Today, Home Energy Partners came out to spray the closed-cell insulation for the slab and exterior walls.
Today, another 20 mil. vapor barrier was spread over gravel, in preparation for the insulation and concrete slab.
Today the foam insulation and drain were installed at the edges of the stem walls, and the CMU was sealed.
Today a 20 mil. vapor barrier was laid in the trenches. The concrete footers will be poured on top. Radon pipes were installed for future venting if necessary, and greywater pipes were stubbed-out in hopes that one day a legal greywater system will be possible.
In 1998 Marc Rosenbaum was working on a 22 unit cohousing development in Harland, VT. Amory Lovins told the client that she should build a passive solar house without any backup heat. Marc didn’t buy it, and they went back and forth discussing how it could be done. Then Marc published their correspondence at BuildingGreen.com. It’s definitely worth reading.
About a year ago he examined how much power was required for each part of his life, and he was surprised at how big his footprint is. In this talk he examines the results and talks about the changes he’s made to reduce his impact.
Saul uploaded his Power Point slides to SlideShare.
Calculate your wattage at WattzOn.com
“I bought some cans of [soy based foam] from home depot. I also bought some “Great Stuff” spray foam. I tested them side by side and the Biobased foam failed. It might have been the cold but it dried dry and crumbly. In comparison the Great Stuff dried like hard chewing gum…
Biobased foam crumbled when touched. This could be because it was cold when we installed it. But Great Stuff was installed exactly at the same time in the same environment…
This is very important because the foam is used to fill cracks. Cracks often expand and contract. The Great Stuff has an elasticity to it that the Biobased does not. Also, I forsee the Biobased foam deteriorating and becoming dust over time.”
There are pictures at the site: ecobrooklyn.com
One fog-test fan is Marc Rosenbaum, an energy consultant and founder of Energysmiths in Meriden, New Hampshire. “My experience is that if you have a blower-door specification for new construction – so many cfm at 50 pascals – and the test comes in 10 percent more than the specification, the builder will usually ask, ‘Why isn’t that good enough?’ – especially if you are fairly far along in the construction process,” Rosenbaum recently told EDU. “But when you use a fog machine, and you have fog blowing out of a hole in the building, I’ve never had anyone point to it and say, ‘Why isn’t that good enough?’ ”