Section 1409 — INSULATED METAL PANEL (IMP) — 2025 California Building Code (Title 24, Part 2)

1409.1 General. ¶

1409.1 General. The provisions of this section, in addition to the other applicable requirements of this chapter and Chapter 16, shall govern the materials, construction and quality of insulated metal panels (IMP) for use as exterior walls and exterior wall coverings.

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1409.2 Structural design. ¶

1409.2 Structural design. Structural design of IMP systems shall be in accordance with this section. 1409.2.1 IMP systems used as exterior walls. IMP systems used as exterior walls shall be designed and constructed to resist design loads in accordance with applicable provisions of Chapter 16. 1409.2.2 IMP systems used as exterior wall coverings. IMP systems used as exterior wall covering systems shall be designed and constructed to resist wind loads as required by Section 1609. 1409.2.3 Approval. Results of approved tests or engineering analyses shall be submitted to the building official to…

provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage

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1409.3 Weather resistance. ¶

1409.3 Weather resistance. IMP systems shall comply with Section 1402 and shall be designed and constructed to resist wind and rain in accordance with this section and the manufacturer’s installation instructions.

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1409.4 Durability. ¶

1409.4 Durability. IMP systems shall be constructed of approved materials that maintain the performance characteristics required in Section 1402 for the duration of use.

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1409.5 Fire-resistance rating. ¶

1409.5 Fire-resistance rating. Evidence of the required fire-resistance rating of IMP systems shall be in accordance with this section. on Jul 18, 2025 11:14 AM (CDT) THEREUNDER. EXTERIOR WALLS 1409.5.1 IMP used as exterior walls. In all types of construction where IMP systems are used as exterior walls required to have a fire-resistance rating in accordance with Section 705, evidence shall be submitted to the building official that the wall achieves the required fire-resistance rating. 1409.5.2 IMP used as exterior wall coverings. In all types of construction where IMP systems are used as…

provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use

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1409.6 IMP systems with noncombustible core insulation. ¶

1409.6 IMP systems with noncombustible core insulation. IMP with noncombustible core insulation shall comply with Sections 1409.1 through 1409.5. Combustibility shall be determined in accordance with Section 703.3.

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1409.7 IMP systems with combustible core insulation. ¶

1409.7 IMP systems with combustible core insulation. IMP systems with combustible core insulation shall comply with Sections 1409.1 through 1409.5 and this section. Combustibility shall be determined in accordance with Section 703.3. 1409.7.1 Surface-burning characteristics. Unless otherwise specified in this section, a combustible core 4 inches (102 mm) or less in thickness shall have a flame spread index of 75 or less and a smoke-developed index of 450 or less when tested in the maximum thickness intended for use in accordance with ASTM E84 or UL 723. For thicknesses greater than 4 inches…

provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use

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1409.8 Type V construction. IMP shall be permitted for use in Type V construction. ¶

1409.8 Type V construction. IMP shall be permitted for use in Type V construction.

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1409.9 Labeling. ¶

1409.9 Labeling. Unless otherwise specified, the edge or face of each IMP or package shall bear the label of an approved agency. The label shall contain the manufacturer’s or distributor’s identification, model number, serial number or definitive information describing the product or materials’ performance characteristics and approved agency’s identification. 1409.9.1 Foam plastic core. IMP having a foam plastic core shall be labeled in accordance with Sections 2603.2 and 2603.5.6, as applicable.

provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure compliance use provision permitted lot commission district approval parking minimum height dwelling application requirement review coverage subject setback occupancy development standard accessory yard section structure

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