Every wood fire sends more than smoke up the flue — it sends sparks and embers too, carried on the draft right out the top of the chimney. Most of the time they cool and scatter harmlessly, but during a dry stretch, or if your roof or the yard nearby is covered in dry leaves and mulch, a stray ember landing in the wrong spot is exactly how house fires start. A spark arrestor is the simple piece of hardware that stops that from happening in the first place.
A spark arrestor is a fine metal mesh screen, most often built into the top of a chimney cap, that catches embers before they clear the flue while still letting smoke draft normally. It's a small addition with an outsized safety payoff, and it's one we recommend readily for homes throughout Nashville's leafier neighborhoods and anywhere near wooded lots in Middle Tennessee, where dry leaves and pine straw collect on roofs every fall.
What's Included
- On-site assessment. A look at your current cap, fuel type, and appliance to confirm what mesh spacing and setup fits.
- Fine mesh screening. Stainless steel mesh sized to stop embers while keeping the flue drafting properly.
- Combined with a cap when needed. Often installed as part of a single mesh spark-arrestor cap for weather, animal, and ember protection together.
- Code & manufacturer check. Confirming whether your appliance or jurisdiction specifically calls for a spark arrestor.
Fire Safety Starts With What's Building Up Inside
A spark arrestor handles embers on the way out, but the size and frequency of those embers has a lot to do with what's happening inside the flue. Heavy creosote buildup burns hotter and throws more sparks, which is one more reason routine sweeping matters alongside any hardware upgrade. If you haven't had your flue swept recently, it's worth reading up on why that buildup is a real fire risk before your next burn.
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FAQs
A spark arrestor is a fine mesh screen, usually built into the top of a chimney cap, that catches embers and sparks carried up the flue by the draft before they can escape into the air. Without one, hot embers can land on a roof, gutters full of leaves, or dry grass and mulch nearby — any of which can start a fire.
Not exactly. A standard cap keeps out rain and animals but doesn't necessarily screen the top opening tightly enough to stop embers. A spark arrestor adds that fine mesh screening across the top. Most of our customers combine the two into a single mesh spark-arrestor cap, which handles weather, animals, and ember control in one piece of hardware.
Requirements vary by jurisdiction, appliance type, and manufacturer specifications, and some wood-burning inserts and fireplace models call for one specifically. We'll check what applies to your setup and let you know plainly whether it's required or simply a smart safety upgrade for your property.