After years of debating using SIPs I gave Big Sky a chance with a custom spec home that we were…read moregetting ready to build in Durango, CO. My company has successfully constructed over 50 Energy Star Certified homes since 2011 and we are always looking at more efficient and green methods of construction. Long story short, the panels were delivered two to three months after their promised delivery date. There were missing panels, mis-cut panels, large openings that were unaccounted for, header materials not supplied and THEN we waited an additional couple of weeks for the final roof panels to show up. Don't believe the hype! Your build will take longer, cost more and be no more energy efficient than a typical stick framed home. After some back and forth debate with them, they had agreed to reimburse us for many of our labor overages due to their shortcomings, but they never delivered on that promise either. Stay away from Big Sky Insulation, Big Sky R-Control and Mark Yerbic their sales rep for Colorado. There is a reason that stick framing was and still is the most efficient way to build a home. After our final blower door test, our scores were the same or even less efficient than we would have gotten with standard framing and insulation as we have done in the past.