Short answer: yes, if the house has a fireplace, wood stove, or a chimney that vents a furnace or water heater, a dedicated chimney inspection before closing is one of the smarter things a buyer can do. The chimney is one of the few parts of a house that is mostly hidden from view, that can fail in ways that start fires or leak carbon monoxide, and that a standard home inspection almost never examines from the inside. Here is what that inspection involves, what it tends to find in Puget Sound homes, and how to use the results before you sign.
Why a general home inspection is not enough
Home inspectors do valuable work, but their job is breadth, not depth. In a few hours they cover the roof, foundation, electrical, plumbing, HVAC, and everything in between. When it comes to the chimney, most inspectors look at what is visible from the ground or the roofline, open the damper, shine a flashlight up the firebox, and note anything obvious. Their reports typically include language recommending further evaluation by a chimney professional, and that line is easy to skim past.
What a general inspection does not do is look inside the flue. The flue liner is the part of the chimney that actually contains the fire's heat and gases, and it runs from the firebox to the top of the chimney, out of sight the entire way. Cracked clay tiles, missing mortar joints between tiles, gaps where a liner section shifted, heavy creosote glazing, or a liner that simply does not exist in an older masonry chimney are all conditions you cannot see with a flashlight. You need a camera.
What NFPA 211 says about property transfers
NFPA 211 is the national standard that covers chimneys, fireplaces, and venting systems. It describes three levels of inspection, and it recommends a Level 2 inspection whenever a property changes hands. It is worth being precise here: this is a recommendation from a standard, not a code requirement in Washington. No one will stop your closing because you skipped it. The standard recommends it because a sale is exactly the moment when a new owner has no history with the system and no way to know how it was used or maintained.
A Level 2 inspection includes everything in a basic Level 1 visual check plus a video scan of the interior of the flue, along with a look at accessible areas of the attic, crawl space, and basement where the chimney passes through. If you want a fuller breakdown of what separates the three tiers, see our guide to inspection levels 1, 2, and 3. For a purchase, Level 2 is the one to ask for.
What the camera actually finds
Running a camera up the flue turns an unknown into a documented condition. In homes around Seattle, Tacoma, and the Eastside, a few findings come up again and again.
- Cracked or broken flue tiles. Clay liners crack from thermal shock, settling, and age. A crack means heat and gases can reach the surrounding masonry and framing. A previous owner would rarely know this existed.
- Missing mortar joints. The joints between liner tiles erode over decades, leaving gaps that have the same effect as cracks.
- No liner at all. Many older masonry chimneys in the region were built before liners were standard. An unlined chimney serving a wood-burning fireplace is a condition most buyers want to know about before closing, not after.
- Creosote buildup. Glazed, tar-like creosote tells you the fireplace was used heavily, often with wet wood or a smoldering burn. It is the fuel for a chimney fire and sometimes leaves evidence that one already happened.
- Signs of a past chimney fire. Puffy, expanded creosote, warped dampers, and tiles cracked in a particular pattern can indicate the flue already had a fire that nobody mentioned.
- Water damage. Our climate is hard on chimneys. Spalling brick, deteriorated crowns, rusted dampers, and efflorescence staining all point to water getting in. If you have noticed stains on the ceiling near the fireplace, read about why chimneys leak when it rains.
- Blockages and animals. Nests, debris, and collapsed tile fragments can partially block a flue and send smoke or combustion gases back into the house.
- Improper clearances. Where the chimney is visible in the attic, an inspector checks whether framing sits too close to the masonry or metal chimney.
Some of these are cosmetic. Some are maintenance items. Some mean the fireplace should not be used until repaired. The value of the inspection is that you learn which is which while you still have options.
Timing: fit it into your inspection contingency
In a typical Washington purchase, the inspection contingency gives you a window, often around ten days, to investigate the property and either proceed, negotiate, or walk away. Schedule the chimney inspection as early in that window as you can, ideally the same week as the general home inspection. That leaves time to get a written report, understand any repair recommendations, and bring them to the negotiation table before the contingency expires.
In a competitive market like Bellevue and the surrounding Eastside, some buyers are tempted to waive inspections altogether. If you are in that position and the house has a wood-burning fireplace, consider at least a pre-offer chimney inspection if the seller allows access. Knowing the flue's condition is worth more than the hour it takes.
Using the report to negotiate
A written Level 2 report with photos or video stills gives you something concrete. Here is how buyers commonly use it.
- Request repairs before closing. For clear safety items, such as a cracked liner or a damaged crown letting water in, you can ask the seller to complete the work and provide documentation.
- Request a credit instead. Many buyers prefer a seller credit so they can choose their own contractor and oversee the work after moving in. Get a written repair estimate from a chimney company to support the number.
- Accept as-is with eyes open. If the findings are minor, you may decide the house is still worth the price and simply plan the work for after closing.
- Walk away. Occasionally a report reveals a chimney that needs to be rebuilt or fully relined, and for some buyers that changes the math enough to exercise the contingency.
Keep in mind that sellers generally are not obligated to fix what they did not know about, and a flue defect is usually news to them too. A calm, documented request tends to get further than an accusatory one.
If the house has a gas fireplace or gas appliances
Gas fireplaces and gas-vented furnaces or water heaters still need a chimney or vent in good condition. Corrosion inside a masonry flue from gas appliance condensation is common and hard to see. A chimney inspection covers the venting path. Any work on the gas line itself, however, belongs to a licensed gas technician, not a chimney sweep and definitely not a homeowner.
What happens after you move in
The purchase inspection sets your baseline. From there, the standard practice is an annual chimney inspection, with sweeping whenever the inspection finds enough creosote or debris to warrant it. Not every inspection leads to a cleaning. Your first year in the house is also when you will learn how the fireplace drafts, whether the damper seals, and whether any water shows up during the wet season, so keep the purchase report handy to compare against.
Questions to ask the chimney company you hire
- Will this be a Level 2 inspection with a camera scan of the full flue?
- Will I receive a written report with images I can share with my agent and the seller?
- Does the inspection include the attic and crawl space where the chimney passes through, if accessible?
- If repairs are recommended, will you explain which are safety-related and which are maintenance?
A buyer who asks these questions usually ends up with a report that is actually useful in negotiation rather than a vague note to have it looked at later.
The bottom line
A chimney inspection before buying a home is not required by anyone, but it is recommended by the standard that governs chimneys, and for good reason. The flue is hidden, the consequences of a hidden failure are serious, and the cost of finding out is small compared to the purchase itself. If you are under contract on a home in the Seattle or Tacoma area and the house has a fireplace, schedule a chimney inspection early in your contingency window. Call 206-207-3974 and let us know your closing timeline so we can fit it in.
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