When thermal breaks should not be used for glass rooflights

We have already demonstrated that the use of thermal breaks within aluminium extrusions can be an effective way of managing heat transfer and cold bridging. However there are occasions where the design of the framework means that including a thermal break can actually reduce performance. The simulation below shows a fixed glass rooflight bonded into an aluminium t-section extrusion. The first design does not include a thermal break but performance is still acceptable due to there being no exposed surface area of the internal section.

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