How to Check Your Windows and Doors for Drafts Before Winter

Don’t let the chill in!

Fall is here and so is the chill in the air! Don’t let that chilly breeze sneak in through your windows or doors. Drafty windows and doors not only make your home uncomfortable, they also send your heating bill soaring. Luckily, with a little time and a few simple tools, you can inspect and seal your windows and doors to keep your home warm and cozy all winter long.

Here’s how to do it.

Check for Drafts and Damage

Start by looking closely at each window and exterior door and check for anything that might let air leak through.

Look for:

  • Cracks or gaps in the frame or trim
  • Peeling paint or soft, rotting wood (especially on older windows)
  • Drafts around the edges or corners
  • Windows that don’t close tightly or doors that don’t latch snugly. Wood windows are especially prone to warping in our dry climate, so check carefully. 

Quick test: On a breezy day, light a candle or incense stick and slowly move it around the edges of your window or door. If the flame flickers or smoke moves, air is coming in.

If you find major issues like cracked glass, warped frames, or serious rot, you may need to call in a pro. But for small gaps and worn seals, you can easily fix those yourself.

Check the Weatherstripping

Weatherstripping is that flexible rubber or foam material that seals the space between the door or window and the frame. Over time, it gets worn down, cracked, or flattened which means cold air can slip right through. You’ll need to open your windows and doors and look at your weatherstripping to see if it needs to be replaced. Don’t forget to look at the top of the door or window. It should have some puffiness to it, to fill the gap. If it’s flat or cracked, it’s time to replace it. 

Here’s how to replace it:

  1. Remove the old strip. Gently peel it off and clean away any leftover adhesive or debris.
  2. Clean the area. Use soap and water or rubbing alcohol, and let it dry completely.
  3. Cut new weatherstripping to size. You can find it at any hardware store in either foam, rubber, or vinyl.
  4. Stick it on. Apply the new strip evenly along the frame, pressing firmly to make sure it sticks.
  5. Close your window or door a few times to make sure it seals snugly without making it hard to open or close.

Seal Up the Gaps

Even with fresh weatherstripping, small cracks around window and door frames can still let cold air in. That’s where caulk comes in handy.

What to do:

  • Use exterior caulk for outdoor gaps (like where siding meets the window frame).
  • Use interior caulk for inside cracks around trim or molding.
  • Smooth the bead with your finger or a caulking tool for a clean finish.

Tip: Add a door sweep to the bottom of exterior doors to block drafts, they’re inexpensive, easy to install, and make a big difference.

Add a Little Extra Insulation

If your windows still feel cold after sealing, try one of these simple upgrades:

  • Thermal curtains
  • Draft stoppers
  • Storm doors

These extra touches can make your home feel instantly warmer.

Stay Warm and Save Energy

Taking an afternoon to inspect and seal your windows and doors is one of the easiest ways to prepare your home for winter. You’ll notice fewer drafts, a cozier living space, and maybe even a lower heating bill.

So grab your weatherstripping and caulk gun, put on some comfy clothes, and get your home winter-ready. You’ll thank yourself!