Contact – U-value calculator

U-value calculator is intended for bespoke wooden framed windows and doors. Ours is a whole window calculator that takes into account the type of wood used in the frame the thickness, the type of glass and the spacer.

    We have also carried out calculations for doors without glass and for windows and doors whose frame is made from something other than wood. Please contact us for further information about our services.

    Contact us by using the contact page on this page or by emailing us at

    Please note we do not provide a telephone service but will answer any enquiries submitted using the contact methods here specified.