Heat wants to move from someplace hot to someplace cold. It’s desire to reach equilibrium is one of the principles of the second law of thermodynamics. We have many methods and materials we use in construction to try to slow this movement. It’s expensive to condition a space and we want to hold on that space conditioning for as long as possible. One way we try to slow heat loss or gain is to prevent the wind from blowing through the home. Another is to shade the sun from beating through a window on a hot, sunny day (in some climates at certain times of the year, the sun can be a blessing). Insulation is one of the big ones we use to provide comfort to homeowners.
Continue reading “Construction Materials-Cavity Insulation”
This post originally appeared on GreenBuildingAdvisor – Green Building Advisor is the one-stop source for builders, remodelers, architects & homeowners looking for expert advice on green products, strategies & proven construction details.
I was introduced to using closed cell spray foam (CCSF) below a slab a few years ago by New England contractor Wade Paquin of WKP Construction. He was insulating the below grade slabs of his new homes by spraying a couple inches over a bed of stone, then pouring the concrete. I have now had the opportunity to try this insulation method over a couple projects, Continue reading “Construction Design-Closed Cell Spray Foam Below a Slab”
Expanding spray foam is a two-part chemical process involving isocyanate and poly resin, which when combined in the right mixture will expand 30 to 60 times it’s liquid volume. Continue reading “Construction Materials-Spray Foam”