Originally Posted by
Lee Reynolds
Minimum of 150mm kingspan/xtratherm or similar in the roof space preferably with a 50mm gap above between insulation and roof felt. 100mm Kingspan/xtratherm or similar in the eaves walls/dormer cheeks.
and yes they are strict.
Wrong lol...minimum 130mm depending on the "R" Value of the material you are using...
me I would Concider a multi foil insulation 10mm thick, will be more expensive but its easier to use.
Hope this helps
Si
Last edited by D7AKE; Nov 30, 2008 at 10:34 AM.