GET STARTED

Please choose your SAP version:

Choose your Xtratherm insulation and thickness:

To calculate your Y-Value
please enter your building's
Total Envelope (Heat Loss) Area:

Select your Block Type...

To calculate the Y-value for your building, fill out the measurements of each area in meters. For each walls, roofs, floors and opening, a range of junctions are available of which the lengths can be added. Select an area to complete:

The Inputs have been pre-filled with values from a typical semi-detached Part L House.

Once all 4 area’s (walls, roofs, floors & openings) have been completed, you will be able to calculate the Y-value and receive the report and ACD’s by email.

Calculate

Walls

Enter the lengths (mm) of each junction. When you’re done, simply click to proceed to the next building area:

JunctionLength

Roofs

Enter the lengths (mm) of each junction. When you’re done, simply click to proceed to the next building area:

JunctionLength

Floors

Enter the lengths (mm) of each junction. When you’re done, simply click to proceed to the next building area:

JunctionLength

Openings

Enter the lengths (mm) of each junction. When you’re done, simply click to proceed to the next building area:

JunctionLength

Your Results

Select a result to see more details:

Y-VALUE

0.00

Y-VALUE

0.00

Y-VALUE

0.00

Request Certificates

Fill in your information to recieve Xtratherm certificates and insulation specification for your project:

* Required Fields

Thank You!
Your Xtratherm details will be sent
shortly via email. Should you have a problem
or require any further assistance.

+44 (0)371 222 1033
info@xtratherm.com