooring.
Showing 14 products
Quick Contact
By submitting this form you agree to our Privacy Policy.
AlphaFloor
Australia's only cost-effective solid concrete floor system - lightweight, high-performing and built for modern construction.
Durafloor®
Durafloor® provides one solution for substrate in interior wet areas such as bathrooms and laundries, as well as a range of exterior applications.
e-beam
e-beam is an Australian-made LVL engineered for Australian construction conditions used as a high-performing alternative to traditional timber and steel.
Walls, Floors, Columns & Beams
e-joist
Wesbeam e-joist and complete floor systems bring services-friendly flexibility with faster installs, predictable costs and design optimisation.
Floors & Floor Systems, Walls, Roofs, Rafters
EnduraFloor by Laminex
Structural Particleboard Flooring EnduraFloor by Laminex™ Particleboard Flooring is proudly manufactured in Australia.
Flooring applications
Frame & Truss Solutions
Big River operates three state-of-the-art frame and truss manufacturing sites across Australia strategically located in Breakwater, Victoria, Dry Creek, Adelaide, Bellevue, Perth.
Framing
Hardie™ Ceramic Tile Underlay
Hardie™ Ceramic Tile Underlay is an internal underlay for ceramic tile finishes which helps protect against movement that occurs naturally in timber, particleboard and plywood substrates.
Hardie™ Panel Compressed Sheet
External balconies, verandas & wet areas.
Hardie™ Secura™ Flooring
Lightweight cement composite structural flooring by James Hardie, in 19mm interior and 22mm exterior sheets.
Floor substrate and finishing
Innova Ceramic Tile Underlay
eramic Tile Floor Underlay is a specially formulated fibre cement sheet, designed as a stable substrate for slate and ceramic floor tiles.
Innova Compressed Flooring
Compressed flooring is a premium substrate, primarily used in commercial applications for high-load areas.
MaxiFloor Structural Flooring
Engineered flooring system for residential and commercial builds.
Multi-storey floor systems
How to Choose the Right Structural Flooring
Particleboard or Plywood
Particleboard sheet flooring is the most common structural subfloor in Australian homes. It is made to AS/NZS 1860.1, and our range includes yellow tongue flooring and EnduraFloor by Laminex. For floors that carry highly concentrated loads, such as commercial and industrial floors, T&G structural plywood is available in 15, 17, 19, 21 and 25mm.
Thickness and Joist Spacing
Particleboard flooring comes in 19mm, 22mm and 25mm, and the colour of the tongue shows the thickness. Each brand uses its own colours: STRUCTAflor uses yellow for 19mm, red for 22mm and blue for 25mm, and Laminex uses green for 19mm, beige for 22mm and brown for 25mm. 19mm suits floor joists at up to 450mm centres, 22mm suits joists at up to 600mm centres, and 25mm is made for commercial floors. 19mm particleboard flooring is commonly called yellow tongue flooring, after the STRUCTAflor colour. Check with your local Big River location for the brands and thicknesses in stock, and confirm the span capacity for your framing before ordering.
Wet Areas and Tiled Floors
Particleboard flooring is moisture-resistant, not waterproof. In bathrooms, laundries and toilets it can be used beneath an impervious floor surface, provided the floor is waterproofed to AS 3740. For tiled balconies and tiled internal wet-area floors, Hardie Panel compressed sheet is a durable alternative to particleboard and plywood, and ceramic tile underlays from Hardie and Innova go over timber, particleboard and plywood floors as a base for ceramic tiles.
Technical Support
Your local Big River location can help with product selection and delivery to site.
Frequently Asked Questions
What thickness particleboard flooring do I need for 600mm joist spacing?
Use 22mm particleboard flooring for joists at up to 600mm centres. Its tongue is red in the STRUCTAflor range and beige in the Laminex range. 19mm sheet, commonly called yellow tongue flooring, suits joists at up to 450mm centres; its tongue is yellow in the STRUCTAflor range and green in the Laminex range. Check with your local Big River location for the brands in stock, and confirm the span capacity for your framing before ordering.
Can particleboard flooring be used in wet areas like bathrooms?
Yes, beneath an impervious surface, provided the floor is waterproofed to AS 3740. The particleboard is the structural base, not the waterproof layer. For tiled wet-area floors, compressed fibre cement such as Hardie Panel is an alternative substrate.
Visit Your Local Big River Location
Find specialist building products and expert advice at your nearest Big River Location.