U Value Calculator
Colour Picker
Find an Installer
Contact Us


To put it simply, U-Value is the measure of the rate of heat loss through a material.

Therefore, in all aspects of home design one should be aiming for the lowest U-Values possible, because the lower the U value – the less heat is needlessly escaping.

The calculation of U-Values can be rather complex – as it is measured as the amount of heat lost through a one square meter of the material for every degree difference in temperature either side of the material.

U-Value Calculations

Wetherby offer FREE U-Value Calculations for both Internal and External Wall applications.

Please fill out the enquiry for below and we will get back to you!

Contact Information

Construction Details

Location Thickness Description
Location 2
Location 3
Location 4
Location 5

U Value Required


Preferred Insulation Type

Stone WoolEnhanced EPSStandard EPSHigh Density EPSPhenolic

Please fill out the fields below, your download will automatically start. Your download will also be available via email in case it doesn't automatically start.