You can make a request for a U-value calculation by describing
the construction layers on this form and clicking the submit button. The cost
of the calculation is £20.00. You will be invoiced for this amount and the
calculation will be sent on receipt of payment.
The calculation will be done in accordance with BS EN ISO 6946 using Dewpoint program.
You can go off-line to complete these details, or you may wish to print this form and send details with payment by post.