To keep cold air from coming through windows, apply weather stripping to the edges of the window frame and use caulking to seal gaps. Install window insulation film to create a barrier against drafts, and consider using thermal curtains for added insulation. These DIY methods are cost-effective and easy to implement.

Prevent cold air from coming through windows by sealing gaps with weather stripping and caulking. Installing window film and using thermal curtains provide extra insulation, making your home warmer and more energy-efficient during the winter months.