I have a recollection that there is an optimum level of insulation. Problem is that condensation can occur within the thickness of the insulation - interstitial condensation - if the insulation is too thick/deep.
Ideally there should be a vapour barrier under insulation - polythene - some insulation comes in a wrap, foil on the bottom and "polythene" on top. Foil helps to reflect heat back into dwelling.
It can be calculated, but math was never my strong point.
Again, don't stuff insulation into the eaves, leave the ventilation. Fibreglass should be left fully expanded, stuffing it into places reduces the effectiveness.
Ideally there should be a vapour barrier under insulation - polythene - some insulation comes in a wrap, foil on the bottom and "polythene" on top. Foil helps to reflect heat back into dwelling.
It can be calculated, but math was never my strong point.
Again, don't stuff insulation into the eaves, leave the ventilation. Fibreglass should be left fully expanded, stuffing it into places reduces the effectiveness.