A doggie door is great for pet access, but in winter, it can let in cold air, drafts, and even snow. Properly winterizing it helps maintain warmth, reduce energy bills, and keep your home comfortable.

Step 1: Inspect for Drafts and Gaps

• Check around the edges of the dog door for air leaks.
• Feel for cold air coming through gaps.
• Identify areas needing sealing or insulation.

Step 2: Add Weatherstripping

• Apply foam or rubber weatherstripping around the dog door frame.
• This blocks small air leaks and prevents drafts.
• Make sure it doesn’t interfere with the flap movement.

See Also — How to Winterize Single Pane Windows

Step 3: Use an Insulated Dog Door Cover

• Install an insulated panel or cover over the doggie door at night.
• Use a removable, heavy-duty vinyl flap for extra insulation.
• Some brands offer magnetic or self-sealing flaps to improve insulation.

Step 4: Apply Caulk Around the Frame

• Seal any gaps between the dog door and wall with silicone caulk.
• This prevents cold air leaks and keeps heat inside.

Step 5: Install a Draft Stopper or Wind Blocker

• Place a draft guard at the bottom of the door.
• If the dog door faces strong winds, install a wind-blocking shield outside.

Step 6: Consider a Thermal Dog Door Upgrade

• If your current flap is too thin, upgrade to a double or triple-layer insulated pet door.
• Some premium models have magnetic seals and self-closing mechanisms.

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Step 7: Use Temporary DIY Insulation (For Extreme Cold)

• Tape bubble wrap, thick plastic, or a foam board over the dog door when not in use.
• This helps trap heat inside during severe winter conditions.

Conclusion

Winterizing a doggie door is essential to prevent heat loss and cold drafts. By sealing gaps, adding insulation, and using weatherstripping, you can keep your home warm while ensuring your pet still has access.

FAQs

1. Will winterizing affect my dog’s ability to use the door?

No, if done properly! Use insulated flaps that remain flexible in cold weather.

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2. Can I use a blanket to block the dog door at night?

Yes, but an insulated cover or removable panel works better and is more secure.

3. What’s the best material for sealing a doggie door?

Silicone caulk, foam weatherstripping, and insulated flaps provide the best seal.

4. How do I stop snow from coming through the dog door?

Install a wind barrier outside and use a double-flap or magnetic-sealing dog door.

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5. Should I replace my doggie door for winter?

If it’s an old, thin-flap model, upgrading to an energy-efficient insulated dog door is a good investment.