The Chimney Finding That Shows Up Most Often in Pasadena Escrow Inspections

The Finding Inspectors Flag Most Often

Among everything a chimney inspection can uncover during a home sale, one finding shows up more consistently than any other: creosote buildup somewhere inside the flue. It is not usually a deal-breaker on its own, but it is the item most likely to appear on a Level 2 report regardless of the home's age, price point, or neighborhood, which makes it worth understanding well before you are staring at a report during a tight contingency window.

This guide walks through what creosote is, why it turns up in nearly every escrow inspection, and how buyers and sellers in Pasadena typically resolve it once it appears.

What the Camera Actually Sees Inside the Flue

During a Level 2 inspection, a specialized camera travels the length of the flue and records the interior surfaces in detail. Where a Level 1 visual check might only reveal what is visible from the firebox with a flashlight, the camera captures the full picture: a dark, tar-like coating on the flue walls that varies in thickness and texture depending on how the fireplace has been used over the years.

How Creosote Forms in the First Place

Creosote is a natural byproduct of burning wood. As wood combusts, it releases smoke containing tar vapors and other compounds that condense onto the cooler surfaces of the chimney interior, similar to the way steam from a shower condenses on a bathroom mirror. Every wood fire produces some amount of it. What varies enormously from one home to the next is how much has accumulated and how it has changed over time.

The Three Stages, and Why the Report Calls Out the Difference

Creosote does not stay the same once it forms. Inspectors generally describe it in three stages, and the distinction matters because it changes how the finding gets treated in negotiations. The first stage is a light, flaky, soot-like coating that brushes away easily during a standard cleaning and is generally treated as routine. The second stage is a harder, tar-like layer that takes more aggressive brushing to remove but is still considered manageable. The third stage is a glazed, hardened coating that can be difficult to remove and represents a meaningfully higher fire risk, since it can ignite at temperatures a normal fire reaches without much trouble.

A report that simply says creosote present without specifying the stage leaves both sides guessing about how serious the finding actually is, which is part of why a detailed Level 2 report matters more than a basic pass or fail note.

Why Stage Three Findings Worry Buyers' Agents

When a report specifically notes glazed, stage three creosote, agents on the buyer's side tend to treat it more seriously than a general mention of buildup, and reasonably so. Stage three deposits are harder to remove and carry a higher chimney fire risk than earlier stages, which means the recommended remediation, chemical treatment, specialized rotary tools, sometimes multiple sessions, is a more involved and more expensive process than a routine sweep.

What Causes Heavy Buildup in San Gabriel Valley Homes

A few patterns show up repeatedly in homes we inspect throughout Pasadena, Altadena, and the surrounding area. Burning wood that has not been properly seasoned is the single biggest contributor, since unseasoned wood burns cooler and produces more smoke relative to heat. Restricted airflow, whether from a partially closed damper or a chimney cap clogged with debris, has a similar effect. Fireplaces or flues that are oversized for the fires typically built in them also tend to accumulate creosote faster, since the smoke cools before it fully exits the flue.

The Chimney Fire Risk Buyers Are Really Asking About

When a buyer's agent asks pointed questions about creosote findings, what they are really asking about is chimney fire risk. Once ignited, accumulated creosote can burn hot enough to crack flue tiles and, in the worst cases, spread heat to nearby combustible framing. That risk is exactly why the finding gets documented so carefully rather than being noted with a single line.

Health and Air Quality Notes in the Report

Some reports also mention that creosote is a known carcinogen and can contribute to indoor air quality concerns if it is producing noticeable odors or if the buildup is affecting how well the fireplace drafts. This is usually secondary to the fire risk discussion but sometimes gets raised separately, particularly if a buyer has asthma or other respiratory sensitivities and is asking detailed questions during their inspection period.

What Happens When Two Reports Disagree

Occasionally a general home inspector will describe creosote in one way, and a specialist Level 2 report will describe the same chimney differently, since the general inspector is usually working with a flashlight and no camera. When that happens, the specialist report should be treated as the more reliable source, simply because it is based on a full video scan of the flue rather than what is visible from the firebox opening. Buyers and sellers who find themselves negotiating over conflicting descriptions are usually better served by resolving the disagreement with a single, detailed Level 2 assessment than by trying to split the difference between two reports that were never looking at the same amount of information.

How Sellers Can Clear This Off the Report Before Listing

Because creosote buildup is one of the most common and most predictable findings, it is also one of the easiest to address proactively. A professional sweep before listing removes most stage one and stage two deposits outright. If a pre-listing inspection reveals more advanced buildup, addressing it ahead of time means you are working on your own schedule rather than under a contingency deadline, and you can shop for the right specialist rather than accepting whoever has the fastest availability during escrow.

What Buyers Should Request If It Shows Up After an Offer

If creosote buildup appears on a report after your offer has already been accepted, it is reasonable to ask the seller to complete a professional cleaning before closing, particularly if the report notes stage two or stage three deposits. For a straightforward stage one finding, some buyers choose to accept the condition and simply schedule their own sweep shortly after moving in, since the cost and effort involved is relatively minor.

It also helps to ask specifically which stage the report describes rather than accepting a general reference to buildup. A seller or listing agent who cannot answer that question probably has not had the report explained to them in detail either, and getting a straight answer from the technician who performed the scan is usually faster than going back and forth through two sets of agents.

Getting a Second Opinion Before You Walk Away From a Deal

Creosote findings occasionally get described in alarming language on a general inspection report from someone who is not a chimney specialist. Before treating a vague mention of heavy buildup as a reason to renegotiate aggressively or walk away, it is worth bringing in a CSIA-certified technician for a proper Level 2 assessment, which will tell you the actual stage, extent, and recommended remediation rather than leaving you to guess.

Serving Pasadena Escrow Inspections Start to Finish

EverSafe Chimney Sweep performs Level 2 inspections and creosote remediation for buyers and sellers throughout Pasadena, Altadena, San Marino, Alhambra, La Canada Flintridge, and the surrounding San Gabriel Valley. Call (626) 275-8013 to schedule an inspection before your contingency deadline arrives.