CEBC · California Existing Building Code
What are the requirements for new interior finishes, floor finishes, trim and window fall prevention?
If you replace interior finishes, floors or trim as a Level 1 alteration, the CEBC directs you to meet the California Building Code performance tests (flame spread, smoke, critical radiant flux etc.). If you replace certain residential windows and all listed CEBC conditions are met (operable window, replacement type, low bottom‑of‑opening, 4‑inch sphere passage, and >72 in to grade), you must install ASTM F2090 window‑fall‑prevention devices.
Last reviewed: July 6, 2026
What the code requires — plain English
New interior wall and ceiling finishes installed as part of a Level 1 alteration must meet the California Building Code interior‑finish rules (boldly: § 702.1) and new interior floor finishes must meet the CBC floor‑finish rules (boldly: § 702.2). Newly installed interior trim must meet the CBC trim requirements (boldly: § 702.3). Where certain residential windows are replaced, window‑fall‑prevention devices that meet ASTM F2090 are required when the CEBC triggers apply (boldly: § 702.4) — see the detailed conditions below.
The single most important requirement: when the CEBC requires compliance it references the California Building Code (Chapter 8 and related Sections) for finish, floor and trim performance; for window replacements the CEBC prescribes ASTM F2090 devices when all the replacement conditions are met.
Requirements in detail
1) Interior wall & ceiling finishes (what standard applies)
Newly installed interior wall and ceiling finishes must comply with CBC Chapter 8 performance requirements referenced by CEBC § 702.1. That means materials are classified by test method (NFPA 286 or ASTM E84/UL 723) and limited by flame‑spread and smoke‑development indices or the NFPA 286 acceptance criteria. Key CBC refs: § 803.1.1 (NFPA 286) and § 803.1.2 (ASTM E84 / UL 723).
In plain terms: choose materials with the required test classification for the occupancy or provide the NFPA 286 test evidence specified in CBC Chapter 8.
2) Interior floor finishes (classification, tests, smoke)
New interior floor finish and carpet used as floor finish must comply with CBC/Fire Code floor‑finish rules referenced by CEBC § 702.2. Test standards are ASTM E648 / NFPA 253 (critical radiant flux) and smoke‑density per ASTM E662 (optical density).
Minimum numeric thresholds commonly used:
- Class I = 0.45 W/cm² (critical radiant flux), Class II = 0.22 W/cm². (§ 804.3.1)
- Maximum specific optical density = 450 (ASTM E662) for floor coverings used as required by § 804.3.3.1.
Additional location‑based requirement: stairways, ramps, exits, corridors and spaces open to corridors require a minimum critical radiant flux — often Class I for certain occupancies and Class II for others; an automatic sprinkler system may allow a lower class in some areas (§ 804.3.3.2).
Carpet and carpet+padding must be tested as an assembly and identified (hang tag or equivalent) and test reports must be available on request (§ 804.3.2).
3) Interior trim (combustibility, foam plastics, limits)
Newly installed interior trim must comply with CBC trim rules referenced by CEBC § 702.3 (CBC Section 806). For non‑foam trim the code requires minimum flame‑spread/smoke indices (Class C or higher depending on occupancy); combustible trim (other than handrails/guardrails) is limited to no more than 10% of the specific wall or ceiling area to which it is attached (§ 806.6).
Foam plastic trim has specific dimensional and performance limits:
- Minimum density = 20 pcf (320 kg/m³). (§ 2604.2.1)
- Maximum thickness = 1/2 inch (12.7 mm) and maximum width = 8 inches (203–204 mm). (§ 2604.2.2)
- Area limit = not more than 10% of the specific wall or ceiling area. (§ 2604.2.3)
- Flame spread index ≤ 75 (ASTM E84/UL723) for foam trim (smoke developed index not limited) unless the trim has passed NFPA 286 acceptance (§ 2604.2.4 and § 803.1.1.1).
Where a floor‑wall base is 6 inches (152 mm) or less in height it must meet floor‑finish testing requirements and be at least Class II (or Class I where Class I floor finish is required) (§ 806.7).
4) Window fall prevention (when required for replacement windows)
- The CEBC window rule is § 702.4 (bold). It requires installation of window opening control devices or other window‑fall‑prevention devices complying with ASTM F2090 when an existing window is replaced and ALL the listed conditions apply. The CEBC text spells the conditions out precisely.
