Key takeaways
- An open flue invites raccoons, squirrels and birds
- A properly sized cap keeps animals out and lets smoke through
- Clear the flue before using the fireplace
- Capping works best after animals are out
A chimney looks like a hollow tree to a raccoon and a safe nest site to a bird.
Why caps work
A cap with strong mesh blocks animals, keeps rain out and helps stop sparks from escaping.
Choose the right fit
A cap needs to match the size and shape of the flue. Loose caps can blow off or let animals pry them aside.
Check before you light
If you hear scratching or chirping, do not light the fire. Smoke can harm the animal and nest material can block the flue.
Do it in the right order
If an animal is already inside, it needs to be removed first so it is not trapped under a new cap.
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