Animal Removal & Spark Arrestor Installation San Francisco

A chimney with an open or missing cap is an open door for wildlife across San Francisco. In the Sunset District and the Richmond District, chimney swifts and starlings drop nests into unscreened flues each spring, while raccoons and squirrels favor the taller brick stacks in Pacific Heights, Presidio Heights, and Sea Cliff. The first step is a Level 1 visual inspection under the Chimney Safety Institute of America (CSIA) framework to confirm what is in the flue and where it sits; if the animal or blockage is not visible, a Level 2 inspection using a camera checks the smoke chamber and liner before anyone reaches in to remove the nest.

Decision-fit is straightforward. If a live bird is trapped and reachable near the damper, it is removed by hand and released, and the flue is checked for a second animal. If the nest is abandoned and dry, the sweep will clean out the chimney of twigs, droppings, and loose creosote in the same visit. A nest that has already caught soot or shows scorch marks warrants a full sweep before the fireplace is used again, because nesting material is combustible and sits directly in the path of flue gases. Raccoon activity is the edge case: a mother raccoon with kits inside the flue is not sealed in, since trapping young animals behind a cap creates a decomposition and odor problem inside the chimney. In that situation removal waits until the litter has left, then the cap goes on.

The long-term fix is a spark arrestor with animal screening. A custom, ideally 316 stainless mesh animal spark arrestor resists San Francisco's salt-fog air far better than aluminum or galvanized steel, which corrodes within a few seasons near Ocean Beach, the Marina, and Sea Cliff. The 316 grade is the marine-rated alloy, and mesh openings of roughly 3/4 inch satisfy NFPA 211 spark-arrestor guidance while being too small for raccoons and squirrels to force. A guard fabricated to the exact flue dimensions matters on Bernal Heights and Glen Park homes with unusual or oversized terra-cotta tiles, where a stock big-box cap either rattles loose or leaves a gap that keeps the raccoons out of nothing.

Expect the crew to protect the hearth with drop cloths and vacuum any debris that falls during removal, so a Noe Valley or Cole Valley living room stays clean. Findings are shown in plain language with before and after photos, not a vague 'we cleaned it.' A free on-site estimate confirms the flue count, roof access, and exact cap size before any work is quoted; homeowners are welcome to get some quotes and compare. Phone: (628) 201-5376.