Fireplace Inserts in Rancho Palos Verdes: Written Report, Licensed Technicians

Last fall, a homeowner on the Crest Road area called us in mid-October. She'd been burning wood in her 1970s-era masonry fireplace about a dozen times each winter, mostly on cool evenings when the marine layer settled in. She wanted to upgrade to a gas insert before the holidays but wasn't sure whether she needed a chimney sweep first or if the insert installation would make that unnecessary. Her flue had not been cleaned in three seasons. She could see dark, flaky deposits on the damper when she opened it. Her concern was reasonable: schedule the sweep now, install the insert in November, or combine the two somehow. This is one of the most common timing questions we get from Rancho Palos Verdes homeowners between September and December.

Her situation is not unusual along the Rolling Hills border, where many homes share the same mid-century construction and single-flue masonry chimneys. These fireplaces were built for open wood burning, and years of light but consistent use leave behind 2nd-degree creosote, the flaky, tar-like buildup that clings to terracotta liner tiles. If you skip the sweep and install an insert directly into a dirty flue, you trap those deposits behind a sealed unit. That creosote does not disappear on its own. It becomes a long-term fire hazard hidden where no one can see it. The right sequence matters, and getting the timing wrong can cost you a second service call or, worse, compromise the safety of your new insert from day one. If your current fireplace needs structural updates before an insert goes in, a <a href='/services/fireplace-remodel'>fireplace remodel</a> may also be part of the conversation.

We scheduled a CSIA-certified Level 2 inspection for her chimney, which includes a camera scan of the full flue interior. NFPA 211 requires this level of inspection any time you change the type of appliance connected to a chimney, and switching from an open fireplace to a gas or wood insert qualifies. The camera revealed two things: moderate 2nd-degree creosote throughout the upper third of the flue and a hairline crack in one liner tile about four feet above the smoke shelf. Neither issue was catastrophic, but both had to be addressed before any insert could go in safely. We swept the flue, removed the creosote buildup, and recommended a stainless steel liner sized to match the BTU output of the gas insert she'd chosen. Along Palos Verdes Drive North, we see similar conditions in homes built during the same era.

Liner sizing is not a one-size-fits-all decision. A wood insert rated at 70,000 BTUs needs a different diameter liner than a 40,000 BTU gas unit. If you're considering a wood-burning insert, it must carry EPA certification to meet current emissions standards. You can verify approved models through the EPA's list of <a href='https://www.epa.gov/burnwise/epa-certified-wood-stoves'>EPA certified wood stoves and fireplace inserts</a>. We completed her gas insert installation the second week of November, liner included, with a full <a href='/services/chimney-inspection'>chimney inspection</a> report she can keep for resale documentation. The lesson here is simple: get the sweep and inspection done in September or October. If you wait until December, you're competing with every other homeowner on the peninsula who had the same idea two months too late.