I would love to hear about how much insulation should be in exterior walls when in building a new house. I happen to think that the rules in Denmark is close to unreasonable.. On a brick wall government demand min 245mm of insulation On a light wall the government demand min 265mm of insulation on the ceiling, the requirement min 450mm insulation in the floor, the requirement min 300mm insulation is it just me that thinks it's a bit insane