The foam was $500 and I really thought I blew the money!!!! NO WAY! On humid mornings I could walk outside and literally see condensation gathering where the 2x's were for framing the walls! Probably the best money I've invested. It is twice the highest R value and a complete sound barrier... good call now that hind sight is 20/20
I would give anything if I would have done the Roof... I was having major burnout with my schedule at the time and decided to pass. THAT... I regret. I did put the Ceramic coating on the roof and that has helped I would say 99.9%... it's been an adventure just fighting the elements and space constraints. I constantly visualize and consider things before I grab any tools. Things may change in my head a dozen times before I act on something. So so far - so good. I've Gotta get running water though... temps are dropping as of today! And outdoor showers have lost their romance.