Key CEBC conditions (all must be true to trigger the device requirement):
- The replacement window is operable. (§ 702.4.1)
- The replacement includes either sash+frame OR sash only where the existing frame remains. (§ 702.4.2)
- The bottom of the clear opening is below the height thresholds:
- less than 36 inches (915 mm) above finished floor in Group R‑2 or R‑3 dwelling units, OR (§ 702.4.3.1)
- less than 24 inches (610 mm) above finished floor in one‑ and two‑family dwellings/townhouses covered by the CRC. (§ 702.4.3.2)
- The window would permit the passage of a 4‑inch‑diameter (102 mm) sphere when fully open. (§ 702.4.4)
- The vertical distance from the bottom of the clear opening to the finished grade or other surface below on the exterior is greater than 72 inches (1829 mm). (§ 702.4.5)
- There is a stated exception: operable windows where the bottom of clear opening is more than 75 feet above finished grade (exterior) and provided with devices that comply with ASTM F2006 are exempt. (§ 702.4 Exception)
Decision‑relevant dimensions & values (quick reference table)
| Item / threshold | Value / limit | Code Reference |
|---|---|---|
| R‑2/R‑3 bottom of clear opening trigger | < 36 in (915 mm) | § 702.4.3.1 |
| One‑ and two‑family bottom of clear opening trigger | < 24 in (610 mm) | § 702.4.3.2 |
| Sphere allowing passage (fall hazard test) | 4‑inch‑diameter (102 mm) | § 702.4.4 |
| External vertical distance below (triggers device) | > 72 in (1829 mm) | § 702.4.5 |
| High‑rise exception height | > 75 ft (22,860 mm) (ASTM F2006 allowed) | § 702.4 Exception |
| Floor finish Class I critical radiant flux | 0.45 W/cm² | § 804.3.1 (ASTM E648 / NFPA 253) |
| Floor finish Class II critical radiant flux | 0.22 W/cm² | § 804.3.1 |
| Floor covering smoke limit (ASTM E662) | ≤ 450 (specific optical density) | § 804.3.3.1 |
| Foam plastic trim minimum density | 20 pcf (320 kg/m³) | § 2604.2.1 |
| Foam plastic trim max thickness | 1/2 in (12.7 mm) | § 2604.2.2 |
| Foam plastic trim max width | 8 in (203–204 mm) | § 2604.2.2 |
| Trim area limitation | ≤ 10% of wall/ceiling area | § 806.6 / § 2604.2.3 |
| Floor‑wall base height | ≤ 6 in (152 mm) tested and Class II (or Class I where required) | § 806.7 |
Exceptions & special cases
- The CEBC explicitly defers finish/trim/floor technical performance to the CBC (Chapter 8) — if Chapter 8 provides an occupancy‑based allowance or exception, that applies via § 702.1–§ 702.3 of the CEBC. (CEBC § 702.1–702.3 referencing CBC Chapter 8.)
- Floor finish exception: “traditional” non‑fiber resilient finishes (wood, vinyl, linoleum, terrazzo) and non‑fiber resilient materials are excepted from some floor‑covering requirements in § 804.3 (see the CBC/Fire Code exception language). Also, a fully sprinklered building may permit Class II where Class I would otherwise be required (§ 804.3.3.2).
- Window exception: windows more than 75 feet above finish grade may be handled using ASTM F2006 devices instead (CEBC § 702.4 exception).
If a relevant CBC section that governs a specific nuance (for example a unique occupancy classification or an alternate tested assembly) is not contained in the CEBC excerpt available, you must check that CBC section directly with the building official — the CEBC text points you to CBC Chapter 8 for these details. The CEBC sections themselves only point to CBC Chapter 8 for performance criteria.
Common mistakes
- Assuming all window replacements require fall‑prevention devices — the CEBC requires them only when all conditions in § 702.4 are met; measure the bottom of clear opening and vertical distance below carefully.
- Forgetting to verify whether a sash‑only replacement (frame left in place) still triggers the requirement — CEBC § 702.4.2 explicitly calls out sash‑only replacements as a trigger when the other conditions apply.
- Using foam trim that exceeds the 20 pcf, 1/2‑inch thick or 8‑inch wide limits, or exceeding 10% area limit. (§ 2604.2 series)
- Failing to obtain manufacturer test data / hang tag for carpets and not testing carpet+padding as an assembly per § 804.3.2.
- Applying corridor/stair floor finish rules (Class I/Class II) incorrectly — the location (corridor, stair, ramp), occupancy and sprinkler status change the required class (§ 804.3.3.2).
Worked example (concrete scenario)
Scenario: You’re replacing a second‑floor operable window in an existing Group R‑2 apartment. The replacement is sash and frame. The bottom of the clear opening measures 30 inches above the finished floor; when fully open the opening would allow passage of a 4‑inch sphere; the exterior grade below the window is 9 feet (108 inches) below the bottom of the clear opening.
Step‑through using CEBC § 702.4:
- Is the window operable? Yes. (§ 702.4.1)
- Does the replacement include sash + frame? Yes. (§ 702.4.2.1)
- Is the bottom of the clear opening < 36 in for R‑2? Yes — 30 in < 36 in. (§ 702.4.3.1)
- Will it allow a 4‑inch sphere? Yes. (§ 702.4.4)
- Is the vertical distance to grade > 72 in? Yes — 108 in > 72 in. (§ 702.4.5)
Conclusion: All CEBC conditions are met, so the replacement window must be provided with a window opening control device or other fall‑prevention device complying with ASTM F2090 (per CEBC § 702.4).
