Very good looking building. Hope everyone stayed cool.

Swing out next week and handle the 40x70 we need to add next to our shop real quick

One company builds Brandos like this one. They put a zip system around the frame, then spray foam.

Just the one company does it. Most others do not.

Your Thoughts on the zip system for a home like this?

Some say it’s not necessary. Others say it may make the home too air tight.

Myself and two very experienced and smart colleagues discussed this at length on my house.

I elected not to do that. I did not want any wood on the outside of my house.

Spoke with my foam installer. We were framing when he came out. I asked about applying a vapor barrier to the outside of my studs. He said it was not necessary. Good thing, because my studs are steel. You are not going to staple Tyvek to steel studs.

We installed the wall sheets directly to my studs. Foam guy shot 1" closed cell foam on the back sides of the sheets. Then a second pass with 2.5" of open cell foam. Roof got 7-9" of open cell foam.

The house is as tight as a drum! 3625 square feet, and it costs the same to heat and cool as the 1500 square foot house, built in 1967 that I sold.

The house is so tight, that in spring and fall the humidity rises in the house. That is because the thermostat does not tell the system to kick on, so air doesn't get exchanged. Meaning the heat or air just is not running almost at all, when we've got moderate temps outside.

Looks great.