10 Easy Ways to Save Money & Energy in Your Home
8. Insulate windows and doors.
About one-third of the home's total heat loss usually occurs through windows and doors. The following are ways to reduce energy lost through windows and doors:
Seal all window edges and cracks with rope caulk. This is the cheapest and simplest option.
Windows can be weatherstripped with a special lining that is inserted between the window and the frame. For doors, apply weatherstripping around the whole perimeter to ensure a tight seal when they're closed. Install quality door sweeps on the bottom of the doors, if they aren't already in place.
Install storm windows at windows with only single panes. A removable glass frame can be installed over an existing window.
If existing windows have rotted or damaged wood, cracked glass, missing putty, poorly fitting sashes, or locks that don't work, they should be repaired or replaced