The following links will take you to helpful U-value and quantity calculators, some of which require membership of the specific site:-
If you are unsure or need any extra advice, please feel free to email or call us on 01509 649065

• Celotex U-value Calculator (Celotex Site Membership required)
• British Gypsum U-value Calculator
• British Gypsum Site Book Quantities

Please note that these links are to third party websites and we can take no responsibility for their content