1412 Soffits and Fascias at Roof Overhangs — 2025 California Building Code
California Building Code (Title 24, Part 2) · 2025 edition · updated 2026-09-25 · California
CBSC: official editions, supplements and errata
Italicized text is a California amendment to the model code, as printed in the official publication.
Cite as: 2025 California Building Code (Title 24, Part 2) § 1412 · Effective January 1, 2026 · Official source: Building Standards Commission
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.
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
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.
Explained in plain English
Guides that cite this section.
Get a plain-English answer with a citation back to this text.
Ask AI about this code