Related provisions (CEBC / CBC references)
- § 702.1 (New interior finishes — CEBC) — delegates to CBC Chapter 8.
- § 702.2 (New interior floor finish — CEBC) — delegates to CBC § 804.
- § 702.3 (New interior trim — CEBC) — delegates to CBC § 806.
- § 702.4 (Window fall prevention — CEBC) — full text and conditions.
- CBC § 803.1.1 / § 803.1.1.1 (NFPA 286 acceptance criteria for wall/ceiling finish).
- CBC § 803.1.2 (ASTM E84 / UL 723 flame spread / smoke classes).
- Fire/CBC § 804.3.1 / § 804.3.3.1 / § 804.3.3.2 (floor finish testing, critical radiant flux, smoke limits, sprinkler exceptions).
- CBC § 806.6 / § 806.7 (trim combustibility limits; floor‑wall base requirement).
- CBC § 2604.2 (foam plastic trim density, thickness, width, area, flame spread).
(If you need a direct excerpt of any of the CBC Chapter 8 test criteria or ASTM references called out by the CEBC, I can pull the exact CBC language for the specific § you want to inspect.)
Code references
Grounded in the retrieved California Existing Building Code — click a citation to read the verbatim passage:
CEBC § 701.1 High relevance — show source text
701.1 Scope. Level 1 alterations as described in Section 602 shall comply with the requirements of this chapter. Alterations to historic buildings and structures shall comply with Part 8, Title 24, C.C.R.
701.2 Conformance. An existing building or portion thereof shall not be altered such that the building becomes less safe than its existing condition.
Exception: Where the current level of safety or sanitation is proposed to be reduced, the portion altered shall conform to the requirements of the California Building Code .
[BS] 701.3 Flood hazard areas. In flood hazard areas, alterations that constitute substantial improvement shall require that the building comply with Section 1612 of the California Building Code, or Section R306 of the California Residential Code, as applicable.
SECTION 702—BUILDING ELEMENTS AND MATERIALS
702.1 Interior finishes. Newly installed interior wall and ceiling finishes shall comply with Chapter 8 of the California Building Code .
702.2 Interior floor finish. New interior floor finish, including new carpeting used as an interior floor finish material, shall comply with Section 804 of the California Building Code .
702.3 Interior trim. Newly installed interior trim materials shall comply with Section 806 of the California Building Code .
702.4 Window fall prevention. In Group R-2 or R-3 buildings containing dwelling units and one- and two-family dwellings and townhouses regulated by the California Residential Code, window opening control devices or other window fall prevention devices complying with ASTM F2090 shall be installed where an existing window is replaced and where all of the following apply to the replacement window:
- The window is operable.
- One of the following applies: 2.1. The window replacement includes replacement of the sash and frame. 2.2. The window replacement includes the sash only where the existing frame remains.
- One of the following applies: 3.1. In Group R-2 or R-3 buildings containing dwelling units, the bottom of the clear opening of the window opening is at a height less than 36 inches (915 mm) above the finished floor. 3.2. In one- and two-family dwellings and townhouses regulated by the California Residential Code, the bottom of the clear opening of the window opening is at a height less than 24 inches (610 mm) above the finished floor.
- The window will permit openings that will allow passage of a 4-inch-diameter (102 mm) sphere when the window is in its largest opened position.
- The vertical distance from the bottom of the clear opening of the window opening to the finished grade or other surface below, on the exterior of the building, is greater than 72 inches (1829 mm).
Exception: Operable windows where the bottom of the clear opening of the window opening is located more than 75 feet (22 860 mm) above the finished grade or other surface below, on the exterior of the room, space or building, and that are provided with window fall prevention devices that comply with ASTM F2006.
702.5 Replacement window for emergency escape and rescue openings. Where windows are required to provide emergency escape and rescue openings in Group R-2 and R-3 occupancies and one- and two-family dwellings and townhouses regulated by the California Residential Code, replacement windows shall be exempt from the requirements of Section 1031.3 of the California Building Code and Section R310.2 of the California Residential Code, provided that the replacement window meets the following conditions: 1.
CEBC § 2.2 High relevance — show source text
2.2_|||X|||||||||||||||||||||| |703.3|||X|||||||||||||||||||||| |704.3||||†|†||||||||||||||||||||
The state agency does not adopt sections identified with the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.
2025 CALIFORNIA EXISTING BUILDING CODE 7-1
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
7-2 2025 CALIFORNIA EXISTING BUILDING CODE
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
7 ALTERATIONS—LEVEL 1
User notes:
About this chapter: Chapter 7 provides the technical requirements for those existing buildings that undergo Level 1 alterations as described in Section 603, which includes replacement or covering of existing materials, elements, equipment or fixtures using new materials for the same purpose. This chapter, similar to other chapters of this code, covers all building-related subjects, such as structural, mechanical, plumbing, electrical and accessibility as well as the fire and life safety issues when the alterations are classified as Level 1. The purpose of this chapter is to provide detailed requirements and provisions to identify the required improvements in the existing building elements, building spaces and building structural system. This chapter is distinguished from Chapters 8 and 9 by involving only replacement of building components with new components. In contrast, Level 2 alterations involve more space reconfiguration, and Level 3 alterations involve more extensive space reconfiguration, exceeding 50 percent of the building area.
