Step 1 Build the Fireplace Frame
Start by building a 2x4 frame and attaching it to the top and bottom of the wall with 3-inch screws. Consider how high you want the fireplace feature wall to sit off the ground and add height accordingly using extra lumber. Once your base and top are in place and secured, add vertical 2x4’s to attach them together, similar to how you would frame a new wall. Place 2x4’s on either side of the location of the fireplace insert as well as on top of it to frame it in. These studs will be what your shiplap will mount to. You can also add a piece of plywood underneath your fireplace insert for extra stability, just make sure to account for the extra height it adds. Once your frame is complete, grab your shiplap wainscot and get ready to attach it to the studs.