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Chapter 14 — EXTERIOR WALLS

Section 1412 — SOFFITS AND FASCIAS AT ROOF OVERHANGS

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.

1412.1 General.

Soffits and fascias at roof overhangs shall be designed and constructed in accordance with the applicable provisions of this section.

1412.2 General wind requirements.

Soffits and fascias shall be capable of resisting the component and cladding loads for walls determined in accordance with Chapter 16 using an effective wind area of 10 square feet (0.93 m [2] ).

1412.3 Vinyl and aluminum soffit panels.

Vinyl and aluminum soffit panels shall comply with Section 1412.2, shall be installed using fasteners specified by the manufacturer and shall be fastened at both ends to a supporting component such as a nailing strip, fascia or subfascia component in accordance with Figure 1412.3(1). Where the unsupported span of soffit panels is greater than 12 inches (406 mm) and the design wind pressure is greater than 30 psf (1.44 kN/m [2] ) or the unsupported span of soffit panels is greater than 16 inches (406 mm) and the wind pressure is 30 psf (1.44 kN/m [2] ) or less, intermediate nailing strips shall be provided in accordance with Figure 1412.3(2). Vinyl and aluminum soffit panels shall be installed in accordance with the manufacturer’s installation instructions.

FIGURE 1412.3(1)—SINGLE-SPAN VINYL OR ALUMINUM SOFFIT PANEL SUPPORT

For SI: 1 inch = 25.4 mm.

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

EXTERIOR WALLS

FIGURE 1412.3(2)—DOUBLE-SPAN VINYL OR ALUMINUM SOFFIT PANEL SUPPORT

For SI: 1 inch = 25.4 mm.

1412.4 Fiber-cement soffit panels.

Fiber-cement soffit panels shall comply with Section 1412.2, shall be not less than [1] / 4 inch (6.4 mm) in thickness and shall comply with the requirements of ASTM C1186, Type A, minimum Grade II, or ISO 8336, Category A, minimum Class 2. Panel joints shall occur over framing or over wood structural panel sheathing. Soffit panels shall be installed with spans and fasteners in accordance with the manufacturer’s installation instructions.

1412.5 Hardboard soffit panels.

Hardboard soffit panels shall comply with Section 1412.2 and shall be not less than [7] / 16 inch (11.11 mm) in thickness and fastened to framing or nailing strips to meet the required design wind pressures. Where the design wind pressure is 30 pounds per square foot (1.44 kN/m [2] ) or less, hardboard soffit panels are permitted to be attached to wood framing with 2 [1] / 2 -inch by 0.113-inch (64 mm by 2.9 mm) siding nails spaced not more than 6 inches (152 mm) on center at panel edges and 12 inches (305 mm) on center at intermediate supports. Soffit panels shall be installed with spans and fasteners in accordance with the manufacturer’s installation instructions.

1412.6 Wood structural panel soffit.

Wood structural panel soffits shall comply with Section 1412.2 and shall have minimum panel performance category of [3] / 8 . Wood structural panel soffits are permitted to be attached to wood framing in accordance with Table 1412.6.

TABLE 1412.6—PRESCRIPTIVE ALTERNATE FOR WOOD STRUCTURAL PANEL SOFFITb, c, d, e

MAXIMUM
DESIGN
PRESSURE
(± psf)		 MINIMUM PANEL
SPAN RATING		 MINIMUM PANEL
PERFORMANCE
CATEGORY		 NAIL TYPE AND SIZE FASTENERa SPACING ALONG EDGES
AND INTERMEDIATE SUPPORTS		 FASTENERa SPACING ALONG EDGES
AND INTERMEDIATE SUPPORTS
MAXIMUM
DESIGN
PRESSURE
(± psf)		 MINIMUM PANEL
SPAN RATING		 MINIMUM PANEL
PERFORMANCE
CATEGORY		 NAIL TYPE AND SIZE Galvanized steel Stainless steel
30 24/0 3/8 6d box
(2″ × 0.099″ × 0.266″ head diameter)		 6f 4
40 24/0 3/8 6d box
(2″ × 0.099″ × 0.266″ head diameter)		 6 4
50 24/0 3/8 6d box
(2″ × 0.099″ × 0.266″ head diameter)		 4 4
50 24/0 3/8 8d common
(21/2″ × 0.131″ × 0.281″ head diameter)		 6 6
60 24/0 3/8 6d box
(2″ × 0.099″ × 0.266″ head diameter)		 4 3
60 24/0 3/8 8d common
(21/2″ × 0.131″ × 0.281″ head diameter)		 6 4
70 24/16 7/16 8d common
(21/2″ × 0.131″ × 0.281″ head diameter)		 4 4
70 24/16 7/16 10d box
(3″ × 0.128″ × 0.312″ head diameter)		 6 4

