insulation simply slows down the rate of heat loss....
but like most things it suffers from diminishing returns. The more you reduce the rate of heat loss, the more other factors become important, such as air leakage, heating efficiency etc.
personally i would see 400mm as the most you should install. and install correctly!!
insulation simply slows down the rate of heat loss....
but like most things it suffers from diminishing returns. The more you reduce the rate of heat loss, the more other factors become important, such as air leakage, heating efficiency etc.
personally i would see 400mm as the most you should install. and install correctly!!