As this building comes out of the ground, it is crucial to continue the tight air barrier in this Passive House.  The details of the buildings are designed so that every possible break in the air barrier can be managed.  Our crew is well equipped with some of the best tapes in the industry, including the Tescon Vana tapes seen in these images.  

Air barrier comes up from under the footing to be taped to the under slab layer

Air barrier comes up from under the footing to be taped to the under slab layer

After the air barrier has been sealed, the masons pour the concrete slab

After the air barrier has been sealed, the masons pour the concrete slab

Every seam is sealed with special tape - this is the Tescon Vana

Every seam is sealed with special tape - this is the Tescon Vana

In order to become a certified Passive House, homes must pass a final blower door test in order to comply with .6 air leakage requirement or LESS. For context, Maryland homes only have to have 3 or lower to pass the energy code. 

CMU Block air barrier is kept long, ready to overlap and be taped to plywood sheathing. 

CMU Block air barrier is kept long, ready to overlap and be taped to plywood sheathing. 

tape! tape!

tape! tape!

Every penetration coming up through the slab, is sealed with the same tape

Every penetration coming up through the slab, is sealed with the same tape