14-22 2025 CALIFORNIA BUILDING CODE

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

EXTERIOR WALLS

TABLE 1412.6—PRESCRIPTIVE ALTERNATE FOR WOOD STRUCTURAL PANEL SOFFITb, c, d, e—continued

MAXIMUM
DESIGN
PRESSURE
(± psf)		 MINIMUM PANEL
SPAN RATING		 MINIMUM PANEL
PERFORMANCE
CATEGORY		 NAIL TYPE AND SIZE FASTENERa SPACING ALONG EDGES
AND INTERMEDIATE SUPPORTS		 FASTENERa SPACING ALONG EDGES
AND INTERMEDIATE SUPPORTS
MAXIMUM
DESIGN
PRESSURE
(± psf)		 MINIMUM PANEL
SPAN RATING		 MINIMUM PANEL
PERFORMANCE
CATEGORY		 NAIL TYPE AND SIZE Galvanized steel Stainless steel
80 24/16 7/16 8d common
(21/2″ × 0.131″ × 0.281″ head diameter)		 4 4
80 24/16 7/16 10d box
(3″ × 0.128″ × 0.312″ head diameter)		 6 4
90 32/16 15/32 8d common
(21/2″ × 0.131″ × 0.281″ head diameter)		 4 3
90 32/16 15/32 10d box
(3″ × 0.128″ × 0.312″ head diameter)		 6 4
For SI: 1 inch = 25.4 mm.
a. Fasteners shall comply with Section 1412.6.
b. Maximum spacing of soffit framing members shall not exceed 24 inches (610 mm).
c. Wood structural panels shall be of an exterior exposure grade.
d. Wood structural panels shall be installed with strength axis perpendicular to supports with a minimum of two continuous spans.
e. Wood structural panels shall be attached to soffit framing members with specific gravity of at least 0.42. Framing members shall be minimum 2″ x 3″ nominal with the larger
dimension in the cross section aligning with the length of fasteners to provide sufficient embedment depths.
f. Spacing at intermediate supports is permitted to be 12 inches on center.

1412.7 Aluminum fascia.

Aluminum fascia shall comply with Section 1412.2 and shall be not less than 0.019 inches (0.48 mm) in thickness and installed in accordance with manufacturer’s instructions. Aluminum fascia shall be attached to wood frame construc tion in accordance with Section 1412.7.1 or 1412.7.2.

1412.7.1 Fascia installation where the design wind pressure is 30 psf (1.44 kN/m [2] ) or less. Where the design wind pressure is 30 pounds per square foot (1.44 kN/m [2] ) or less, aluminum fascia shall be a attached with one finish nail (1 [1] / 4 inches × 0.057 inch × 0.177 inch head diameter) (32 mm × 1.4 mm × 4.5 mm) in the return leg spaced not greater than 24 inches (610 mm) on center, and the fascia shall be inserted under the drip edge with not less than 1 inch (25 mm) of fascia material covered by the drip edge. Where the fascia cannot be inserted under the drip edge, the top edge of the fascia shall be secured using one finish nail (1 [1] / 4 inches × 0.057 inch × 0.177 inch head diameter) (32 mm × 1.4 mm × 4.5 mm) located not more than 1 inch (25 mm) below the drip edge and spaced not greater than 24 inches (610 mm) on center. 1412.7.2 Fascia installation where the design wind pressure exceeds 30 psf (1.44 kN/m [2] ). Where the design wind pressure is greater than 30 pounds per square foot (1.44 kN/m [2] ), aluminum fascia shall be attached with one finish nail (1 [1] / 4 inches × 0.057 inch × 0.177 inch head diameter) (32 mm × 1.4 mm × 4.5 mm) in the return leg spaced a maximum of 16 inches (406 mm) on center and one finish nail located not greater than 1 inch (25 mm) below the drip edge spaced a maximum of 16 inches (406 mm) on center. As an alternative, the top edge of the fascia is permitted to be secured using utility trim installed beneath the drip edge with snap locks punched into the fascia spaced not greater than 6 inches (152 mm) on center.

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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
    Overview
    1. Section 1401 — GENERAL
    2. Section 1402 — PERFORMANCE REQUIREMENTS
    3. Section 1403 — MATERIALS
    4. Section 1404 — INSTALLATION OF WALL COVERINGS
    5. Section 1405 — COMBUSTIBLE MATERIALS ON THE EXTERIOR SIDE OF E…
    6. Section 1406 — METAL COMPOSITE MATERIAL (MCM)
    7. Section 1407 — EXTERIOR INSULATION AND FINISH SYSTEMS (EIFS)
    8. Section 1408 — HIGH-PRESSURE DECORATIVE EXTERIOR-GRADE COMPACT…
    9. Section 1409 — INSULATED METAL PANEL (IMP)
    10. Section 1410 — PLASTIC COMPOSITE DECKING
    11. Section 1411 — BUILDING-INTEGRATED PHOTOVOLTAIC (BIPV) SYSTEMS…
    12. Section 1412 — SOFFITS AND FASCIAS AT ROOF OVERHANGS
    13. Section 1413 — [DSA-SS & DSA-SS/CC, OSHPD 1, 1R, 2, 4 & 5] ADD…
  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
  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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