on how to measure the area correctly to ensure all things are taken into consideration such as basemolding, windows,electrical outlets, attic and floor crawl spaces, heat registersetc..on how to measure the area correctly to ensure all things are taken into consideration such as base molding, windows, electrical outlets, attic and floor crawl spaces, heat registers etc.. on how to measure the area correctly to ensure all things are taken into consideration such as base molding, windows, electrical outlets, attic and floor crawl spaces, heat registers etc..