My current sugar house stayed plenty warm when we were boiling with a masonry arch on a flat pan, even in the wind. When we went to an air tight 2x6 then people started to get cold. I can appreciate the thought of prevent the cold air from whipping through, especially if I want to keep any company in the sugar house once the sun goes down. I purchased some 12x16timber frame plans from a website and hope to get it up before the 2023 season, I'll likely frame in some walls with moisture barrier and possible foam insulation with some company in mind. For some reason I never get cold, maybe I'm just too busy to think about it while I'm boiling, lol.
2023 - 38 Gallons - RO broke, Buckets didn't run, rebuilt vacuum pump mid-season, still made good syrup!
2022 - 52 Gallons - DIY RO, 50% less fuel, no late nights in the shack!
2021 - 48 Gallons - new pans, new arch, lots of new taps and tubing
2020 - 32 Gallons
2019 - 27 Gallons