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Contra Costa County • California

Chimney Sweep & Repair in Walnut Creek

Inland heat, heavy wood use and grassland fire risk.

(888) 988-0322

Chimney service built around Walnut Creek homes

Contra Costa homeowners burn more wood than almost anywhere else in the Bay Area. Colder inland winters mean fireplaces and wood stoves see real use here, and heavy use means real creosote.

Rossmoor and older downtown Walnut Creek condos have shared and multi-story flue systems that require coordination with an HOA. Northgate and Saranap single-family homes commonly have wood stove inserts added in the 1980s, many with undersized or missing liners. Homes backing onto Mount Diablo open space need annual arrestor checks.

Hot, dry summers followed by heavy winter use is hard on masonry — expansion cracks the crown, then winter rain gets in and freezes on the coldest nights. Glazed creosote is far more common in Walnut Creek than in coastal cities, and it needs rotary or chemical treatment rather than a simple brushing.

What we do most often in Walnut Creek

  • Glazed creosote removal (rotary and chemical)
  • Wood stove and insert liner installation
  • Grassland fire-zone spark arrestors
  • HOA and multi-unit flue coordination

Walnut Creek chimney questions, answered

What is glazed creosote and why is it dangerous?

It is hardened, tar-like third-stage creosote that a standard brush cannot remove. It is highly flammable and is the fuel behind most chimney fires. We remove it with rotary heads and, when needed, a chemical modifier applied over several burns.

My wood stove was installed decades ago. Is the liner adequate?

Frequently not. Many 1980s inserts were slid into an existing masonry flue with a short connector and no full liner, which allows creosote to collect in the void. A correctly sized stainless liner running to the top solves the draft and safety issues at once.

How often should I sweep if I burn every week in winter?

At least once a year, and mid-season if you burn softwood or damp wood. Regular users in Walnut Creek often benefit from a fall sweep plus a quick January camera check.

Do you serve Danville, Lafayette, Orinda and Alamo?

Yes, the whole Highway 24 and 680 corridor through Contra Costa County, including Moraga, Pleasant Hill and Concord.