At the Passive House job site in Falmouth, Massachusetts, architect Steve Baczek specified a mudsill gasket.
But to make sure that the gap between the top of the foundation and the sill plate didn’t leak, Baczek took a belt-and-suspenders approach by also specifying the use of Tremco acoustical sealant. Sold in tubes at specialty retailers and online, the black sealant installs easily with a caulk gun. It’s exceedingly sticky and highly elastic, and unlike construction adhesive, it never cures.
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GBA Pro members have access to all of the videos in the Passive House video series.
Here is the link to the “Airtight Mudsills” video.
To see Episode One of the series, click here: “Passive House Design.” (The first episode is available to all GBA readers, including non-members.)