Chimney sweeping and cleaning in Longmont.

1. What comes out of the flue.

   Every fire leaves a thin coat on the walls of the flue. New soot is dry and brushes off easily. After many cool, slow burns it becomes a sticky tar, and in the end a hard glassy skin that resists even a stiff brush.

   The work goes top down from the damper: flue walls, then the smoke shelf, then the firebox floor. Whatever comes loose is collected and carried away, so none of it stays behind to feed a later blaze.

   

2. How often is often enough?

   Burning habits decide it. A hearth used every night coats the flue far sooner than one used a handful of times, and once the coating turns thick or glossy, the sweep should come next.

   NFPA 211 recommends looking the chimney over once a year. That look measures the deposit, which is why a sweep and an inspection are so often booked as a single visit.

   For scale, the Census Bureau counts 31,403 of Longmont's 42,155 occupied homes as heated mainly by utility gas and 68 by wood (American Community Survey, 2020 to 2024, with a margin of 49 on the wood figure). Even an occasional fireplace builds some deposit, so the annual look still comes first.

3. What a clean flue buys you.

   A chimney fire begins when built-up creosote catches inside a passage meant for smoke. Take the deposit out and a stray spark finds nothing to hold on to.

   A clean flue also pulls better. Smoke rises out of the house, rather than backing into the room as soon as you open the damper.

   

4. Stoves and inserts.

   Closing a stove down for the night keeps it burning cool, and cool smoke deposits creosote quickest, most of all in the connector pipe that joins the stove to the chimney.

   On a stove visit we follow the whole route: the connector and its joints first, then the flue or liner, then the cap.

5. Right at the top.

   Smoke is at its coolest when it reaches the cap, and that is where soot likes to stick. A mesh that clogs weakens the draft, but the same mesh is what keeps embers in, so we clean it on every sweep.

   

6. Odor on warm, muggy days.

   The smell traces back to creosote. Every flue that has been used holds a trace, and heavy, humid air or a draft running backward carries it down into the house. A sweep takes the source away; a shut damper and a cap hold in whatever remains.

Arrange a sweep