Tongue-and-groove pine boards are beadboards or planks that are available in a thickness of 3/8 inches and width of 3 to 5 inches per plank. These boards are assembled using their tongue and groove fittings to cover walls, floors and ceilings.
Normally, the tongue-and-groove pine boards are stained, painted or varnished before installation. A pine sealer is applied on the boards before staining.
When installing on the ceiling, the pine boards are assembled in a direction perpendicular to the joists. On walls, the planks are arranged horizontally. During installation, adjacent pine boards are locked together via the tongues and grooves and nailed to the studs or joists using a nail gun.