News Article

U-Value Calculations

U Value Calculations

At Isothane we are able to provide u-value calculations as part of the technical support we offer our new, existing and potential customers.

what IS A u-value?

U-values measure how effective a material is an insulator. The lower the U-value is, the better the material is as a heat insulator. Polyurethane products are well known for their increased thermal efficiency which results in lower u-values. Installing our cavity wall insulation product, Technitherm® and using our spray foam product, Duratherm®, which both have a low thermal conductivity value of 0.025 W/mK, means you can achieve lower u-values. 


We are able to provide contractors, architects, specifiers and homeowners u-value calculations for their projects when using our products. Our calculations take into account fixings used, bridging factors (where appropriate). This means you can be confident that the calculation you get is correct for the building you have supplied. The team are always on hand to discuss this with you before you submit your u-value request. Our U-value calculations can take into consideration the condensation risk analysis if you require this information. Further information on condensation risk can be found here.

If you would like to request a u-value calculation, please download the following form and email it to

U-Value Request Form


Newhouse Road,
Huncoat Industrial Estate,

General Enquiries

Tel: +44 (0)1254 872555Email:

Sales Enquiries

Tel: +44 (0)1254 872555Email:

Technical Enquiries

Tel: +44 (0)1254 872555Email:

Prepolymers & Export Enquiries

Tel: +44 (0)1254 872555Email:


Enter your email to receive latest newsletters and industry updates

This website uses Cookies to improve your browsing experience. View Cookies Policy

I'm fine with this