TechnicalUp to date · Jan 15, 2026
Thermal Bridging
Heat transfer through building elements (like studs, concrete slabs, or window frames) that are more conductive than the surrounding insulation, creating "bridges" for heat to escape.
Why It Matters
Framing lumber in walls conducts heat 3-4× faster than insulation. In a typical wood-frame wall, thermal bridging through studs can reduce the wall's effective R-value by 20-30%.
Related Topics
Related Terms
R-Value
A measure of thermal resistance — how well a material resists heat flow. Higher R-values mean better insulation. Recommended attic R-values range from R-38 to R-60 depending on climate zone.
Air Sealing
The process of identifying and sealing unintentional air leaks in a building envelope — including gaps around pipes, wires, ducts, windows, and the attic hatch.