Estimating how much insulation you need can be rather complicated. It depends on the R value you need for your climate, whether or not you have existing insulation or are starting from zero, and what kind of insulation you're buying and where it's going. But it all starts with square footage. Whether you're thinking about insulating walls, ceilings, or floors, the first key measurement is what area you need to cover.


Round up to the nearest foot on these measurements.