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Chapter 26 — PLASTIC

Section 2607 — LIGHT-TRANSMITTING PLASTIC WALL PANELS

2025 California Building Code (Title 24, Part 2) · 2025 edition · updated 2026-07-29 · California

Italicized text is a California amendment to the model code, as printed in the official publication.

2607.1 General.

Light-transmitting plastics shall not be used as wall panels in exterior walls in occupancies in Groups A-l, A-2, H, I-2 and I-3. In other groups, light-transmitting plastics shall be permitted to be used as wall panels in exterior walls, provided that the walls are not required to have a fire-resistance rating and the installation conforms to the requirements of this section. Such panels shall be erected and anchored on a foundation, waterproofed or otherwise protected from moisture absorption and sealed with a coat of mastic or other approved waterproof coating. Light-transmitting plastic wall panels shall comply with Section 2606.

2607.2 Installation.

Exterior wall panels installed as provided for herein shall not alter the type of construction classification of the building.

2607.3 Height limitation.

Light-transmitting plastics shall not be installed more than 75 feet (22 860 mm) above grade plane.

2607.4 Area limitation and separation.

The maximum area of a single wall panel and minimum vertical and horizontal separation requirements for exterior light-transmitting plastic wall panels shall be as provided for in Table 2607.4. The maximum percentage of wall area of any story in light-transmitting plastic wall panels shall not exceed that indicated in Table 2607.4 or the percentage of unprotected openings permitted by Section 705.9, whichever is smaller.

Exceptions:

  1. In structures provided with approved flame barriers extending 30 inches (760 mm) beyond the exterior wall in the plane of the floor, a vertical separation is not required at the floor except that provided by the vertical thickness of the flame barrier projection.
  2. Veneers of approved weather-resistant light-transmitting plastics used as exterior siding in buildings of Type V construction in compliance with Section 1405.
  3. The area of light-transmitting plastic wall panels in exterior walls of greenhouses shall be exempt from the area limitations of Table 2607.4 but shall be limited as required for unprotected openings in accordance with Section 705.9.

. 2. Veneers of approved weather-resistant light-transmitting plastics used as exterior siding in buildings of Type V construction in compliance with Section 1405. 3. The area of light-transmitting plastic wall panels in exterior walls of greenhouses shall be exempt from the area limitations of Table 2607.4 but shall be limited as required for unprotected openings in accordance with Section 705.9.

TABLE 2607.4—AREA LIMITATION AND SEPARATION REQUIREMENTS FOR LIGHT-TRANSMITTING PLASTIC WALL PANELSa

FIRE
SEPARATION
DISTANCE
(feet)		 CLASS OF
PLASTIC		 MAXIMUM
PERCENTAGE AREA
OF EXTERIOR WALL IN
PLASTIC WALL
PANELS		 MAXIMUM SINGLE
AREA OF PLASTIC
WALL PANELS
(square feet)		 MINIMUM SEPARATION OF PLASTIC WALL PANELS
(feet)		 MINIMUM SEPARATION OF PLASTIC WALL PANELS
(feet)
FIRE
SEPARATION
DISTANCE
(feet)		 CLASS OF
PLASTIC		 MAXIMUM
PERCENTAGE AREA
OF EXTERIOR WALL IN
PLASTIC WALL
PANELS		 MAXIMUM SINGLE
AREA OF PLASTIC
WALL PANELS
(square feet)		 Vertical Horizontal
Less than 6 — Not Permitted Not Permitted — —
6 or more but less
than 11		 CC1 10 50 8 4
6 or more but less
than 11		 CC2 Not Permitted Not Permitted — —
11 or more but less
than or equal to 30		 CC1 25 90 6 4
11 or more but less
than or equal to 30		 CC2 15 70 8 4
Over 30 CC1 50 Not Limited 3b 0
Over 30 CC2 50 100 6b 3
For SI: 1 foot = 304.8 mm, 1 square foot = 0.0929 m2.
a. For combinations of plastic glazing and plastic wall panel areas permitted, see Section 2607.6.
b. For reductions in vertical separation allowed, see Section 2607.4.

on Jul 18, 2025 11:14 AM (CDT) THEREUNDER.

PLASTIC

2607.5 Automatic sprinkler system.

Where the building is equipped throughout with an automatic sprinkler system in accordance with Section 903.3.1.1, the maximum percentage area of exterior wall in any story in light-transmitting plastic wall panels and the maximum square footage of a single area given in Table 2607.4 shall be increased 100 percent, but the area of light-transmitting plastic wall panels shall not exceed 50 percent of the wall area in any story, or the area permitted by Section 705.9 for unprotected openings, whichever is smaller. These installations shall not be installed more than 75 feet (22 860 mm) above grade plane.

2607.6 Combinations of glazing and wall panels.

Combinations of light-transmitting plastic glazing and light-transmitting plastic wall panels shall be subject to the area, height and percentage limitations and the separation requirements applicable to the class of light-transmitting plastic as prescribed for light-transmitting plastic wall panel installations.

