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Why do I need to check the R-value of the board?
The R-value of a board is important as it meaures the thermal resistance. Unlike the U-value, the higher the figure the better the thermal resistance.
The figure can change depending on the thickness or density of the board and where you are installing it. The best option is to find a board with a high R-value and a low U-value. You can find out the R-value and U-value by visiting the Celotex website directly at www.insulation-uk.com or calling their technical line on 01473 820850.
