1. Rubber Weather Sealing
You can buy strips of self-stick rubber weather sealing at a hardware store or online. Cut long strips down to fit your window dimensions, then peel and stick to the frame to close any gaps and keep out drafts.
Pros: Cheap, effective, minimal alterations to appearance of windows.
Cons: When you peel away the rubber strips, they can damage paint or leave a sticky residue.
2. Window Insulation Film:
You can buy window insulation kits from a hardware store or online. Kits usually include plastic shrink film that is applied to the indoor window frame with double-stick tape, then heated with a hair dryer to shrink the film and remove any wrinkles.
Pros: Cheap and effective.
Cons: Gives windows a cloudy, shrink-wrapped look.
3. Cellular Shades:
Cellular Shades insulate while still letting in light through the windows. They can be ordered and custom cut from home and design centers.
Pros: They let in light and can be custom-fitted for doors and windows.
Cons: They can be expensive and may not insulate as much as heavier curtains.
4. Layered Curtains or Insulated Curtains:
Use layered curtains over the windows to keep out drafts. Or, purchase insulated curtains with built-in thermal backing.
Pros: Looks good, can be matched to your home decor.
Cons: Curtains can be expensive and heavy drapes can block out light.
5. Draft Snakes:
Draft snakes are fabric tubes placed on a window sill or under a door to prevent cold air from creeping in. You can make one by sewing a tube of fabric to fit the width of your window and filling it with dried rice.
Pros: Cheap, easy to make as a DIY project.
Cons: It only insulates the window sill, not the glass or frame.
Article Source: Apartment Therapy