Chimney inspection levels 1, 2 and 3

Why there are levels at all

The levels come from NFPA 211, the National Fire Protection Association's standard for chimneys, fireplaces, vents and solid fuel-burning appliances. The Chimney Safety Institute of America (CSIA) explains the levels for homeowners on its website, and CSIA's FAQ notes that NFPA 211 calls for chimneys, fireplaces and vents to be inspected at least once a year.

The idea is simple: the amount of inspection should match the amount of risk and change. A chimney used the same way with the same appliance year after year needs a different look than one that just had a chimney fire, a new insert, or a new owner.

Level 1: the routine annual inspection

CSIA describes a Level 1 inspection as an examination of the readily accessible portions of the chimney exterior and interior, and the accessible portions of the appliance and the chimney connection. "Readily accessible" generally means reachable without tools to open doors, panels or coverings.

A Level 1 is the right fit when:

• The chimney is in continued service under the same conditions.
• The same appliance is being used the same way.
• Nothing unusual has happened since the last inspection.

The inspector is looking for the basic soundness of the chimney, freedom from deposits and blockage, and correct clearances where they can be seen. A Level 1 is often done alongside a routine sweep.

Level 2: when something has changed

A Level 2 includes everything in a Level 1, plus the accessible portions of the chimney exterior and interior, including attics, crawl spaces and basements. CSIA's description also includes visual inspection by video scanning or other means to examine the internal surfaces and joints of all flue liners.

According to CSIA, a Level 2 is required when changes are made to the system, such as:

• A change in fuel type, for example converting from wood to gas.
• Changes to the shape or material of the flue, such as relining.
• Replacing or adding an appliance of a different type, input rating or efficiency.

It is also called for upon the sale or transfer of a property, and after an operating malfunction or external event that may have caused damage, such as a chimney fire, a lightning strike, a storm or building settlement.

CSIA's standard operating procedure for a Level 2 on a masonry chimney gives a sense of the scope: video scanning for cracks, gaps and offsets; the appliance and connector; clearances to combustibles; the attic, where accessible; and the crown, flashing and cap.

Level 3: when a hidden hazard is suspected

A Level 3 includes everything in Levels 1 and 2, plus the removal of certain components of the building or chimney where necessary. CSIA explains that a Level 3 is performed when a Level 1 or Level 2 inspection suggests a hidden hazard that cannot be evaluated otherwise, or when serious hazards are suspected.

Examples of what that can involve include opening a wall or ceiling to check clearances around a chimney, removing a chimney crown, or taking apart part of a chase. Because it can involve demolition and later repair, a Level 3 is not routine. It is done when the evidence justifies it, and the scope should be agreed in advance.

The three levels side by side

Which level do you need?

• Same fireplace, same use, nothing has happened: Level 1, typically with a sweep if deposits are present.
• Buying or selling a home: Level 2. See Buying a home with a fireplace and our inspection for buying or selling.
• Installing an insert, stove, gas logs or a new furnace or water heater on the chimney: Level 2. See inspection before a new appliance.
• After a chimney fire, lightning, a storm, an earthquake or a fallen tree: Level 2. See What to do after a chimney fire.
• Smoke or stains where they should not be, or a Level 2 found something that cannot be judged without opening the structure: possibly Level 3.

If you are unsure, describe what has changed, and the inspector can recommend the level.

What any inspection can and cannot do

An inspection reports on the condition of what can be seen and accessed at that time. Even CSIA's own Level 2 procedure cautions that following it may not reveal every possible defect. Heavy deposits can hide a liner surface, offsets can limit a camera, and conditions behind finished walls are not visible without a Level 3.

An inspection is also a snapshot. It does not predict how long a chimney will last or whether a component will fail later. Findings should be read for what they are: a documented look at the system on a given day, with recommendations.

Preparing for an inspection

A little preparation helps the inspector see more and saves time:

• Stop using the fireplace or stove at least a day before, so the firebox and flue are cool. Gas appliances should be off and cool as well.
• Clear the area in front of the fireplace, and if possible, the path to the attic access and the basement where the chimney passes through.
• Gather history. When was the chimney last swept or inspected? Has the appliance changed? Have you noticed smoke, smells, stains, leaks or animal noises?
• Find old reports. Earlier photos or inspection reports make it possible to compare conditions and see whether a crack is new or growing.
• Note every flue. Many New Jersey homes have a fireplace flue plus a separate flue for the furnace, boiler or water heater. Mention all of them.

After the inspection

You should come away with a clear answer to three questions: what is the condition of each part that was inspected, what could not be inspected and why, and what is recommended next. Recommendations usually fall into a few groups: items that should be fixed before the appliance is used again, items that should be planned for, and routine maintenance.

If an item is marked as a safety concern, follow the advice not to use the appliance until it is resolved. If you are unsure whether a recommendation is urgent, ask. A good inspector will explain the reasoning and point to the evidence in the photos.

Keep the report with your home records. It is useful the next time the chimney is inspected, if you file an insurance claim, and when the house is sold.

How we approach inspections

Every visit starts with an assessment. We use a chimney camera when the flue allows, check the attic and roof when it is safe and accessible, and use controlled water testing when a leak source is unclear. You get findings with photos before any repair is scheduled. See our chimney inspection page for details, or request service.

Questions homeowners ask

Sources

1. CSIA: The Three Levels of Chimney Inspections
2. CSIA: Frequently Asked Questions
3. CSIA: Level 2 Inspection SOP, Masonry Chimney (PDF)
4. CSIA: Homeowner Resources

This guide is general information. It can't diagnose a specific chimney; an inspection can.