Started building a house for some young sulcatas, so they will be able to stay outside during winter. The main lumber is 3/4 inch laminated plywood that is used for form making in concrete work. It will be insulated using 3 kinds of insulation on the sides, top, and bottom. The main heat source is from panels made of 18x18 porcelain tiles. These first 3 pics show the material and the basic design, The last pic it is upside down, getting ready to insulate the bottom.