Thermal Calculation tool (u-value)

Helping you meet your thermal performance requirements using our products.

Please read the terms of use before using this Thermal Calculator. If you need a more specific U-value calculation, please complete our Thermal calculation request form to provide all required information.

Click here to access the u-value calculator

Please be aware any ‘U’ Value’s for Isover products, should be sent to the following e-mail address:

We recommend you use Chrome to get the best results from our U-Value tool.