The mudsill is one of the most critical components of a successful Passive house. It involves a connection between dissimilar materials, and making such a connection airtight is a challenge. even the best stemwall will have some imperfections. also, the mudsill typically will be wet from its preservative treatment and from the lumberyard, and it will shrink as it dries. This means that there likely will be gaps between the wood and the concrete.
[To read more of Steve Baczek’s article from the February/March 2014 issue of Fine Homebuilding, click the link below.]