Earlier editions: 2022
San Francisco Building Inspection Commission Codes Ch. 26 Plastic
San Francisco Building Inspection Commission Codes · 2026-08 edition · updated 2026-09-23 · San Francisco
Cite as: San Francisco Building Inspection Commission Codes Chapter 26 · Text as of 2026-09-23
SECTION 2603 – FOAM PLASTIC INSULATION
2603.3 Revise the first sentence of Exception 3 as follows:
- Foam plastic insulation that is part of a Class A [ ← ]
The arrow represents the location of language that has been deleted by San Francisco from the applicable California Code.
or B [ ← ]
The arrow represents the location of language that has been deleted by San Francisco from the applicable California Code.
, roof-covering assembly provided [ ← ]
The arrow represents the location of language that has been deleted by San Francisco from the applicable California Code.
the assembly with the foam plastic insulation satisfactorily passes NFPA 276 or UL 1256. 2603.4.1.5 Revise this section as follows:
2603.4.1.5 Roofing. A thermal barrier is not required for foam plastic insulation that is part of a Class A, B, or C roof covering assembly that is installed in accordance with the code and the manufacturer’s instructions and is either constructed as described in item 1 or tested as described in Item 2.
1. The roof assembly is separated from the interior of the building by wood structural panel sheathing not less than 0.47 inch (11.9 mm) in thickness bonded with exterior glue, and identified as Exposure 1 with edges supported by blocking, tongue-and-groove joints, other approved type of edge support or an equivalent material.
[ ← ]
The arrow represents the location of language that has been deleted by San Francisco from the applicable California Code.
The assembly with the foam plastic insulation satisfactorily passes NFPA 276 or UL1256. 2603.6 Revise this section as follows:
2603.6 Roofing. Foam plastic insulation meeting the requirements of Sections 2603.2, 2603.3 and 2603.4 shall be permitted as a part of a roof-covering assembly, provided [ ← ]
The arrow represents the location of language that has been deleted by San Francisco from the applicable California Code.
the assembly with the foam plastic insulation is a Class A [ ← ]
The arrow represents the location of language that has been deleted by San Francisco from the applicable California Code.
or B [ ← ]
The arrow represents the location of language that has been deleted by San Francisco from the applicable California Code.
, roofing assembly where tested in accordance with ASTM E108 or UL 790.
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