On the other hand if you are planning on using your loft space then you should probably opt for a warm pitched roof construction where the insulation is placed over under or between the roof rafters.
Pitched roof internal insulation.
This means that you will cut off the interior from the roof space which will remain unheated.
λ 0 037 to 0 040 w m c excellent thermal lag excellent soundproofing compression resistance at 10.
Thermal and acoustic insulation of pitched roofs with expanded insulation corkboard between rafters.
110 to 120 kg m3 thermal conductivity.
Pitched roof with internal insulation between rafters solution description.
Insulating a sloping roof it s worth insulating the sloping insides of a pitched roof in order to conserve heat if the space is to be used for anything except simple storage.