What is the difference between a Level 1 and a Level 2 chimney inspection?
Under NFPA 211, a Level 1 inspection is the routine annual check of readily accessible parts of the chimney and appliance connection, done without cameras or tools. A Level 2 adds a video scan of the full flue interior and a look at accessible attics, basements and crawl spaces. It is called for on a sale, a change in fuel or appliance, or after a chimney fire.
Why the Level Matters More Than the Price of the Visit
Every week we get a call from someone in Crown Heights who had a chimney inspected and still does not know whether the flue is safe. Usually the visit was a Level 1 when the situation called for a Level 2, and nobody told the owner the difference. The level determines what gets looked at, what tools are used and what the report can honestly claim.
NFPA 211, the national standard for chimneys, fireplaces and vents, defines three levels. This guide covers the two that apply to nearly every rowhouse, co-op and frame house in the neighborhood, explains when each is the right choice, and shows you what a camera scan reveals that eyes alone cannot.
Level 1: The Annual Look at What You Can Reach
A Level 1 inspection is the minimum NFPA 211 expects once a year. The technician examines the readily accessible portions of the chimney, the appliance and the connector: the firebox, damper, smoke chamber as far as it can be seen, the connector pipe behind a boiler, the exterior of the stack and the top from the roof when it can be reached safely. The purpose is to confirm the flue is free of combustible deposits and obstructions, that the installation is basically sound, and that nothing visible has changed since last year.
No cameras, no removal of panels, no opening of walls. That is by design. A Level 1 is fast and inexpensive, and for a chimney that has been inspected regularly with no change in use it is the right choice. It is the visit we pair with a routine annual chimney inspection and sweep for most owners who have lived in their house for years with the same fireplace or boiler.
Level 2: When NFPA 211 Calls for a Camera
A Level 2 inspection includes everything in a Level 1 and then goes inside. NFPA 211 requires a visual inspection of all internal surfaces of the flue, including the liner and the joints between tiles, and the practical way to do that is a video camera run the full length of the flue. The technician also checks clearances to combustibles wherever there is access, which means a look in accessible attics, basements and crawl spaces along the chimney's path. Nothing permanent is removed and no walls are opened.
NFPA 211 names the situations that call for a Level 2. The first is a sale or transfer of the property. The second is a change in the fuel type, the appliance, or the way the flue is used, such as switching an oil boiler to gas or adding a wood insert to an open fireplace. The third is after an operating malfunction or an external event that may have damaged the chimney, such as a chimney fire, a building fire, a lightning strike, an earthquake or severe weather.
If you are under contract on a rowhouse in Crown Heights, or in Prospect Heights or Bedford-Stuyvesant where the same 1890s to 1910s stock dominates, a Level 2 is the inspection you want in hand before closing. A home inspector's glance up the firebox is not a substitute, and a seller's one-line sweep receipt tells you nothing about the tile joints halfway up.
What the Camera Finds That Eyes Cannot
A rowhouse flue is a column of clay flue tile stacked inside brick, usually with offsets where it bends around the floor above. From the firebox you can see the first few feet at best. The camera sees the rest, and these are the findings that change the conversation on a sale or a fuel change.
- Cracked or split flue tiles, which let heat and gases reach the brick and the framing beside it
- Missing or eroded mortar between tiles, leaving open joints that trap creosote and leak
- Offset tiles at the bends, where one tile has shifted and left a ledge that catches debris
- Glazed creosote above the smoke chamber that a sweep from below missed
- Fallen crown fragments or nesting material resting on an offset
- An oversized flue with white staining from gas condensation, a sign the flue needs a stainless liner
- A second flue venting into the same tile run, which is a carbon monoxide risk in multi-flue stacks
How a Level 2 Inspection Runs on a Rowhouse
A Level 2 is a sequence that touches the inside of the house, the roof and the flue itself, and the report at the end is only as good as the steps behind it.
- Interview and exterior walkWe ask what the flue serves, what is changing, and whether anything has happened. Then we look at the stack from the street and the roof, noting the crown, cap, flashing and any lean or spalling brick.
- Level 1 scope insideFirebox, damper, smoke chamber, boiler connector and the appliance installation are checked exactly as they would be on an annual visit, and deposits are measured.
- Full-length camera scanA camera on rods runs the full flue, recorded top to bottom. Every joint, offset and crack is captured with a position noted so a repair crew can find it later.
- Clearance check in accessible spacesWhere the chimney passes an accessible cellar, attic or closet, we check for combustibles against the masonry and for signs of heat or moisture on adjacent framing.
- Written report, tiered by urgencyYou receive photos, video stills, a plain description of each finding and a recommendation marked as safety, repair soon or monitor, with the path forward if a liner or masonry work is needed.
Reading the Report Before You Close or Convert
A good Level 2 report tells you three things in order: whether the flue is safe to use as it stands, what is deteriorated and how urgently it matters, and what fixing it involves. If the report says the flue is unlined or the tiles are cracked and the house is converting to gas, the answer is almost always a stainless steel chimney liner sized to the new appliance, and a buyer can price that before signing.
Be wary of a report that is a single page with a pass or fail and no photos, or one that recommends a full rebuild without showing you a single joint. Both tell you more about the inspector than the chimney. Our chimney and masonry FAQ covers more of the questions buyers bring to us, and our crew is glad to walk through any report you have received, including one from another company.
Sellers benefit too. A Level 2 done before listing, with the small repairs handled, removes the chimney as a negotiating point. Owners in Flatbush frame houses with shorter stacks see the same advantage, because a camera report ends the guessing on both sides of the table.
Frequently Asked Questions
Do I need a Level 2 inspection when buying a rowhouse in Crown Heights?
NFPA 211 calls for a Level 2 on any sale or transfer of property, and we agree with it. A general home inspector does not run a camera up the flue, and a seller's sweep receipt does not describe tile condition. The camera scan is the only way to know whether the flues are sound, and the report gives you a documented basis for negotiation before closing.
I am converting my oil boiler to gas. Which inspection level applies?
A change in fuel type is one of the named triggers for a Level 2 under NFPA 211. The scan documents whether the existing flue is lined, its size and condition, and whether it can accept a stainless liner sized to the new gas appliance. In nearly every pre-war flue we scan, the conversion requires a liner, and the inspection report is what the liner installation is designed from.
What is a Level 3 inspection and will I need one?
A Level 3 includes everything in a Level 2 and adds removal of components or opening of walls where a hidden hazard is suspected and cannot be confirmed any other way. It is rare and reserved for serious situations, such as evidence of a chimney fire that reached the framing or structural damage to the stack. We recommend it only when a Level 2 finds something that cannot be resolved without opening the building.
How long does a Level 2 inspection take?
Long enough to do the camera scan properly and check accessible spaces, which depends on the number of flues, the height of the stack and how many offsets the camera has to work through. A single rowhouse fireplace flue is quicker than a three-flue stack serving two fireplaces and a boiler. We tell you the expected time when we book and send the written report after reviewing the footage.
Can a Level 1 inspection catch a cracked flue tile?
Only if the crack is in the first few feet visible from the firebox or the top. Most tile damage sits at offsets and in the middle of the run, where only a camera reaches. That is why the annual Level 1 is enough for an unchanged chimney with a known history, but a sale, a fuel change or a chimney fire moves the requirement to a Level 2.
