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Chimney Flue Inspection

During a home inspection, your inspector will make their best effort to perform a visual inspection of the readily accessible and visible portions of all fireplaces and chimneys. Home inspectors are not required to inspect the interior of chimney flues per state standards of practice. The condition of the interior of the chimney flue cannot always be determined.

Maida Inspection Services suggests you ask Sellers for any documentation they have available regarding chimney flue inspections or chimney flue replacements.

If no documentation is available, recommend a level 2 chimney inspection by a professional chimney contractor or a chimney sweep as may be required by the National Fire Protection Association (NFPA) 211.


(A Public Safety Bulletin from the Chimney Safety Institute of America

Until recently, the scope of work performed in the inspection or evaluation of a fireplace, stove or other venting system was generally up to the discretion of the chimney service technician. Professional service technicians now have an industry standard that removes much of that 'discretion." The National Fire Protection Association (NFPA) has addressed the minimum chimney inspection standards in its latest publication (NFPA 211) concerning home heating appliances.

Inspections are now classified as Level 1, Level 2 or Level 3. Each level of inspection covers specific items depending on the individual appliance and venting system.

Below is an explanation of the three levels of inspections and what services your chimney service technician should provide for each level.

Level 1 Inspections - If your appliance or your venting system has not changed and you plan to use your system as you have in the past, then a Level 1 inspection is a minimum requirement.

A Level 1 inspection is recommended for a chimney under continued service under the same conditions and with the continued use of the same appliance.

In a Level 1 inspection, your chimney service technician should examine the readily accessible** portions of the chimney exterior, interior and accessible* portions of the appliance and the chimney connections. Your technician will be looking for the basic soundness of the chimney structure and flue as well as the basic appliance installation and connections. The technician will also verify the chimney is free of obstruction and substantially free of combustible deposits.

*Accessible: May require the use of commonly available tools to remove doors, panels or coverings, but will not damage the chimney or building structure or finish.

*'Readily Accessible: Exposed, or capable of being exposed, for operation, inspection, maintenance or repair without the use of tools to open or remove doors, panels or coverings.

Level 2 Inspections - A Level 2 inspection is required when any changes are made to the system. Changes can include a change in the fuel type, changes to the shape of, or material in, the flue (i.e. relining), or the replacement or addition of an appliance of a dissimilar type, input rating or efficiency. Additionally, a Level 2 inspection is required upon the sale or transfer of a property or after an operating malfunction or external event that is likely to have caused damage to the chimney. Building fires, chimney fires, seismic events as well as weather events are all indicators that this level of inspection is warranted. A Level 2 inspection is a more in-depth inspection than a Level 1 inspection.

A Level 2 inspection includes everything in a Level 1 inspection, plus the accessible* portions of the chimney exterior and interior including attics, crawl spaces and basements. It will address proper clearances from combustibles in accessible' locations. There are no specialty tools (i.e. demolition equipment) required to open doors, panels or coverings in performing a Level 2 inspection. A Level 2 inspection shall also include a visual inspection by video scanning or other means in order to examine the internal surfaces and joints of all flue liners incorporated within the chimney. No removal or destruction of permanently attached portions of the chimney or building structure or finish shall be required by a Level 2 inspection.

Level 3 Inspections When a Level 1or Level 2 inspection suggests a hidden hazard and the evaluation cannot be performed without special tools to access concealed areas of the chimney or flue, a Level 3 inspection is recommended. A Level 3 inspection addresses the proper construction and condition of concealed portions of the chimney structure and the flue. Removal or destruction, as necessary, of permanently attached portions of the chimney or building structure will be required for the completion of a Level 3 inspection.

Level 3 inspection - A Level 3 inspection includes all the areas and items checked in; Level 1 and a Level 2 inspection, as well as the removal of certain components of the building or chimney where necessary. Removal of components (i.e., chimney crown, interior chimney wall) shall be required only when necessary to gain access to areas that are the subject of the inspection. When serious hazards are suspected, a Level 3 inspection may well be required to determine the condition of the chimney system.

The Importance of Annual Inspections

Your chimney systems are an important part of your home heating system. The National Fire Protection Association recommends an annual evaluation of all chimneys, fireplaces and vents. In accordance with this recommendation, your chimneys should be checked annually by a CSIA Certified Chimney Sweep'- and swept as required. Each year unsafe chimneys cause significant numbers of injuries and deaths, and account for more than $200 million in property losses. Make chimney examinations a regular part of your home maintenance schedule. Don't become a statistic!


· Annual Inspection

· Routine Cleaning of Flue

· Direct Replacement of a Similar Appliance


  • Upon any sale or transfer of property.

  • After an operating malfunction or an external event is likely to have caused damage to the chimney.

  • Addition or removal of one or more connected appliances, or the replacement of an appliance with one of a different type, a different input rating or a different efficiency.

  • Prior to relining or replacement of the flue lining.


  • Where necessary for the investigation of an incident which has caused damage to the chimney or building.

  • Where a hazard is detected or suspected as the result of a Level I or a Level 2 inspection and the suspected hazard cannot be fully evaluated without access to concealed areas.

  • A Level 3 inspection may be required when the construction of all or part of the chimney is deemed critical to the renewed or continued use of the chimney due to potential concealed defects.

Good resources: Chimney Safety Institute of America

Chimney sweep guild

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