Building a Smoke Shack

You bet you could, just buy the rolls of Insulation and tack them between the 2x4s then put up the dry wall (Make sure you run Elec. etc first). I didn't put an roof overhang on the front or back (Lazy) so I had to put some "z" Flashing where the SmartSide Wall meets the Gable to prevent water getting in (I will take a photo tomorrow) I decided not to vent through the roof/shingles but will be putting in a vent of some sort into the gable (Haven't thought that far ahead yet LOL)