Today it’s starting to look like a house. The rafters and dormers on the second floor bedroom section are done. The roof rafters 18′ x 12″ TJIs were a challenge to get up. It took much longer than the framers though. You can see from yesterday’s photos how they had to swing them into place. It also looks like we can’t use the window designed for the second bathroom because of the angle of the porch roof. We will swap it with a smaller one form the office.
Backfill and rough grading is done and a pad is set up for the shed.
Family Room end
In the first photo the Bilco door crew was still on site, the excavators started backfilling and the framers were working on the roof rafters. Look how long the rafters are and the framer swing them into position to be lifted up. A very uneventful day other than it was the first day of Deer season and shotguns were going off in the distance and deer were running around.
Three things at once.
Second floor framing
Doing the roof rafters.
End of Day
Just a rainy day in Jersey. Just the Township’s back fill inspection today, passed.
With a full day of rain forecast for today and tomorrow the isn’t any progress, the bilco door system is rescheduled for Monday. They need dry weather for their seal to dry properly.
But since the sill plate seal is so important and different with the Thermomass CIP foundation I thought I’d post the design and photos of the result. My engineering friends have never seen a sill plate like this.
A house looses about 20% of it’s heat energy through the basement. So to build a high efficiencies house you have to start with the foundation. There are a number of ways to add insulation to the foundation.
- The outside: you can attach XPS panels on the out side walls. This didn’t make much sense to me, because I didn’t see how this would keep the concrete wall from trying to get to the ground temperature.
- The inside: putting insulation on the inside wall is better than the outside, but there are a number of choices. Sprayed open-cell foam. A good solution if your finishing the basement, I wasn’t . Another is attaching XPS to the inside wall, there are a couple of ways.
- Both sides: ICFs (Insulated Concrete Forms) are another choice. But I saw issues and looked for a better solution
- In the middle: Thermomass CIP system. Four inches of concrete, four inches of XPS (R-20) and four inches of concrete. The exterior wall adjusts to the ground temperature (apx. 55 degrees; the inside wall is a big mass that adjusts to the basement temperature (65 degrees); nd the four inches of XPF keeps them apart. Plus blocks moisture from migrating through the wall. That very large thermos mass of the inside concrete wall will hold the basement temperature.
So the Thermomass CIP solution made the most sense to me. I met with the local Thermomass rep, Gary Pascoe, and I was sold. A Deptford concrete company Manone Construction gave me a quote. The XPS panels have non-conducting stand-off the center them in the forms, concrete is poured on either side of the XPS. See photos of the insulation panels being installed.