Online U-value Calculator

Instant access to calculating your required insulation thickness and product solution.

U-value Calculator
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This professional calculator provides a much-improved service, allowing you to specify your desired U-value before immediately calculating the required insulation thickness and product solution.

In order to access the U-value calculator and download your calcualtion pdfs, you must register for the members area.

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Our U-value calculator app is also available from the App Store.

If you require further help or advice on an already created U-value calculation and would like to speak with an advisor, please contact our Celotex Technical Centre on 01473 820850.

Lines are open Monday – Friday, from 8.00am – 5.15pm.

Please note, some products in the U-value calculator may not be available from stock and subject to minimum order quantities and extended lead times.