§ Chapter 10 IRC 2021
Chimneys and Fireplaces
10 entries from Chapter 10 of IRC 2021, organized by section number. Each entry covers what the code requires, why it exists, what inspectors look for, and common mistakes.
§ 01 Sections
All 10 entries.
Sorted by section number. Click any row for the full entry — answer, requirements, edition diff, related sections.
Section
Title
Question
R1001.2
Masonry Fireplaces Need Proper Footings and Support
R1001.2
What foundation is required for a masonry fireplace?
What foundation is required for a masonry fireplace?
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R1001.7
Masonry Firebox Dimensions Are Regulated by Opening Size
R1001.7
What are the code dimensions for a masonry fireplace firebox?
What are the code dimensions for a masonry fireplace firebox?
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R1001.10
Hearth Extensions Must Project Beyond the Fireplace Opening
R1001.10
How far does a fireplace hearth have to extend?
How far does a fireplace hearth have to extend?
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R1001.11
Combustible Trim Must Stay Clear of Fireplace Openings
R1001.11
How close can wood trim be to a masonry fireplace opening?
How close can wood trim be to a masonry fireplace opening?
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R1003.9
Chimney Caps and Spark Arrestors Must Fit the Chimney and Fuel Risk
R1003.9
Does the IRC require a chimney cap or spark arrestor?
Does the IRC require a chimney cap or spark arrestor?
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R1003.9
Chimneys Must Terminate High Enough Above the Roof
R1003.9
What is the 3-2-10 chimney height rule?
What is the 3-2-10 chimney height rule?
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R1003.11
Masonry Chimneys Need Proper Flue Liners
R1003.11
Does a masonry chimney need a flue liner under IRC 2021?
Does a masonry chimney need a flue liner under IRC 2021?
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R1003.18
Masonry Chimneys Need Clearance From Combustible Framing
R1003.18
How much clearance is required around a masonry chimney?
How much clearance is required around a masonry chimney?
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R1004.1
Factory-Built Fireplaces Must Be Listed and Installed by Instructions
R1004.1
What code applies to a factory-built fireplace?
What code applies to a factory-built fireplace?
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R1005.1
Factory-Built Chimneys Must Match Their Listing and Appliance
R1005.1
Can I mix factory-built chimney parts from different brands?
Can I mix factory-built chimney parts from different brands?
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