SECTION 701—GENERAL
701.1 Scope. Level 1 alterations as described in Section 602 shall comply with the requirements of this chapter. Alterations to historic buildings and structures shall comply with Part 8, Title 24, C.C.R.
701.2 Conformance. An existing building or portion thereof shall not be altered such that the building becomes less safe than its existing condition.
Exception: Where the current level of safety or sanitation is proposed to be reduced, the portion altered shall conform to the requirements of the California Building Code .
[BS] 701.3 Flood hazard areas. In flood hazard areas, alterations that constitute substantial improvement shall require that the building comply with Section 1612 of the California Building Code, or Section R306 of the California Residential Code, as applicable.
SECTION 702—BUILDING ELEMENTS AND MATERIALS
702.1 Interior finishes. Newly installed interior wall and ceiling finishes shall comply with Chapter 8 of the California Building Code .
702.2 Interior floor finish. New interior floor finish, including new carpeting used as an interior floor finish material, shall comply with Section 804 of the California Building Code .
702.3 Interior trim. Newly installed interior trim materials shall comply with Section 806 of the California Building Code .
702.4 Window fall prevention. In Group R-2 or R-3 buildings containing dwelling units and one- and two-family dwellings and townhouses regulated by the California Residential Code, window opening control devices or other window fall prevention devices complying with ASTM F2090 shall be installed where an existing window is replaced and where all of the following apply to the replacement window:
- The window is operable.
- One of the following applies: 2.1.
CEBC § 5.5 High relevance — show source text
[BSC-CG] See California Green Building Standards Code, Chapter 5, Division 5.5 for additional finish material pollutant control requirements.
SECTION 802—GENERAL
802.1 Interior wall and ceiling finish. The provisions of Section 803 shall limit the allowable fire performance and smoke development of interior wall and ceiling finish materials based on occupancy classification.
802.2 Interior floor finish. The provisions of Section 804 shall limit the allowable fire performance of interior floor finish materials based on occupancy classification.
[F] 802.3 Decorative materials and trim. Decorative materials and trim shall be restricted by combustibility, fire performance or flame propagation performance criteria in accordance with Section 806.
802.4 Applicability. For buildings in flood hazard areas as established in Section 1612.3, interior finishes, trim and decorative materials below the elevation required by Section 1612 shall be flood-damage-resistant materials.
802.5 Application. Combustible materials shall be permitted to be used as finish for walls, ceilings, floors and other interior surfaces of buildings.
802.6 Windows. Show windows in the exterior walls of the first story above grade plane shall be permitted to be of wood or of unprotected metal framing.
802.7 Foam plastics. Foam plastics shall not be used as interior finish except as provided in Section 803.4. Foam plastics shall not be used as interior trim except as provided in Section 806.6.1 or 2604.2. This section shall apply both to exposed foam plastics and to foam plastics used in conjunction with a textile or vinyl facing or cover.
SECTION 803—WALL AND CEILING FINISHES
803.1 General. Interior wall and ceiling finish materials shall be classified for fire performance and smoke development in accordance with Section 803.1.1 or 803.1.2, except as shown in Sections 803.1.3 through 803.15. Materials tested in accordance with Section 803.1.1 shall not be required to be tested in accordance with Section 803.1.2.
803.1.1 Interior wall and ceiling finish materials tested in accordance with NFPA 286. Interior wall and ceiling finish materials shall be classified in accordance with NFPA 286 and comply with Section 803.1.1.1. Materials complying with Section 803.1.1.1 shall be considered to also comply with the requirements of Class A.
803.1.1.1 Acceptance criteria for NFPA 286. The interior finish shall comply with the following:
During the 40 kW exposure, flames shall not spread to the ceiling.
The flame shall not spread to the outer extremity of the sample on any wall or ceiling.
Flashover, as defined in NFPA 286, shall not occur.
The peak heat release rate throughout the test shall not exceed 800 kW.
The total smoke released throughout the test shall not exceed 1,000 m [2] .
803.1.2 Interior wall and ceiling finish materials tested in accordance with ASTM E84 or UL 723. Interior wall and ceiling finish materials shall be classified in accordance with ASTM E84 or UL 723. Such interior finish materials shall be grouped in the following classes in accordance with their flame spread and smoke-developed indices.
Class A = Flame spread index 0–25; smoke-developed index 0–450.
Class B = Flame spread index 26–75; smoke developed index 0–450.
