Earlier editions: 2022
Chapter 15 — ROOF ASSEMBLIES AND ROOFTOP STRUCTURES
San Francisco Building Inspection Commission Codes § 1502.1 Add a second paragraph as follows
San Francisco Building Inspection Commission Codes · 2026-08 edition · updated 2026-09-23 · San Francisco
Cite as: San Francisco Building Inspection Commission Codes § 1502.1 · Text as of 2026-09-23
All storm- or casual water from roof areas which total more than 200 square feet (18.58 m2 ) shall drain or be conveyed directly to the building drain or storm drain or to an approved alternate location based on approved
geotechnical and engineering design. Such drainage shall not be directed to flow onto adjacent property or over public sidewalks. Building projections not exceeding 12 inches (305 mm) in width are exempt from drainage requirements without area limitations.
SECTION 1505 – FIRE CLASSIFICATION
1505.1 Add the following at the end of the first paragraph:
Class B or better roof coverings shall be used on all buildings.
1505.1 Add the following second exception:
- Detached accessory structures with a roof of less than 200 square feet (18.58 m2 ) may have roof coverings of Class A, B or C.
Table 1505.1 Revise the table as follows:
TABLE 1505.1 – MINIMUM ROOF [ ← ]
The arrow represents the location of language that has been deleted by San Francisco from the applicable California Code.
COVERING CLASSIFICATION FOR TYPES OF CONSTRUCTION
| IA | IB | IIA | IIB | IIIA | IIIB | IV | VA | VB |
|---|---|---|---|---|---|---|---|---|
| B | B | B | [←] | B | [←] | B | B | [←] |
| The arrow represents the location of language that has been deleted by San Francisco from the applicable California Code. B |
SECTION 1507 – REQUIREMENTS FOR ROOF COVERINGS
1507.8.5 Add the following sentence at the end of the paragraph:
Untreated wood shingles shall not be permitted. 1507.9.6 Add the following sentence at the end of the paragraph: Untreated wood shakes shall not be permitted.
SECTION 1511 – ROOF TOP STRUCTURES
1511 Add the following section:
1511.11 Occupied roof decks. Occupiable roof decks may be constructed of wood when the following conditions are met:
The occupied roof deck is less than 500 square feet (46.45 m2 ) in area.
The deck boards are spaced not greater than 1/8 inch (3.2 mm) apart.
Any open space around the perimeter between the deck and the roof surface shall be enclosed to within 1 inch
- (25.4 mm) of the roof surface.
- The decking is constructed of fire-retardant- treated wood approved for exterior use, or 2-inch (50.8 mm)
nominal all heart redwood. Guardrails and fences may be constructed of any material permitted by this code.
- The deck is installed on top of a Class A or B fire-resistive roof assembly. The deck shall not be considered part
of such roof assembly.
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