Spray foam has been the subject of much discussion in green building circles. Whether the concern is installation safety or global warming potential or better energy performance, it seems there’s no shortage of debate. Along these lines, the guys at 475 High Performance Building Supply, a Brooklyn-based provider of products for high-performance projects, have a list describing 13 ways foam fails, starting with the “dangerous toxic ingredients.”
If you’re planning on the International Builders’ Show in Las Vegas, expect to see not one but two modular homes built by Greenfab, the builder behind this modular, LEED Platinum home. The first home is a modified version of Greenfab’s 2100 Series home with 2,100 square feet, up to four bedrooms, and a master suite that opens to a large roof deck.
A couple months ago I mentioned the launch of Unity Homes, a new brand of prefab homes by Bensonwood, and this is the first Unity home. It’s located in Brattleboro, Vermont and the on-site assembly took just three days — with a weather-tight shell in two days. The Xyla plan has factory-built wall and roof panels that are wrapped and shipped vertically. The walls are guided in place with a crane and anchored, and then the roof panels are set. After that the crew works on taping seams, installing trim, and finishing the siding. It’s quite the process!