Class C = Flame spread index 76–200; smoke-developed index 0–450.
CEBC § 803.13 High relevance — show source text
1||X||||||||||||||||||||||| |Table 803.13|||X|||||||||||||||||||||| |804.1|||X|||||||||||||||||||||| |804.4|||X|||||||||||||||||||||| |804.4.1|||X|||||||||||||||||||||| |804.4.2|||X|||||||||||||||||||||| |804.4.3|||X|||||||||||||||||||||| |806.4|||X|||||||||||||||||||||| |806.6|||X||||||||||||||||||||||
The state agency does not adopt sections identified by the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.
2025 CALIFORNIA BUILDING CODE 8-1
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
8-2 2025 CALIFORNIA BUILDING CODE
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
8 INTERIOR FINISHES
User notes:
About this chapter: Chapter 8 contains the performance requirements for controlling fire growth and smoke propagation within buildings by restricting interior finish and decorative materials. The provisions of this chapter require materials used as interior finishes and decorations to meet certain flame spread index or flame propagation criteria and smoke development criteria based on the relative fire hazard associated with the occupancy. The performance of the material is evaluated based on test standards.
SECTION 801—SCOPE
801.1 Scope. The provisions of this chapter shall govern the use of materials used as interior finishes, trim and decorative materials.
[BSC-CG] See California Green Building Standards Code, Chapter 5, Division 5.5 for additional finish material pollutant control requirements.
SECTION 802—GENERAL
802.1 Interior wall and ceiling finish. The provisions of Section 803 shall limit the allowable fire performance and smoke development of interior wall and ceiling finish materials based on occupancy classification.
802.2 Interior floor finish. The provisions of Section 804 shall limit the allowable fire performance of interior floor finish materials based on occupancy classification.
[F] 802.3 Decorative materials and trim. Decorative materials and trim shall be restricted by combustibility, fire performance or flame propagation performance criteria in accordance with Section 806.
802.4 Applicability. For buildings in flood hazard areas as established in Section 1612.3, interior finishes, trim and decorative materials below the elevation required by Section 1612 shall be flood-damage-resistant materials.
802.5 Application. Combustible materials shall be permitted to be used as finish for walls, ceilings, floors and other interior surfaces of buildings.
802.6 Windows. Show windows in the exterior walls of the first story above grade plane shall be permitted to be of wood or of unprotected metal framing.
802.7 Foam plastics. Foam plastics shall not be used as interior finish except as provided in Section 803.4. Foam plastics shall not be used as interior trim except as provided in Section 806.6.1 or 2604.2. This section shall apply both to exposed foam plastics and to foam plastics used in conjunction with a textile or vinyl facing or cover.
SECTION 803—WALL AND CEILING FINISHES
CEBC § 804.1.1 High relevance — show source text
804.1.1 Testing in accordance with NFPA 286. Interior trim material shall be tested in accordance with NFPA 286 and comply with the acceptance criteria in Section 803.1.1.1. Where the interior trim material has been tested as an interior finish in accordance with NFPA 286 and complies with the acceptance criteria in Section 803.1.1.1, it shall not be required to be tested for flame spread index and smoke-developed index in accordance with ASTM E84 or UL 723.
804.1.2 Testing in accordance with ASTM E84 or UL 723. Material, other than foam plastic, used as interior trim shall have minimum Class C flame spread and smoke-developed indices, when tested in accordance with ASTM E84 or UL 723, as described in Section 803.1.2.
804.2 Foam plastic interior trim. Foam plastic used as interior trim shall comply with Sections 804.2.1 through 804.2.4. 804.2.1 Density. The minimum density of the interior trim shall be 20 pounds per cubic foot (320 kg/m [3] ). 804.2.2 Thickness. The maximum thickness of the interior trim shall be [1] / 2 inch (12.7 mm) and the maximum width shall be 8 inches (203 mm).
804.2.3 Area limitation. The interior trim shall not constitute more than 10 percent of the specific wall or ceiling area to which it is attached.
804.2.4 Flame spread. The flame spread index shall not exceed 75 where tested in accordance with ASTM E84 or UL 723. The smoke-developed index shall not be limited.
Exception: Where the interior trim material has been tested as an interior finish in accordance with NFPA 286 and complies with the acceptance criteria in Section 803.1.1.1, it is not required to be tested for flame spread index in accordance with ASTM E84 or UL 723.
804.3 New interior floor finish. New interior floor finish and floor covering materials in new and existing buildings shall comply with Sections 804.3.1 through 804.3.3.2.
Exception: Floor finishes and coverings of a traditional type, such as wood, vinyl, linoleum or terrazzo, and resilient floor covering materials that are not composed of fibers.
804.3.1 Classification. Interior floor finish and floor covering materials required by Section 804.3.3.2 to be of Class I or II materials shall be classified in accordance with ASTM E648 or NFPA 253. The classification referred to herein corresponds to the classifications determined by ASTM E648 or NFPA 253 as follows: Class I, 0.45 watts/cm [2] or greater; Class II, 0.22 watts/cm [2] or greater.
