Air-Sealing Tips for Efficiency That Lasts // Part 4: Protect Your Air Barrier
This is part 4 of a series that describes how to air seal the most difficult parts of buildings. A service cavity and vented rainscreen promote durable airtightness.
Dense-pack cellulose insulation is a very useful and cost-effective technique for lowering both conductive and convective heat losses in a variety of housing types. [continue reading]
Multifamily buildings vary widely. They range from houses divided into three apartments to 500-unit high rises. So a weatherization project must be tailored to fit the personality of the building. [continue reading]
An understanding of some basic energy concepts is essential to choosing appropriate windows and skylights. [continue reading]
Urethane foams can make a major contribution to improving the energy efficiency of buildings when they are used as an air leakage control material or as a component of an air barrier system. [continue reading]
Most newer manufactured homes in the Pacific Northwest, as well as many older mobile homes, have a vapor retarder on the inside of the wall cavity--typically right behind the gypsum board. However, many older mobile homes, especially those built before the 1980s, were manufactured with a vapor retarder on the outside of the wall cavity--generally right behind the metal (or sometimes wood) siding. [continue reading]
Just because a wall has R-19 insulation in it does not mean it's an R-19 wall. Using the R-value of the insulation between the studs (the "cavity R-value") as an overall wall R-value is similar to using the center-of-glass value for a window--it ignores the effect of framing. [continue reading]
Julie Michals is the Director of Clean Energy Valuation at E4TheFuture. In this role, her focus is on initiatives ...
One look at the phone book or online listings of HVAC contractors these days and you will see that there ...