Professional Chimney Sweeping in Woodland Hills

A couple on a quiet street off Tujunga Village called us last winter after noticing black staining on the brick surround of their fireplace. They'd converted from wood-burning to gas logs about six years ago and assumed the flue no longer needed attention. The staining worried them. They also mentioned a faint smell when the gas logs ran for more than an hour, something acrid that didn't smell like natural gas. Their concern was reasonable: the original masonry firebox was built in the late 1950s when most of the Ventura Boulevard flats and surrounding blocks went up as single-story ranch homes. That old firebox was designed for wood fires, not a gas log set, and nobody had swept or inspected the flue since the conversion.

This scenario comes up often in Studio City. Homeowners convert to gas logs and stop thinking about the chimney. But the flue still collects residue. In this case, years of wood burning before the conversion had left 2nd-degree creosote clinging to the clay tile liner. The gas flames heated that old creosote layer enough to produce the smell but never hot enough to burn it off. Meanwhile, the damper was rusted partially open from disuse, pulling humid San Fernando Valley air through the flue and accelerating mortar deterioration. They needed a proper sweep before anything else. We scheduled the visit for that same week. If your chimney has a similar history, you can check our <a href='/areas'>Studio City service area page</a> to confirm we cover your neighborhood.

Our technician started with a Level 1 visual inspection per NFPA 211 standards, then moved to a camera scan once the creosote deposits were visible above the smoke shelf. The flue had a continuous layer of 2nd-degree creosote from the damper up to the crown, with pockets of 3rd-degree glaze near the first bend. That glazed creosote is the dangerous kind. It's hardened, shiny, and difficult to remove with standard brushes. We used rotary chain-whip tools to break the glaze loose before completing the mechanical sweep. The entire process took about ninety minutes. For homes along the Moorpark Street corridor and throughout the Ventura Boulevard flats, this pattern of old creosote hiding behind a gas log conversion is common enough that we recommend a <a href='/services/chimney-inspection'>chimney inspection</a> before or shortly after any fuel-type switch.

After the sweep, we documented the flue condition with photos and noted two cracked liner tiles near the roofline. Cracked tiles are typical in 1950s Studio City masonry chimneys that have gone through decades of thermal cycling and a few good earthquakes. We recommended a Level 2 inspection to evaluate whether the liner needed repair before the gas logs went back into service. The homeowner had the flue relined with a stainless steel insert the following month. That's the right sequence: sweep first, then inspect, then fix. If you want to understand what a sweep involves start to finish, this resource from CSIA covers the process clearly.