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This article originally appeared in Fine Homebuilding Magazine, issue 220, June/July 2011, but its message remains as relevant as ever. While energy codes and testing protocols have evolved over the past decade, the fundamentals of duct leakage—how it affects comfort, safety, and energy performance—have not changed. What follows is a practical look at why duct […]
The International Organization for Standardization (ISO) has published over 25,000 standards, but a select few dominate the global business landscape. Based on the most recent ISO Survey data (which tracks the number of active certificates worldwide), three standards consistently top the list. These “Big Three” are popular not just because they are often contractually required, but because […]
Join the leading community of building science experts Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports from the field. Start free trial Replies Expert Member DCcontrarian | Mar 06, 2026 09:56pm | #1 That doesn’t seem risky at all. In 4a, your basement floor […]
My concern is lead contamination vs plastic contamination in water going through a kitchen faucet. Delta faucets use core and shell construction, so that pex lines run from the valves (my hot and cold are compression fit copper lines) through the body of the metal shell to the tip of the spout. The water only […]
I have some steel stud interior partition walls going in a building (climate zone 4) that has zoned heating/cooling. I would like to handle the insulation properly. There are basically two types of walls: A. Walls that divide conditioned space from conditioned space (might be a moderate discrepancy in temperature based on zoning). B. Walls […]