What a cap does
- Keeps rain out. An open flue lets rain fall straight onto the damper and smoke shelf, where it rusts metal and wears down mortar.
- Keeps animals out. Birds, squirrels and raccoons all look for an open flue. Mesh sides stop them.
- Catches sparks. The mesh stops embers from landing on the roof or the yard.
- Reduces downdraft. A cap helps stop wind from pushing smoke back into the room.
Types we install
| Cap | Fits | Notes |
|---|---|---|
| Single-flue stainless | One clay or metal flue | Most common. Sized to the flue tile |
| Multi-flue or full-width | Chimneys with two or more flues | Covers the whole crown and helps protect it from weather |
| Prefab termination cap | Factory-built fireplaces | Must match the manufacturer's listed system |
| Top-sealing damper cap | Chimneys with a failed throat damper | Cap and damper in one. See dampers |
After a hailstorm
Hail crushes mesh and bends lids, and a damaged cap stops doing its job without anyone noticing. If you've had a storm, ask us to check the cap with the rest of the chimney. See hail damage.
Every repair is priced in writing before any work starts, and repair estimates are free.
Questions about chimney caps
How much does a chimney cap cost?
Cost guides put installed caps at about $200–$850, with custom and multi-flue caps at the higher end. See the Dallas price guide.
Do I need a cap on a gas fireplace?
Yes. Gas flues still need protection from rain and animals, and a blocked gas vent can push carbon monoxide into the house.
Stainless or galvanized?
Stainless. Galvanized caps rust within a few years, and rust stains run down the chimney. A good stainless cap lasts far longer.