§ Chapter 9 IRC 2018
Roof Assemblies
10 entries from Chapter 9 of IRC 2018, 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
R903.1
Roof Covering Requirements Under IRC 2018
R903.1
Does the IRC require a roof covering on every dwelling?
Does the IRC require a roof covering on every dwelling?
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R903.2
Roof Flashing Requirements Under IRC 2018
R903.2
Where is roof flashing required by IRC 2018?
Where is roof flashing required by IRC 2018?
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R903.4
Roof Drainage Requirements Under IRC 2018
R903.4
Does the IRC require gutters or roof drainage?
Does the IRC require gutters or roof drainage?
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R905.2.2
Minimum Roof Slope for Asphalt Shingles Under IRC 2018
R905.2.2
What is the minimum roof slope for asphalt shingles under IRC 2018?
What is the minimum roof slope for asphalt shingles under IRC 2018?
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R905.2.6
Asphalt Shingle Nailing Requirements Under IRC 2018
R905.2.6
How many nails are required for asphalt shingles by code?
How many nails are required for asphalt shingles by code?
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R905.2.7
Roofing Underlayment Requirements Under IRC 2018
R905.2.7
Is roofing underlayment required by IRC 2018?
Is roofing underlayment required by IRC 2018?
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R905.2.7.1
Ice Barrier Requirements for Roofs Under IRC 2018
R905.2.7.1
When is an ice barrier required on a roof?
When is an ice barrier required on a roof?
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R905.2.8.2
Roof Valley Flashing Requirements Under IRC 2018
R905.2.8.2
What does code require for roof valley flashing?
What does code require for roof valley flashing?
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R905.2.8.5
Drip Edge Requirements Under IRC 2018
R905.2.8.5
Is drip edge required by IRC 2018?
Is drip edge required by IRC 2018?
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R907.3
Re-Roofing Over Existing Shingles Under IRC 2018
R907.3
Can you put new shingles over old shingles under IRC 2018?
Can you put new shingles over old shingles under IRC 2018?
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§ 02 Chapter navigation