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What is u-value of the 140mm Rockwool Flexi?
Rockwool Flexi has a thermal conductivity of 0.035 W/mK at 140mm thickness and above. The thermal conductivity can be used in conjunction with other parts of the construction to calculate the U Value. You can use the Rockwool U-value calculator by following this link: https://bim.rockwool.co.uk/u_value/
