Our U-Value calculator is a free, online tool which will help calculate the required thickness of insulation to achieve the desired U-Value.
The calculator can be used to calculate U-Values for floor, wall, pitched roof and flat roof insulation applications.
There is a wide range of calculations available in the U-Value calculator which can be emailed directly to your inbox.
To complete your U-Value calculation, you will need to have the following information:
A U-Value is a measure of the heat loss through a building element. Otherwise known as thermal transmittance, it’s the rate at which heat transfers through a building element and is expressed as W/m 2K.
U-Values are used in construction to measure the effectiveness of the building’s envelope in preventing heat loss. Elements with lower U-values lose less heat. Building Regulations set a maximum permitted U-value for each element which must be matched or improved upon.
Calculating U-Values can be a complex process, so as well as our U-Value calculator, we have provided a number of U-Value calculations for our insulation products, which can be found on our Insulation Applications pages. Using our U-Value calculator will also allow you to calculate the U-Values for your specific construction project quickly and easily.
Use our U-Value calculator to work out the required thickness of insulation for the application. You can adjust the insulation thickness in the calculation to achieve the required U-Value. We have also created U-Value tables for different floor insulation, wall insulation and roof insulation applications, which can be found on each of the different applications pages. The tables provide the U-Values for a range of insulation thicknesses for each application.