Frequently asked question

How do you calculate thermal performance?

To compare the thermal performance of a wall or roof etc this is normally calculated via the use of U Values. Please see our online thermal calculation tool. By simply clicking on a series of icons and drop down menus the tool allows you to quickly and easily select the structural element for your project (e.g. roof, wall or floor), then the construction type (timber, steel or masonry), then finally enter the specific dimensions etc. You can either specify the products you wish to use for the upgrade or enter the U value that needs to be achieved and the tool gives you the recommended solution. Simply add the project details to finish off and you can print off your completed calculations to use immediately.

If you need to compare the thermal performance of materials this is done using the thermal resistance (R) value. These can be found for our board products in WHITE BOOK Chapter 10 Section 03 Page 02.

Determining the performance of a complete building will require the use of thermal modelling software such as SAP 2012 or SBEM.

Further information about thermal performance can be found in WHITE BOOK Chapter 02 Section 01 Page 40.