Blackbutt Riser

18mm Timber Stair Riser

Complete your staircase with our 18mm thick solid timber stair riser, crafted for a secure fit and stability in closed-style Queensland homes.

Dimensions & Profile:

• Thickness: 18mm (Finished at 17.5mm to fit into tread groove)
• Rise: 170mm, 175mm, 180mm, 185mm or 190mm option (all sizes are 10mm larger to allow for 10mm groove into under side of 30mm treads)
• Drilled: 4mm Clearance holes to be screwed into back of treads

This riser is designed for closed housed stairs (traditional enclosed designs with visible strings) and closed sawtooth stairs (cut stringer styles with invisible strings). It fits perfectly into the 20mm deep riser groove on our 30mm standard treads, ensuring a clean, gap-free assembly for safe and sturdy steps.

Perfect for both new builds and renovations, the 18mm construction provides reliable support and a subtle, integrated look that complements contemporary, coastal, or traditional designs.

Key Benefits:

• Easy installation with precise dimensions for quick groove fitting
• Smooth, sanded surfaces ready for your choice of stain, oil, or clear finish
• Naturally beautiful grain and tones that add warmth and character

Available in both 1m and 1.5m lengths to suit your project. All products are delivered raw, pre-finished sanded to 100 grit.

Blackbutt, a premium Australian native hardwood (Eucalyptus pilularis), boasts a clean, uniform appearance with pale golden-brown to straw tones and a straight, even grain—occasionally accented by subtle gum veins for added rustic charm. Exceptionally durable and fire-resistant, with high density and strength, Blackbutt excels in high-traffic areas and is ideal for stair components that demand longevity and low maintenance. Its neutral palette complements contemporary and coastal  interiors, while its natural toughness makes it suitable for treads, stringers, risers, and handrails that stand up to everyday family use.