Heat flows naturally from higher to lower temperature areas. In the winter, this means heat transfers from your home’s heated living spaces to adjacent unheated attics, garages, and basements as well as any rooms directly adjacent to the outdoors. While in the summer, heat transfers from the warm outdoors to your cooled interior. Sealing a home or commercial building’s air leaks with insulation prevents drafts from windows, doors, attics, and floorboards, providing better indoor temperature control. Good indoor temperature control can have a dramatic effect on household comfort.