804.3.2 Testing and identification. Interior floor finish and floor covering materials shall be tested by an approved agency in accordance with ASTM E648 or NFPA 253 and identified by a hang tag or other suitable method so as to identify the manufacturer or supplier and style, and shall indicate the interior floor finish or floor covering classification in accordance with Section 804.3.1. Carpet-type floor coverings shall be tested as proposed for use, including underlayment. Test reports confirming the information provided in the manufacturer’s product identification shall be furnished to the fire code official upon request.
CEBC § 2604.1 High relevance — show source text
SECTION 2604—INTERIOR FINISH AND TRIM
2604.1 General. Plastic materials installed as interior finish or trim shall comply with Chapter 8. Foam plastics shall only be installed as interior finish where approved in accordance with the special provisions of Section 2603.9. Foam plastics that are used as interior finish shall meet the flame spread and smoke-developed index requirements for interior finish in accordance with Chapter 8. Foam plastics installed as interior trim shall comply with Section 2604.2. 2604.1.1 Plenums. Foam plastics installed in plenums as interior wall or ceiling finish shall comply with Section 2603.7. Foam plastics installed in plenums as interior trim shall comply with Sections 2604.2 and 2603.7.
[F] 2604.2 Interior trim. Foam plastic used as interior trim shall comply with Sections 2604.2.1 through 2604.2.4.
[F] 2604.2.1 Density. The minimum density of the interior trim shall be 20 pcf (320 kg/m [3] ).
[F] 2604.2.2 Thickness. The maximum thickness of the interior trim shall be [1] / 2 inch (12.7 mm) and the maximum width shall be 8 inches (204 mm).
[F] 2604.2.3 Area limitation. The interior trim shall not constitute more than 10 percent of the specific wall or ceiling areas to which it is attached.
[F] 2604.2.4 Flame spread. The flame spread index shall not exceed 75 where tested in accordance with ASTM E84 or UL 723. The smoke-developed index shall not be limited.
Exception: Where the interior trim material has been tested as an interior finish in accordance with NFPA 286 and complies with the acceptance criteria in Section 803.1.1.1, it shall not be required to be tested for flame spread index in accordance with ASTM E84 or UL 723.
2025 CALIFORNIA BUILDING CODE 26-7
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
PLASTIC
SECTION 2605—PLASTIC VENEER
2605.1 Interior use. Where used within a building, plastic veneer shall comply with the interior finish requirements of Chapter 8.
2605.2 Exterior use. Exterior plastic veneer, other than plastic siding, shall be permitted to be installed on the exterior walls of buildings of any type of construction in accordance with all of the following requirements:
- Plastic veneer shall comply with Section 2606.4.
- Plastic veneer shall not be attached to any exterior wall to a height greater than 50 feet (15 240 mm) above grade.
- Sections of plastic veneer shall not exceed 300 square feet (27.9 m [2] ) in area and shall be separated by not less than 4 feet (1219 mm) vertically.
Exception: The area and separation requirements and the smoke-density limitation are not applicable to plastic veneer applied to buildings constructed of Type VB construction, provided that the walls are not required to have a fire-resistance rating.
2605.3 Plastic siding. Plastic siding shall comply with the requirements of Sections 1403 and 1404.
SECTION 2606—LIGHT-TRANSMITTING PLASTICS
CEBC § 804.3.3 High relevance — show source text
804.3.3 Interior floor finish requirements. New interior floor covering materials shall comply with Sections 804.3.3.1 and 804.3.3.2, and interior floor finish materials shall comply with Section 804.3.1.
804.3.3.1 Test requirement. In all occupancies, interior floor finish and interior floor covering materials shall comply with the requirements of ASTM Standard E648, and having a specific optical density smoke rating not to exceed 450 per ASTM E662. For Group I-3 occupancies and Group I-2 areas where patients are restrained, see Section 804.3.3.3.
804.3.3.2 Minimum critical radiant flux. In all occupancies, new interior floor finish and floor covering materials in enclosures for stairways and ramps, exit passageways, corridors and rooms or spaces not separated from corridors by full-height partitions extending from the floor to the underside of the ceiling shall withstand a minimum critical radiant flux. The minimum critical radiant flux shall be not less than Class I in Groups I-2 and I-3 areas where restraint is not used and R-2.1 and not less than Class II in Groups A, B, E, H, I-4, M, R-1, R-2, R-2.2 and S.
Exception: Where a building is equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1 or 903.3.1.2, Class II materials shall be permitted in any area where Class I materials are required and materials complying with ASTM Standard E648, and having a specific optical density smoke rating not to exceed 450 per ASTM E662 are permitted in any area where Class II materials are required.
For Group I-3 areas occupied by inmates or Group I-2 areas where patients are restrained, see Section 804.3.3.3.
