934Improving the Performance of Envelope Components with Metal Elements

The impact of metal elements can be mitigated by:

1. Installing the insulation outside of the layer containing metal studs.

2. Installing interior and exterior finished materials on horizontal "hat" sections, rather than directly on the studs themselves.

3. Using expanded channel (thermally improved) metal studs.

4. Using non-conductive thermal breaks at least 0.40 to 0.50 inches thick between the metal element and the inside and outside sheathing. The value of the thermal break conductivity should be at least a factor of 10 less than the metal element in the envelope component.

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