Building My Net Zero Energy Home: Floor Joists

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In this photo, one of my workers, Joy Coyle, is helping install the band joist from which we will hang the floor joists. Because the band joist an area where a lot of energy moves in and out of a home by infiltration and exfiltration as well as conduction, we attached it directly to the inner surface of the ICF foundation wall.

With the foundation walls poured my two workers and I installed the steel beam and floor joists. Joists were attached to the steel center beam by hangers (shown in the center of the photo). The other ends of the floor joists were attached to the band joist. We suspended the joists by hangers. This design eliminated all bridging loss through the band joist, and, thanks to this choice and other design features, all air movement as well.

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