2025 CALIFORNIA FIRE CODE 8-7
on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.
INTERIOR FINISH, DECORATIVE MATERIALS AND FURNISHINGS
804.3.3.3 Group I-2 and Group I-3 floor surfaces. Interior floor finish and floor coverings occupied by inmates or patients whose personal liberties are restrained shall be noncombustible. Carpet or other floor covering materials may be used in areas protected by an automatic sprinkler system installed throughout in accordance with Section 903.3.1.1. Carpet or other floor coverings shall comply with the requirements of ASTM Standard E648; the minimum critical radiant flux shall be not less than Class I and the specific optical density smoke rating shall not exceed 450 per ASTM E662. Carpeting and carpet padding shall be tested as a unit in accordance with floor covering radiant panel test meeting Class 1 and has a critical radiant flux limit of not less than 0.45 watt per centimeter square. The carpeting and padding shall be identified by a hang-tag or other suitable method as to manufacturer and style and shall indicate the classification of the material based on the limits set forth above.
CEBC § 803.1.1.1 High relevance — show source text
Exception: Where the interior trim material has been tested as an interior finish in accordance with NFPA 286 and complies with the acceptance criteria in Section 803.1.1.1, it is not required to be tested for flame spread index in accordance with ASTM E84 or UL 723.
804.3 New interior floor finish. New interior floor finish and floor covering materials in new and existing buildings shall comply with Sections 804.3.1 through 804.3.3.2.
Exception: Floor finishes and coverings of a traditional type, such as wood, vinyl, linoleum or terrazzo, and resilient floor covering materials that are not composed of fibers.
804.3.1 Classification. Interior floor finish and floor covering materials required by Section 804.3.3.2 to be of Class I or II materials shall be classified in accordance with ASTM E648 or NFPA 253. The classification referred to herein corresponds to the classifications determined by ASTM E648 or NFPA 253 as follows: Class I, 0.45 watts/cm [2] or greater; Class II, 0.22 watts/cm [2] or greater.
804.3.2 Testing and identification. Interior floor finish and floor covering materials shall be tested by an approved agency in accordance with ASTM E648 or NFPA 253 and identified by a hang tag or other suitable method so as to identify the manufacturer or supplier and style, and shall indicate the interior floor finish or floor covering classification in accordance with Section 804.3.1. Carpet-type floor coverings shall be tested as proposed for use, including underlayment. Test reports confirming the information provided in the manufacturer’s product identification shall be furnished to the fire code official upon request.
804.3.3 Interior floor finish requirements. New interior floor covering materials shall comply with Sections 804.3.3.1 and 804.3.3.2, and interior floor finish materials shall comply with Section 804.3.1.
804.3.3.1 Test requirement. In all occupancies, interior floor finish and interior floor covering materials shall comply with the requirements of ASTM Standard E648, and having a specific optical density smoke rating not to exceed 450 per ASTM E662. For Group I-3 occupancies and Group I-2 areas where patients are restrained, see Section 804.3.3.3.
804.3.3.2 Minimum critical radiant flux. In all occupancies, new interior floor finish and floor covering materials in enclosures for stairways and ramps, exit passageways, corridors and rooms or spaces not separated from corridors by full-height partitions extending from the floor to the underside of the ceiling shall withstand a minimum critical radiant flux. The minimum critical radiant flux shall be not less than Class I in Groups I-2 and I-3 areas where restraint is not used and R-2.1 and not less than Class II in Groups A, B, E, H, I-4, M, R-1, R-2, R-2.2 and S.
Exception: Where a building is equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1 or 903.3.1.2, Class II materials shall be permitted in any area where Class I materials are required and materials complying with ASTM Standard E648, and having a specific optical density smoke rating not to exceed 450 per ASTM E662 are permitted in any area where Class II materials are required.
