Overcoming Obstacles to Advanced Air Sealing
We all know the basics of energy efficiency. Air seal high in the building, then low, then insulate. Seems simple, right? Stop the air from leaking into or out of the building. Save money. Increase ...
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]
A new and improved version of the most widely used computer software for analyzing retrofit energy savings from utility billing data is now available. [continue reading]
The same features that are often added to the top story of homes to give them distinctive architectural beauty can also make them rather beastly to heat or retrofit. [continue reading]
Thanks for your interest in contributing a blog to the Building Performance Journal (formerly Home Energy magazine). We’re ...
Energy efficiency is good for the economy, good for families, good for workers, and good for the environment.