The cold climate version of the Steel Case House is complete. Design Prints and Construction Prints of the new cold climate version of the Steel Case House are complete. The design now has its own page on our catalog site. The primary change from the original is the replacement of the masonry wall with a SIPs panel wall of the same thickness. This 8" thick SIPs panel greatly raises the average U value of the envelope offsetting the large window area. In northern and mountain climates we may still need to reduce the window area, but along with advanced glazing this provides more options for balancing windows with energy efficiency.