CEBC § 7-3 Medium relevance — show source text
702 Building Elements and Materials . . . . . . . . . . . . . . . . . 7-3
703 Fire Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
704 Means of Egress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
705 Reroofing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
706 Structural. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5
707 Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6
708 Energy Conservation. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6
CHAPTER 8 ALTERATIONS—LEVEL 2 . . . . . . . . . . . . . . . . . .8-3
801 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
802 Building Elements and Materials . . . . . . . . . . . . . . . . . 8-3
803 Fire Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
804 Means of Egress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-5
805 Structural. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
806 Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
807 Mechanical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
808 Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
809 Energy Conservation. . . . . . . . . . . . . . . . . . . . . . . . . . . 8-10
CHAPTER 9 ALTERATIONS—LEVEL 3 . . . . . . . . . . . . . . . . . .9-3
901 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3
California Existing Building Code Medium relevance — show source text
2
5
10
15
20|190
182
224
277
325
374|1053
708
692
666
640
616|573
468
457
437
419
400|238
227
279
339
393
448|1379
914
896
866
838
810|750
611
596
570
549
526|326
309
381
457
526
592|1751
1146
1126
1092
1060
1028|927
754
734
702
677
651|473
443
547
646
730
808|2631
1689
1665
1626
1587
1550|1346
1098
1074
1037
1005
973| |30|0
2
5
10
15
20
30|184
175
215
265
312
360
461|1168
823
806
777
750
723
670|647
533
521
501
481
461
426|229
219
269
327
379
433
541|1542
1069
1049
1017
985
955
895|852
698
684
662
638
615
574|312
296
366
440
507
570
704|1971
1346
1324
1287
1251
1216
1147|1056
863
846
821
794
768
720|454
424
524
620
702
780
937|2996
1999
1971
1927
1884
1841
1759|1545
1308
1283
1243
1205
1166
1101| |50|0
2
5CEBC § 5A-3 Medium relevance — show source text
METHOD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5A-3
501A General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5A-3
502A Additions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5A-4
503A Alterations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5A-5
504A Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5A-7
505A Reserved. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5A-7
506A Change of Occupancy. . . . . . . . . . . . . . . . . . . . . . . . . . . .5A-7
CHAPTER 6 CLASSIFICATION OF WORK . . . . . . . . . . . . . . . 6-3
601 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
602 Alteration—Level 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
603 Alteration—Level 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
604 Alteration—Level 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
605 Change of Occupancy. . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
606 Additions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
607 Historic Buildings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
CHAPTER 7 ALTERATIONS—LEVEL 1 . . . . . . . . . . . . . . . . . .7-3
701 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
702 Building Elements and Materials . . . . . . . . . . . . . . . . . 7-3
CEBC § 6-3 Medium relevance — show source text
601 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
602 Alteration—Level 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
603 Alteration—Level 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
604 Alteration—Level 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
605 Change of Occupancy. . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
606 Additions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
607 Historic Buildings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
CHAPTER 7 ALTERATIONS—LEVEL 1 . . . . . . . . . . . . . . . . . .7-3
701 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
702 Building Elements and Materials . . . . . . . . . . . . . . . . . 7-3
703 Fire Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
704 Means of Egress . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
705 Reroofing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
706 Structural. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5
707 Reserved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6
708 Energy Conservation. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6
CHAPTER 8 ALTERATIONS—LEVEL 2 . . . . . . . . . . . . . . . . . .8-3
801 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
802 Building Elements and Materials . . . . . . . . . . . . . . . . . 8-3
Frequently asked questions
Do all window replacements in apartments require a window‑fall‑prevention device?
No. Only when every trigger in § 702.4 applies: the window is operable, the replacement type matches the listed cases (sash+frame or sash only), the bottom of the clear opening is below the numeric threshold for that dwelling type, the opening admits a 4‑inch sphere when open, and the vertical distance below is > 72 in.
What lab evidence do I need for new carpet?
Carpet (and underlayment/padding) must be tested as an assembly to ASTM E648 / NFPA 253 and identified (hang tag or similar). Test reports must be available to the authority having jurisdiction. See § 804.3.2 / § 804.3.3.1.
Can foam trim be used if it’s thicker than 1/2 inch?
Not under the regular foam‑trim limits. Foam trim must meet the dimensional limits (1/2 in thick, 8 in wide) and 20 pcf density unless the material has been tested as interior finish under NFPA 286 and meets those acceptance criteria. See § 2604.2 and § 803.1.1.1.
If my building has sprinklers, can I use a lower‑rated floor finish in corridors?
Possibly. CBC/Fire Code § 804.3.3.2 allows Class II where Class I would otherwise be required in buildings equipped throughout with an approved automatic sprinkler system per the noted sections. Check the exact occupancy and sprinkler coverage.
Where does CEBC point me for actual test methods and numeric values?
The CEBC sections § 702.1–§ 702.3 explicitly require compliance with CBC Chapter 8 and related sections (for floor finishes, § 804). The CEBC text itself references those CBC sections; consult the referenced CBC § (and the listed ASTM/NFPA standards) for test methods and exact numbers.
More in California Existing Building Code
- Administration and Definitions (Scope, enforcement, code official duties, definitions)
- Provisions for All Compliance Methods (general requirements that apply to all compliance options; Chapter 3 / 3A)
- Seismic retrofit and evaluation (Appendix A and seismic provisions/sections for evaluation and retrofit)
- Referenced Standards and Appendices (Chapter 16 and Appendices A–E, Resource A)
- Repairs (Chapter 4 — repair-specific rules for materials, means of egress, structural, MEP, etc.)
- Alterations — Level 1, Level 2, Level 3 (technical requirements for each alteration level; Chapters 7–9)
- Change of Occupancy and Additions (requirements for occupancy changes and additions; Chapters 10–11)
- Compliance Methods — Prescriptive, Work Area, Performance (Chapters 5, 6–11, 13)
- Relocated Buildings (requirements for buildings moved or relocated; Chapter 14)
- Construction Safeguards (site safety, means of egress and life-safety during construction; Chapter 15)
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