Attic, Insulation, Ventilation and Interior | US Home Inspector Training

Insulation is your primary defense against heat loss. If your attic is poorly insulated, you could save up to 25 percent of your heating costs by insulating. That’s why, when it comes
to adding insulating materials, it’s a good idea to start at the top and work your way down.You may have to lift the boards to put batts in place or make holes in the floor.