Terra Deck – Red Merbau – Bullnose

Anyone who has had to scrub tannin stains off pool coping or light-coloured pavers after a new Merbau deck installation understands exactly why composite WPC exists. The Terra Deck Red Merbau Bullnose delivers the visual character of Merbau hardwood — that deep red-brown, that sense of quality timber on a staircase — with none of the tannin chemistry that makes real Merbau so problematic near light-coloured surfaces.

As a bullnose board, it closes off the leading edge of each stair tread. The rounded profile covers the hollow board ends at the step front, eliminates the squared sharp corner that concentrates impact and wear, and gives each step the kind of edge detail you’d expect on a high-quality hardwood staircase. It’s the finish that distinguishes a properly built composite staircase from one that was assembled quickly and left incomplete.

The Gen 5 co-extrusion polymer cap runs on all four sides of the board, matching the Red Merbau decking boards in colour and surface texture precisely. That precision matters on a staircase where the tread surface and the bullnose nosing sit directly adjacent and any colour discrepancy would be obvious.

Red Merbau works particularly well for traditional Australian homes where a hardwood staircase would have been the natural choice twenty years ago. The composite version holds that character — the richness of oiled Merbau at its best — without the oiling schedule, the surface cracking, or the tannin bleed that made real Merbau high-maintenance in the long run.

For pool surround staircases specifically, the absence of tannins is a genuine benefit. The bullnose sits right at the point where pool water, bare feet, and the deck surface all meet — any tannin leaching here would stain the surrounding pool coping immediately.