How to choose a chimney cap that lasts
A $25 galvanized cap rusts through in 5 years near the coast. A $250 stainless cap lasts the life of the chimney.
What you'll learn
- The four cap materials (galvanized, painted, stainless, copper) and their real lifespans
- Why CalFire requires spark-arrester mesh in most of inland San Diego County
- How to size a single-flue cap (measure the flue, add 1" clearance)
- When you need a multi-flue cap or a chase cover instead
Step by step
- Measure the outside dimensions of the flue tile (or chase opening).
- Decide on material, stainless is the right default in San Diego.
- Verify the mesh is 12-gauge or heavier with 3/8"–1/2" openings (CalFire spec).
- Confirm the cap fits the crown profile, flush mount or band style.
- For multi-flue chimneys, plan one cap per flue OR a single multi-flue cap.
Safety note
In any High or Very High Fire Severity Zone, most of inland San Diego County, spark arrester mesh is mandatory. Insurance carriers may require proof.
Rather have a pro handle it?
Chimney sweep, inspection, and repair across San Diego County. A real sweep picks up.
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