To insulate windows for winter, apply weather stripping around the frame and caulking to fill any gaps. Use window insulation film to create a barrier that keeps cold air out, or install thermal curtains for extra warmth. These simple methods help improve energy efficiency and keep your home warm while lowering heating costs.

Insulating windows during winter with weather stripping, caulking, and insulation film can reduce heat loss and drafts. Adding thermal curtains provides extra insulation. Proper insulation improves comfort and energy efficiency, lowering heating bills throughout the colder months.