The following is a checklist by Homeadvisor.com to help you as you prepare your home for the winter months.

Be prepared

  • Buy a snow shovel now so you’ll have it before winter weather hits.
  • Keep extra water and canned food in storage just in case of a heavy snowstorm.

Gutters & downspouts

  • Clean gutters and downspouts in mid-fall and double-check them before winter.
  • Install leaf guards to keep falling leaves and other debris out of cleared gutters.

Doors & windows

  • Examine doors and windows for gaps where warm air can escape.
  • Caulk or apply weatherstripping around problem draft areas.
  • Install double-paned windows to increase energy efficiency.

Heating system

  • Replace the filter in your furnace.
  • Give your heating system a test run so you know it will work properly when you need it.
  • Hire a heating/cooling expert to check your furnace’s efficiency.

Roofing, chimneys & decks

  • Have a contractor look for damaged roof shingles and loose gutters.
  • Make sure chimneys and woodstoves are cleaned early in the season.
  • Give your deck a fresh coat of sealer to protect it from the winter elements.

Source: https://www.homeadvisor.com/r/home-winterization-checklist/