Define properly insulated? When my house was built it has 1 inch of loft insulation. Now as far as I can tell there weren't condensation problems, but that wou

Define properly insulated? When my house was built it has 1 inch of loft insulation. Now as far as I can tell there weren't condensation problems, but that wouldn't have been enough to keep the house warm through winter so you would still need extra heat/clothes/both. I do for the record now have over a foot of insulation in the loft and still require extra heating, and I put a jumper on.