If you are going over an existing ceiling, you may install the tongue and groove directly over the drywall, ensuring you use nails long enough to reach the joist (e.g., 2 1/2-inch nails).

Most shiplap and tongue and groove planks are wood. If you plan to paint the finished paneling, you’ll save money by using inexpensive pine planks or MDF, both of which are available primed. If ...