Kogarah | 180mm Spotted Gum | 32mm Treads | Bona Traffic

Boral Spotted Gum Flooring with Custom Stair Detailing – Residential Upgradeion

Project Overview

This residential renovation in Kogarah called for a durable, architecturally cohesive timber flooring system throughout key living zones and a central staircase. Madera Floors was commissioned to design and install a full subfloor system over concrete, incorporating Boral Spotted Gum in a wide board format. With a mix of modern and custom elements, the project featured tailored stair treatments and commercial-grade finishing to suit a high-traffic family home.

Scope of Work:

Supply and install builders plastic over concrete slab
Supply and install 15mm plywood substrate, pre-drilled and mechanically fixed
Supply and install Boral 180mm x 20.5mm Spotted Gum flooring, glued and top nailed to plywood
Install cork expansion strips where required
Form and install box step at garage entry
Custom staircase install: 32mm solid Spotted Gum treads and 19mm risers, including ply packers for levelling
Supply and install hardwood veneer cladding to rounded starter riser
Install Spotted Gum nosing trim to hallway and rumpus thresholds
Sanding and finishing: 3 coats of commercial-grade Bona Waterbase in satin sheen

Material Details

Species: Spotted Gum (Boral)
Grade: Standard & Better
Dimensions: 1890mm x 180mm x 20.5mm
Subfloor: 15mm structural plywood
Finish: Bona Waterbase, Satin Sheen
Installation: Glue-down and top-nail over ply
Stairs: 32mm solid treads, 19mm risers, custom veneer to curved riser

Design Notes

The selection of Boral Spotted Gum offers a distinctive grain and tonal variation that complements the home’s warm palette and natural light. The satin waterbase finish enhances the timber’s richness without excessive gloss. Madera’s stair detailing — including the curved veneer riser and solid nosing trims — reflects a bespoke approach that adds character and continuity to the transition between levels. The full ply substrate ensures long-term performance and dimensional stability.