Hi KC, Thank you so much, we are doing the best we can with the build. You are correct, we didn't need to kerf the foam insulation because it was easy to bend. We did have to take about 3/16" off the thickness for it to fit. It comes a little thicker than 3/4" and when you add the adhesive layers it's almost 1/4" too thick to fit into 1 1/2". It's amazing how much adhesive you use. The insulation in the roof took about a case and a half of the foam glue and we used over half a gallon of Tightbond II in covering the backside of the exterior walls.
All the best,
Dave