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▸ Contents — 2025 California Building Code (Title 24, Part 2)
2025 California Building Code (Title 24, Part 2)
  1. Chapter 1 — ADMINISTRATION
  2. Chapter 2 — DEFINITIONS
  3. Chapter 3 — OCCUPANCY CLASSIFICATION AND USE
  4. Chapter 4 — SPECIAL DETAILED REQUIREMENTS BASED ON OCCUPANCY A…
  5. Chapter 5 — GENERAL BUILDING HEIGHTS AND AREAS
  6. Chapter 6 — TYPES OF CONSTRUCTION
  7. Chapter 7 — FIRE AND SMOKE PROTECTION FEATURES
  8. Chapter 7A — MATERIALS AND CONSTRUCTION METHODS FOR EXTERIOR W…
  9. Chapter 8 — INTERIOR FINISHES
  10. Chapter 9 — FIRE PROTECTION AND LIFE SAFETY SYSTEMS
  11. Chapter 10 — MEANS OF EGRESS
  12. Chapter 11 — RESERVED
  13. Chapter 11A — HOUSING ACCESSIBILITY
  14. Chapter 11B — ACCESSIBILITY TO PUBLIC BUILDINGS, PUBLIC ACCOMM…
  15. Chapter 12 — INTERIOR ENVIRONMENT
  16. Chapter 13 — ENERGY EFFICIENCY
  17. Chapter 14 — EXTERIOR WALLS
  18. Chapter 15 — ROOF ASSEMBLIES AND ROOFTOP STRUCTURES
  19. Chapter 16 — STRUCTURAL DESIGN
  20. Chapter 16A — STRUCTURAL DESIGN
  21. Chapter 17 — SPECIAL INSPECTIONS AND TESTS
  22. Chapter 17A — SPECIAL INSPECTIONS AND TESTS
  23. Chapter 18 — SOILS AND FOUNDATIONS
  24. Chapter 18A — SOILS AND FOUNDATIONS
  25. Chapter 19 — CONCRETE
  26. Chapter 19A — CONCRETE
  27. Chapter 20 — ALUMINUM
  28. Chapter 21 — MASONRY
  29. Chapter 21A — MASONRY
  30. Chapter 22 — STEEL
  31. Chapter 22A — STEEL
  32. Chapter 23 — WOOD
  33. Chapter 24 — GLASS AND GLAZING
  34. Chapter 25 — GYPSUM PANEL PRODUCTS AND PLASTER
  35. ▸ Chapter 26 — PLASTIC
    Overview
    1. Section 2601 — GENERAL
    2. Section 2602 — FINISH AND TRIM
    3. Section 2603 — FOAM PLASTIC INSULATION
    4. Section 2604 — INTERIOR FINISH AND TRIM
    5. Section 2605 — PLASTIC VENEER
    6. Section 2606 — LIGHT-TRANSMITTING PLASTICS
    7. Section 2607 — LIGHT-TRANSMITTING PLASTIC WALL PANELS
    8. Section 2608 — LIGHT-TRANSMITTING PLASTIC GLAZING
    9. Section 2609 — LIGHT-TRANSMITTING PLASTIC ROOF PANELS
    10. Section 2610 — LIGHT-TRANSMITTING PLASTIC SKYLIGHT GLAZING
    11. Section 2611 — LIGHT-TRANSMITTING PLASTIC INTERIOR SIGNS
    12. Section 2612 — PLASTIC COMPOSITE DECKING
    13. Section 2613 — FIBER-REINFORCED POLYMER
    14. Section 2614 — REFLECTIVE PLASTIC CORE INSULATION
  36. Chapter 27 — ELECTRICAL
  37. Chapter 28 — MECHANICAL SYSTEMS
  38. Chapter 29 — PLUMBING SYSTEMS
  39. Chapter 30 — ELEVATORS AND CONVEYING SYSTEMS
  40. Chapter 31 — SPECIAL CONSTRUCTION
  41. Chapter 31A — SYSTEMS FOR WINDOW CLEANING OR EXTERIOR BUILDING…
  42. Chapter 31B — PUBLIC POOLS
  43. Chapter 31C — RADIATION
  44. Chapter 31D — FOOD ESTABLISHMENTS
  45. Chapter 31F — MARINE OIL TERMINALS
  46. Chapter 32 — ENCROACHMENTS INTO THE PUBLIC RIGHT-OF-WAY
  47. Chapter 33 — SAFEGUARDS DURING CONSTRUCTION
  48. Chapter 34 — RESERVED
  49. Chapter 35 — REFERENCED STANDARDS
  50. Appendix A — EMPLOYEE QUALIFICATIONS
  51. Appendix B — BOARD OF APPEALS
  52. Appendix C — GROUP U—AGRICULTURAL BUILDINGS
  53. Appendix D — FIRE DISTRICTS
  54. Appendix E — RESERVED
  55. Appendix F — RODENTPROOFING
  56. Appendix G — FLOOD-RESISTANT CONSTRUCTION
  57. Appendix H — SIGNS
  58. Appendix I — PATIO COVERS
  59. Appendix J — GRADING
  60. Appendix K — GROUP R-3 AND GROUP R-3.1 OCCUPANCIES PROTECTED B…
  61. Appendix L — EARTHQUAKE RECORDING INSTRUMENTATION
  62. Appendix M — TSUNAMI-GENERATED FLOOD HAZARDS
  63. Appendix N — REPLICABLE BUILDINGS
  64. Appendix O — PERFORMANCE-BASED APPLICATION
  65. Appendix P — SLEEPING LOFTS
  66. Appendix Q — EMERGENCY HOUSING

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