The plans don't call for this skin but I researched and thought about it, and finally decided to put it in place. Before installing the skin I used Great Stuff insulation to fill all the voids. I found you only need to fill a void 1/4 to 1/2 full. It will expand to fill the void within 30 minutes. I then put the 1/4" luan in place at the front of the teardrop and used straps and 2x4's to pull it into place. The 8' sheet didn't cover the full area so I marked it back at a double spar. I then removed and cut off the excess and replaced it. I used 2x4s to keep it tight against the spars.
Test Fitting the Outer Skin