Building Code Glossary
Roof Covering: Building Code Definition
How the IBC 2009, IRC 2009 define roof covering, where the wording differs, and which chapters depend on the term.
On this page
Last updated September 7, 2026 · Definitions quoted from the 2009 International Codes as transcribed in this site's building-codes collection, with the source chapter linked for each quotation. Usage counts are computed over the chapters hosted here, one copy per code. The [ICC code library](https://codes.iccsafe.org/codes) publishes the current model text and the [ICC adoption maps](https://www.iccsafe.org/advocacy/code-adoption-maps/) show which edition a jurisdiction has adopted; those sources control.
Direct answer
Roof covering is a defined term in the International Building Code (IBC) 2009, in Roof Assemblies and Rooftop Structures. The code's own words are: “The covering applied to the roof deck for weather resistance, fire classification or appearance.” The IRC 2009 carries the same definition word for word, so the term means the same thing in each. The term is used in 15 chapters of this corpus, most often in Roof Assemblies and Rooftop Structures (IBC 2009), Roof Assemblies (IRC 2009), Fire and Smoke Protection Features (IBC 2009). These pages transcribe the 2009 model text; verify the definition against the edition and amendments your authority having jurisdiction has adopted. Record the jurisdiction, the adopted edition, the application date and any local amendment that rewrites the definition before you use it on a live project, because a term redefined by amendment changes every requirement that depends on it.
Content and cited inputs reviewed by Scott Barrington, Harth founder and architectural technology specialist · Published 2026-09-07 · Updated 2026-09-07.
What does this term mean?
Roof Covering — IBC 2009, Roof Assemblies and Rooftop Structures:
The covering applied to the roof deck for weather resistance, fire classification or appearance.
What must be verified before using this guidance?
Two of the I-Codes in this corpus define Roof Covering, in identical words.
| Code | Where it is defined | Definition |
|---|---|---|
| IBC 2009 | Roof Assemblies and Rooftop Structures | The covering applied to the roof deck for weather resistance, fire classification or appearance. |
| IRC 2009 | Definitions | The covering applied to the roof deck for weather resistance, fire classification or appearance. |
Where roof covering is used in the code
The term appears in 15 chapters of the 2009 I-Codes hosted here. The chapters that lean on it hardest are the ones to read next.
| Chapter | Code | Mentions |
|---|---|---|
| Roof Assemblies and Rooftop Structures | IBC 2009 | 103 |
| Roof Assemblies | IRC 2009 | 53 |
| Fire and Smoke Protection Features | IBC 2009 | 17 |
| Building Planning | IRC 2009 | 14 |
| Definitions | IRC 2009 | 12 |
| Plastic | IBC 2009 | 10 |
| Structural Design | IBC 2009 | 9 |
| Solar Systems | IRC 2009 | 6 |
| Definitions | IBC 2009 | 4 |
| Solar Systems | IMC 2009 | 4 |
| Wood | IBC 2009 | 3 |
| Definitions | IECC 2009 | 3 |
3 further chapters mention the term.
The term in use
How the code actually writes about roof covering, quoted from the 2009 text hosted here:
Cricket or saddle coverings shall be sheet metal or of the same material as the roof covering.
The requirements set forth in this section shall apply to the application of roof covering materials specified herein.
The thermal barrier specified in Section R316.4 is not required when the foam plastic in a roof assembly or under a roof covering is installed in accordance with the code and the manufacturer's installation instructions and is separated from the interior of the building by tongue-and-groove wood planks or wood structural panel sheathing in accordance with Section R803, not less …
The terms roof covering is built out of
The definition above leans on 1 other defined term. Each carries its own code definition, and a local amendment to any of them changes what roof covering covers:
- Roof Deck — IBC 2009: The flat or sloped surface not including its supporting members or vertical supports.
Roof Covering: what to open, and in what order
Every row is a document this term depends on. The ICC code library and the ICC adoption maps cover the middle rows.
| Check | Where | Confirmed |
|---|---|---|
| Read the definition in the adopted IBC | Roof Assemblies and Rooftop Structures | |
| Read the definition in the adopted IRC | Definitions | |
| Re-check the requirement that uses it | Roof Assemblies and Rooftop Structures (IBC 2009) | |
| Re-check the requirement that uses it | Roof Assemblies (IRC 2009) | |
| Re-check the requirement that uses it | Fire and Smoke Protection Features (IBC 2009) | |
| Re-check the requirement that uses it | Building Planning (IRC 2009) | |
| Confirm the dependent definition | Roof Deck | |
| Local amendment to any of the above | Jurisdiction's amendment list |
A research aid, not a code determination. The authority having jurisdiction decides which edition and which amendments apply.
Where can you explore related guidance?
- Explore all glossary guidance
- Roof Deck: Building Code Definition
- Aggregate: Building Code Definition
- Roof Assembly: Building Code Definition
- Underlayment: Building Code Definition
Sources and method
Definitions quoted from the 2009 International Codes as transcribed in this site's building-codes collection, with the source chapter linked for each quotation. Usage counts are computed over the chapters hosted here, one copy per code. The ICC code library publishes the current model text and the ICC adoption maps show which edition a jurisdiction has adopted; those sources control.
Source links
Frequently asked questions
What is the code definition of roof covering?
The International Building Code (IBC) 2009 defines it in Roof Assemblies and Rooftop Structures as: “The covering applied to the roof deck for weather resistance, fire classification or appearance.” The 2009 model text is reproduced here; the definition that binds your project is the one in the edition your jurisdiction has adopted, as amended locally.
Which parts of the code depend on roof covering?
In this corpus the term is used across 15 chapters, led by Roof Assemblies and Rooftop Structures in the IBC 2009. Those are the sections whose scope moves if the definition is amended locally, so read them together with Chapter 2 rather than on their own.
What is considered a roof covering?
In the 2009 I-Codes hosted here it is a defined term rather than a description. The IBC 2009 states, in Roof Assemblies and Rooftop Structures: “The covering applied to the roof deck for weather resistance, fire classification or appearance.” It is defined in IBC 2009, IRC 2009. Because it is a defined term, whatever the adopted edition says it means is what every section using it means — so check Chapter 2 of that edition and any local amendment before relying on this wording.
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