http://www.structuredhomewiring.com/images/InsulatedHorizontalWires.jpg I planned to put some wainscot, so called tongue and groove Knotty pine wood on my drywall for about 38 in tall from the ground up The dry walls is behind 2 x 4 (see photo from link) that is 16 inches apart. The tongue and groove panel is about 16.5 cm wide or 6.496 inch wide. So if I nail them at 45 degree at the tongue, every 2 out of 3 piece, I would have nothing to nail the tongue to. As they won't stick well behind the dry wall. What can I do?