Easy Diy Shiplap . Use 4 sanded plywood sheets in 4′ by 8′ size, compressor, nail gun, and nickel spacers to build a diy shiplap wall with great ease. Stand back and admire your work! Easy DIY Vertical Shiplap Wainscoting Bless'er House from www.blesserhouse.com I just use a circular saw and speed square. Again, the back of ours was just a thin piece of plywood. Before we started we picked an easy place to install the shiplap.