Wasps in the Fireplace: Chimney Flue vs. Vent Solutions

Wasps entering the house when you light a fire likely nest in the chimney flue, not the gas vent (heat would kill them there). They enter through cracks in the chimney structure.

Action Plan

1. Wait until summer when wasps are active to locate entry points.
2. Hire a chimney sweep to inspect and seal cracks.
3. Install a chimney cap with fine mesh screen.
4. Do not spray insecticide up the flue—fire hazard and fumes.

Professional chimney service is the safest, most effective solution.

A chimney cap with mesh prevents wasp entry.