The cedar structual members were stamped. And it was kiln dried and surfaced 4 sides. It is the only a few homes I have ever seen with structural grade stamps on cedar[ SEL STR NO. 2 S4S WRCLA CEDAR ]. The house was a custom home in the Sierra Nevadas designed to be 80%+ heated on solar energy (water and HVAC). We later added a propane central furnace and replaced the wood stove. Western Red Cedar is highly insulating, very light weight, and stable against shrinking or swelling. Structural grades are still manufactured in Oregon and in select runs at some California mills.