Reduce energy loss and condensation risks in commercial buildings by addressing thermal bridging in steel-framed wall assemblies. Learn how to use thermal clips, Z-girts, and CI strategies.
Overview
Thermal bridging occurs when materials that are poor insulators bypass or reduce the effectiveness of wall insulation. In steel-framed construction, framing members conduct heat easily, creating paths for energy loss. This article examines how to mitigate these effects with specific design details and product solutions.
Common Problem Areas
- Continuous steel framing penetrating wall insulation
- Window and door headers and sills
- Roof-to-wall and slab-to-wall transitions
- Structural attachments and anchors
Thermal Break Strategies
- Install continuous exterior insulation (CI) over steel framing
- Use thermally broken clips or brackets for cladding attachment
- Minimize the frequency of thermal bridging materials
- Model and quantify performance using software like THERM or WUFI
Used In These Assemblies
- Steel-framed exterior wall with CI and rainscreen
- High-performance retrofit of existing commercial facades
- New institutional or mixed-use buildings with thermal targets
❓ FAQ
What is the biggest source of thermal bridging?
Steel framing that bypasses insulation layers and directly connects exterior to interior surfaces.
Are thermal clips worth the cost?
Yes, they can significantly reduce energy loss and improve envelope performance in the long term.
Conclusion
Addressing thermal bridging in steel-framed buildings is essential for modern energy codes and comfort. Using continuous insulation and thermally broken attachment systems can yield dramatic improvements in performance and durability.
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