Thermal Bridging Calculator
Effective R-value accounting for framing factor.
Inputs
Results
Effective whole-wall R-value
10.16
Thermal bridging penalty
20.9%
R-value (cavity path)12.85
R-value (framing path)6.24
U-factor (effective)0.1
Heat loss per 1000 sq ft4,921 BTU/hr
Extra heat loss from bridging1,030 BTU/hr
How to Use This Calculator
- Enter Framing type, 2×4 wood @ 16, and 2×4 wood @ 24.
- Set 2×6 wood @ 16, 2×6 wood @ 24, and Steel stud 3.5.
- Adjust Steel stud 5.5, Cavity insulation as needed.
- Review Effective whole-wall R-value and Thermal bridging penalty (%).
- Use R-value (cavity path) and R-value (framing path) to inform your decision.
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