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Why does the U-value matter?
A U-value is how much heat transfers/ is lost through a material/installation. The U-Value is measured in W/m² K and it is important that this number is as low as possible.
The less heat that can travel through, the better the thermal performance will be. You can find out the U-value by visiting the Celotex website directly at www.insulation-uk.com or calling their technical line on 01473 820850.
