30% of heat is escaping through windows and doors. Why? Outlets and light switches in the walls that separate your home from the outdoors are often overlooked sources of heating or cooling loss. Foam weatherstripping works by creating a barrier against drafts through doors and windows. For installation, all you need are some scissors. Insulating these areas can reduce drafts and keep your home more comfortable. Save up to $10 per year when you insulate 5 gaskets/outlets.