Did we make this house TOO AIR TIGHT?? I may have found the ultimate vapor barrier and air control system on the market! I am always looking to new ways to improve and provide a better system for my clients and while looking for that perfect system, rockwool and SIGA Majrex kept coming up. Because we are in a cold climate we need a vapor barrier on the interior side of our insulated wall. The SIGA Majrex is a smart vapor barrier and I believe one of the only like it on the market. It allows for drying from the inside of the wall cavity out but also doesn't allow vapor to permeate into the wall cavity. Have you ever used SIGA Majrex? It installs quite easily and I believe thanks to the way we frame our post frame homes, the Majrex will perform exceptionally. If you are curious about electrical and plumbing...stay tuned and subscribe for more information and how to on this barndominium we are building. This Barndo as well as other RR Building Plans are available here. https://rrplans.bigcartel.com/ Milwaukee Stapler https://amzn.to/3Kihci1 Siga Majrex https://www.siga.swiss/us_en/products/majrex