Covering a wall in wood is a dramatic alternative to the usual plaster or drywall, giving a solid old-world look to the room. Tongue & groove pine boards made for wall application are available at your local home-improvement store, and can be installed with a standard finish nail gun. This is the same process as installing cedar boards in a closet. The concept is similar to hardwood floors, with the tongue and groove milling connecting the boards.
Find all the studs in the wall, using a studfinder. Mark them with a pencil and level, drawing vertical lines from top to bottom.
Draw a horizontal line across the base of the floor, at a level equal to the width of a board and another 1/2 inch. (Example: If the boards are eight inches wide, the horizontal line should be 8 1/2 inches off the floor.)
Measure across the wall. Cut a pine wall board to that length, using a mitre saw.
Set the board against the wall, near the floor, with the tongue side facing up and lined up under the horizontal line. There should be a 1/2 inch space left at the floor. Secure the board with your finish nail gun, shooting in two nails, near the top and bottom of the board, at each point where the board crosses a stud.
Use the mitre saw to cut a second board to the length of the wall. Place it above the first board, connecting the groove of the second board down over the tongue of the first. Secure the upper board with nails through the top edge, just above the tongue, at a downward angle (rather than through the face). Put one nail in at each point where it crosses a stud.
Repeat for each board going up the wall. Use a table saw to length-cut the top plank, so it fits near the ceiling with a ½ space left there. The gaps will be hidden when you install your floor and ceiling trim.
Repeat for each board going up the wall. Use a table saw to length-cut the top plank, so it fits near the ceiling with a 1/2 space left there. The gaps will be hidden when you install your floor and ceiling trim.