Chimney Inspection Level 3 Seattle, WA

A Level 3 chimney inspection is the highest level described in NFPA 211, and it is the only level that involves removing parts of the chimney or the surrounding building to look inside. It is reserved for situations where a Level 1 or Level 2 inspection has found, or strongly suggested, a hazard that cannot be confirmed or sized up without opening something: a chimney crown, a section of chase cover, drywall or plaster beside the chimney, a hearth extension, or masonry around a flue. If you are in King, Pierce or Snohomish County and a technician, home inspector or fire investigator has told you a Level 3 is needed, this page explains what that means and what happens next.

Most homeowners never need a Level 3. The annual check is a Level 1. A Level 2 adds a camera scan of the flue and is the standard inspection for a home sale, a change in fuel or appliance, or after an event like a chimney fire. The line between Level 2 and Level 3 is simple: a Level 2 looks at everything reachable with a camera and a flashlight. A Level 3 takes things apart, because the evidence says a problem is hidden behind them.

James Chimney Sweep has served the Puget Sound for more than 25 years, is CSIA certified, and is licensed, bonded and insured in Washington. We do not recommend a Level 3 lightly, and we open only what is necessary.

Timing & Safety

When a Level 3 is necessary and when it is not

A Level 3 is necessary when a lower-level inspection has turned up evidence of a serious hazard that cannot be confirmed without removing part of the structure, and when the consequence of being wrong is a fire or a structural failure. It is also the inspection that insurance adjusters and fire investigators often rely on after a chimney fire, because it produces direct evidence rather than an inference from the flue camera.

• Necessary: camera evidence of flue breaches whose extent is unknown; heat damage to finishes beside the chimney; suspected missing firestops; post-fire damage that may extend into framing; structural movement of the stack.
• Usually not necessary: a routine yearly check, a typical home sale, a simple appliance change, or a damp smell after a wet winter. These are handled by a Level 1 or Level 2 inspection, and our Chimney Inspection page explains how to choose between them.

If you are unsure, start with a Level 2. It either rules out the hidden problem or gives us the evidence to plan a small, targeted Level 3.

Safety considerations

Concealed chimney defects are dangerous precisely because they are out of sight. Heat escaping a cracked flue tile or a missing firestop can slowly char framing for years before anything visible changes. Until a suspected hazard has been inspected and resolved, stop using the fireplace, stove or connected appliance.

• Do not attempt to open walls, ceilings or masonry around a chimney yourself; you may expose or disturb damaged components and create new hazards.
• Do not go on the roof to look at the crown or cap. Let us handle the access.
• If the chimney serves a gas appliance and you smell gas, leave the house and call the gas utility or 911. Gas lines and valves are only serviced by a qualified technician.
• Keep working smoke and carbon monoxide alarms on every level, especially while a chimney problem is unresolved.

Seattle & Puget Sound conditions

Seattle and Puget Sound chimneys spend most of the year wet. Rain driven sideways off the Sound, moss holding moisture on shaded crowns, and the freeze-thaw cycles we get in cold snaps all push water into masonry and behind chase covers where it stays hidden. By the time staining shows on a ceiling in Tacoma or Everett, the damage inside the chase or at a firestop may be well advanced. Older Seattle homes with unlined or partially lined brick chimneys, and 1980s and 1990s factory-built fireplaces in wood chases across King, Pierce and Snohomish counties, are the two situations where we most often find that a Level 2 cannot answer the question and a targeted Level 3 is warranted.