U-values & Psi-Values

U-value calculator

Whether you need information on the new Part L U-values, an update on how Psi-value calculations are changing, or a U-value calculator for your project, we’ve got you covered. 

Here you’ll find Q&As on the Part L U-value requirements, as well as advice on how to meet them using products from our DriTherm® Cavity Slab and Supafil® ranges. You can also use our free Psi-value calculator and U-value calculator. Click the tiles below to get started.

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