TheScullster wrote:
"Mike Halmarack" wrote

Matched boards are traditionally thinnish tongued and grooved boards
used for paneling. The edges of the board are usually chamfered to
make a feature of the joint, unlike flooring boards.
--

Thanks Mike

What I have appears to be the cheap and cheerful equivalent of these.
Preformed panel (of mdf or similar) with milled grooves to imitate t&g.

Phil


That will be hardboard or MDF then.

Actually far more stable than pine in this application.