wool /foil/fibtreglassim lost what would be the best as in cooler at summer and warmer in winter
Fiberglass is the best. You can either go with batts or loose fill, which is blown in. 14 of loose fill gives you R-38, as does 13 of batts. Hope this helps.
fiberglass for sure. Foil-faced batt insulation is often used in cathedral ceilings because it has a 0.5 perm rating, providing the permeability rating often required for use in ceilings without attic spaces. A vent baffle should be installed between the insulation and the roof decking to maintain the ventilation channel.
