Planing is the milling of boards to create a smooth working surface that prepares the board for applying a finish and for the accurate joining of two or more boards as a broader surface.
Planing can be done on boards made of both hardwoods and softwoods.
Once boards have been planed, they are termed “finished lumber”.
“Skip dressing” is a form of planing in which a planing pass is made to reveal the underlying features of the wood such as grain, color and figure. Skip dressing leaves the board slightly over the desired finished thickness. The craftsman then further planes the board to the desired final dimension.
Pine is generally planed on four sides, whereas hardwoods are surfaced on two sides.
Milling is used to create shiplap, V-groove and tongue and groove for siding and flooring.