Where should my Structural Thermal Break be placed?

The placement of structural thermal breaks can significantly impact their effectiveness. Here are some key considerations to keep in mind:

1. Alignment with insulation matters: To be most effective, the thermal break should ideally be positioned within the insulation layer. Specifically, the outside edge of the thermal break should be aligned with the outside edge of the insulation. This is the same principle as aligning your glazing IGU with your insulation layer; we want isotherms running through the different materials to align to minimise geometric thermal bridging. Keep the warm part in, and the cold part out. 

2. Orientation Matters: The thermal break should be parallel with the insulation layer to most effectively interrupt conductive heat flow. For example, bolted end-plates are more effective than side cleats.

3. Consider detailing early: Engage with your structural engineer early in the detailing to ensure that thermal performance is aligned with structural requirements. The way they design connections and supports should be considered to maximise the benefit of structural thermal breaks. The cost of design changes to a project increases exponentially as a project progresses so getting detailing sorted earlier means incorporating best practice stays within budget and avoids the dreaded value engineering.

   
   

Optimised placement of structural thermal breaks can lead to better energy performance, minimised risk of condensation and mould growth, reduced operational costs, and enhanced occupant comfort. 

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