Xtratherm manufacturers of extra performance Polyisocyanurate (polyiso), is the first new company to enter the rigid foam insulation market
in the UK and Ireland for 20 years.
Xtratherm Thin-R Rigid Insulation boards achieve a thermal conductivity in the range of 0.022
to 0.023. The lambda values and (R) resistance values stated are in accordance with the 90/90 principles as
stated in the harmonised European Standard EN 13165: 2001. U values are calculated in compliance with
BS EN ISO 6946 (Combined method).