By the LGS FrameX Team · Updated October 2026
Steel is a better conductor of heat than wood, so steel studs can create thermal bridges through a wall. Good design handles this, and it is a normal part of steel-frame energy compliance.
What is thermal bridging?
A thermal bridge is a path where heat bypasses insulation. Steel studs and track cross the insulated cavity, so cavity insulation alone delivers less effective R-value than its label suggests.
Continuous insulation
The most common fix is a layer of continuous insulation on the exterior side of the studs, which covers the framing and breaks the thermal path. Energy codes often tabulate required R-values for steel-framed walls with and without continuous insulation.
Cavity insulation and air sealing
Fill the cavity with batt or spray foam insulation, and seal air leaks at plates, penetrations and openings. A continuous air barrier matters as much as R-value.
Moisture and humid climates
With exterior insulation, plan the dew-point location and vapor control for your climate zone. See our moisture article.
Check with your designer
Your architect or energy consultant should confirm the wall assembly for your climate zone and code edition.
Frequently asked questions
Are steel-framed walls less energy efficient?
Not if designed correctly. Continuous insulation and air sealing give steel-framed walls the same compliance as other wall types.
Is continuous insulation required?
Often, depending on your climate zone and code edition. Check the energy code or your designer.
Related guides
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