Building Code Glossary
Cast Stone: Building Code Definition
How the IBC 2009 define cast stone, 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
Cast stone is a defined term in the International Building Code (IBC) 2009, in Masonry. The code's own words are: “A building stone manufactured from portland cement concrete precast and used as a trim, veneer or facing on or in buildings or structures.” No other I-Code in this corpus defines it, so the IBC 2009 definition is the one to work from. The term is used in 3 chapters of this corpus, most often in Wall Construction (IRC 2009), Masonry (IBC 2009), Definitions (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?
Cast Stone — IBC 2009, Masonry:
A building stone manufactured from portland cement concrete precast and used as a trim, veneer or facing on or in buildings or structures.
What must be verified before using this guidance?
Cast Stone is defined once in this corpus, in the Masonry chapter of the International Building Code (IBC) 2009:
A building stone manufactured from portland cement concrete precast and used as a trim, veneer or facing on or in buildings or structures.
Where cast stone is used in the code
The term appears in 3 chapters of the 2009 I-Codes hosted here. The chapters that lean on it hardest are the ones to read next.
| Chapter | Code | Mentions |
|---|---|---|
| Wall Construction | IRC 2009 | 4 |
| Masonry | IBC 2009 | 2 |
| Definitions | IBC 2009 | 1 |
The term in use
How the code actually writes about cast stone, quoted from the 2009 text hosted here:
Bonding with natural and cast stone shall conform to Sections R608.1.3.1 and R608.1.3.2.
The terms cast stone is built out of
The definition above leans on 3 other defined terms. Each carries its own code definition, and a local amendment to any of them changes what cast stone covers:
- Building — IBC 2009: Any structure used or intended for supporting or sheltering any use or occupancy.
- Facing — IRC 2009: The wood structural panel facings that form the two outmost rigid layers of the structural insulated panel.
- Veneer — IBC 2009: A facing attached to a wall for the purpose of providing ornamentation, protection or insulation, but not counted as adding strength to the wall.
Cast Stone: 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 | Masonry | |
| Re-check the requirement that uses it | Wall Construction (IRC 2009) | |
| Re-check the requirement that uses it | Masonry (IBC 2009) | |
| Re-check the requirement that uses it | Definitions (IBC 2009) | |
| Confirm the dependent definition | Building | |
| Confirm the dependent definition | Facing | |
| Confirm the dependent definition | Veneer | |
| 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
- Building: Building Code Definition
- Veneer: Building Code Definition
- Facing: 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 cast stone?
The International Building Code (IBC) 2009 defines it in Masonry as: “A building stone manufactured from portland cement concrete precast and used as a trim, veneer or facing on or in buildings or structures.” 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 cast stone?
In this corpus the term is used across 3 chapters, led by Wall Construction in the IRC 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 the definition of cast stone?
In the 2009 I-Codes hosted here it is a defined term rather than a description. The IBC 2009 states, in Masonry: “A building stone manufactured from portland cement concrete precast and used as a trim, veneer or facing on or in buildings or structures.” It is defined in IBC 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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