Chimney cap missing or damaged

Symptoms

• No visible cap or cover on top of the chimney
• Rusted, bent, or partially detached cap
• Water stains inside the fireplace or flue, or animal noises from the chimney

Likely causes

• CommonRust and age causing the cap to deteriorateChimney caps are exposed to weather constantly and typically need replacement every 10–20 years.
• CommonWind or storm damage dislodging the capHigh winds can bend, loosen, or blow off a poorly secured cap.
• PossibleCap never installed originallySome older chimneys were built without a cap at all.

What to do

1. Look at the chimney top from the ground with binoculars, or safely from a nearby window or roof access if available, to confirm the cap's condition.
2. Check inside the fireplace or flue (with the damper closed to keep debris out of the room) for signs of water, debris, or animal nesting.
3. Measure the flue's outer dimensions if you plan to buy a replacement cap yourself, since sizes vary.
4. Install a new stainless steel or copper multi-flue cap sized to fit securely over the flue tile.
5. Have any animal nest or blockage professionally removed before capping, so nothing is sealed inside.
6. Consider a spark arrestor screen if you use a wood-burning fireplace, which many caps include.
7. Schedule a chimney sweep and inspection at the same time if it hasn't been done recently.

Tools and parts

• Ladder (roof access with caution)
• Tape measure
• Screwdriver/drill

When to call a pro

Call a chimney sweep or mason to install a cap and inspect the flue, especially if animals or heavy debris are found inside.

Safety