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Thermal Bridge Calculations

We use the latest modelling software to calculate the PSI-Value of the detail (the heat loss) and also the fRsi Value (the potential for condensation and mould growth).

What is Thermal Bridging
Why Calculate Thermal Bridges?


In the UK & Ireland calculating PSI values will result in a more accurate SAP/DEAP rating and can mean the difference between a pass and a fail. Thermal bridging can account for up to 30% of a total buildings heat loss so its massively important to get accurate thermal bridge calculations.

Thermal bridging occurs around openings junctions, or at any point where there is a change in the thermal resistance of the building envelope. The result is increased heat loss, reduced surface temperatures and potential issues with condensation and mould.