I'm currently cleaning out an old loft of rubble in order to properly insulate the space. The rafters extend quite a way down below the loft floor, forming sloping ceilings in the bedrooms (see pics). Should I push insulation as far down into the voids between the rafters as I am able or do I need to consider ventilation?
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Hi berimitsu, Yes Celotex will work but a 1.2x2.4 sheet 50mm thick will cost around £26, the same sheet in EP will cost around £17. What you are doing is a compromise because you will never get a good fit sliding insulation panels down into place so is the extra expense worthwhile? Your choice. Regards S