CBC · California Building Code

What are the CBC requirements for EIFS and conditions where EIFS testing is accepted?

Under the CBC, EIFS must meet ASTM E2568 and be installed per manufacturer instructions; when EIFS is used on framed Type V residential walls it must be the “EIFS with drainage” type, which must demonstrate at least 90% average drainage efficiency per ASTM E2273 and use a WRB meeting § 1403.2 or ASTM E2570. Special inspections are generally required unless the installation qualifies for the limited exceptions in § 1705.17.

Ask a question free See coverage

Last reviewed: July 5, 2026

What the code requires — 2-4 sentences

The CBC requires exterior insulation and finish systems (EIFS) to meet the performance characteristics of ASTM E2568 and to be designed and constructed to resist wind and rain per Chapter 14 and manufacturer instructions (see § 1407.2 and § 1407.4) . Where EIFS is installed as an EIFS with drainage, it must demonstrate an average minimum drainage efficiency of 90% when tested in accordance with ASTM E2273; EIFS with drainage is mandatory on framed walls of Type V construction for Group R1–R4 occupancies (§ 1407.4.1) . Additional requirements cover the water‑resistive barrier, installation, exterior wall assembly compliance, and special inspections (§ 1407.4.1.1, § 1407.5, § 1407.6, § 1407.7) .

Requirements in detail

Scope and baseline performance

  • EIFS materials and assemblies must meet the ASTM E2568 performance characteristics (§ 1407.2) .
  • EIFS must be designed and constructed to resist wind and rain in accordance with § 1402 and manufacturer instructions (§ 1407.4) .

EIFS with drainage — testing and where required

  • Drainage efficiency requirement: average minimum 90% when tested per ASTM E2273 (§ 1407.4.1) .
  • Where required: EIFS with drainage is required on framed walls of Type V construction for Group R1, R2, R3, and R4 occupancies (§ 1407.4.1) .

Water‑resistive barrier (WRB)

  • For EIFS with drainage, the WRB must comply with § 1403.2 or ASTM E2570; WRB location and application requirements are tied to that compliance (§ 1407.4.1.1) .

Installation and assemblies

  • Install EIFS (both common EIFS and EIFS with drainage) in accordance with the manufacturer's instructions (§ 1407.6) .
  • Exterior wall assemblies containing EIFS must also meet the requirements of § 2603.5 when applicable (§ 1407.5) .

Special inspections

  • EIFS installations are subject to the special inspection provisions identified in § 1704.2 and § 1705.17 (§ 1407.7) . (See Exceptions and special cases below for when special inspection may not be required.)

Decision‑relevant dimensions and values

Requirement / dimension Decision‑relevant value When it applies Code Reference
EIFS performance standard ASTM E2568 All EIFS applications § 1407.2
Drainage efficiency (EIFS with drainage) ≥ 90% average (ASTM E2273) Required on framed Type V walls, Group R1–R4; acceptance testing method specified § 1407.4.1
Water‑resistive barrier compliance § 1403.2 or ASTM E2570 For EIFS with drainage § 1407.4.1.1
Installation standard Manufacturer’s instructions All EIFS installations § 1407.6
Exterior wall assembly compliance See § 2603.5 Exterior walls of any height with EIFS § 1407.5
Special inspection required? Yes, per § 1705.17 (with exceptions) EIFS installations generally § 1407.7 and § 1705.17

Exceptions & special cases

  • Special inspections: while EIFS installations generally require special inspection under § 1705.17, that section includes exceptions — special inspections are not required for EIFS installed over a WRB with a means of draining moisture to the exterior, nor for EIFS installed over masonry or concrete walls (§ 1705.17, exceptions) .
  • Substrate exceptions: where EIFS (non‑drainage EIFS) is limited to concrete or masonry substrates per the residential code language; consult § 1407 together with the residential code for residential‑specific limits (the CBC requires EIFS to comply with § 1407 but the CRC provides additional substrate limits) .
  • Fire and combustible‑component interactions: exterior walls with EIFS must also satisfy related fire‑performance provisions (e.g., § 1402 series and any NFPA 285 testing where required) — verify compatibility with Chapter 14 and Section 2603 when foam plastics or combustible WRBs are present (§ 1402.5.3, § 1407.5) .

Common mistakes

  • Treating "EIFS" and "EIFS with drainage" as interchangeable — only EIFS with drainage has the ASTM E2273 drainage‑efficiency test and 90% requirement (§ 1407.4.1) .
  • Omitting the required WRB standard for drained assemblies — EIFS with drainage requires a WRB complying with § 1403.2 or ASTM E2570 (§ 1407.4.1.1) .
  • Relying solely on ASTM E2568 product certification without verifying drainage efficiency testing where drainage is required (§ 1407.2 and § 1407.4.1) .
  • Failing to follow the manufacturer’s installation instructions — the CBC explicitly mandates installation per the manufacturer (§ 1407.6) .
  • Forgetting special inspection requirements (or the exceptions) — check § 1705.17 to determine whether a particular EIFS installation needs special inspection (§ 1407.7) .

Worked example — applying the rule with numbers

Scenario: A 3‑story (Type V, wood frame) apartment building of Group R‑2 uses EIFS on its framed exterior walls.

  1. Because the building is Type V and Group R‑2, the CBC requires EIFS with drainage on the framed walls; therefore the installer must provide an EIFS with drainage assembly (§ 1407.4.1) .
  2. The EIFS with drainage product must demonstrate an average drainage efficiency of at least 90% per ASTM E2273. The project submittal should include the ASTM E2273 test report showing ≥ 90% average drainage efficiency (§ 1407.4.1) .
  3. The water‑resistive barrier under the EIFS with drainage must comply with § 1403.2 or be shown to meet ASTM E2570; include WRB test/certification or cite compliance to § 1403.2 in submittal documentation (§ 1407.4.1.1) .
  4. Installation must follow the EIFS manufacturer’s instructions; the inspector will verify field installation per those instructions (§ 1407.6) .
  5. Special inspection: because EIFS installations generally require special inspection (per § 1705.17), arrange for an approved special inspector unless the installation meets an exception (for example, if installed over a WRB with a means of draining moisture to the exterior or over concrete/masonry) (§ 1407.7 and § 1705.17) .

Related provisions

  • § 1407.2 — EIFS performance (ASTM E2568)
  • § 1407.4 — Weather resistance (referenced requirement to resist wind and rain and to § 1402)
  • § 1407.4.1 — EIFS with drainage (90% drainage efficiency, required on Type V framed Group R1–R4 walls)
  • § 1407.4.1.1 — Water‑resistive barrier requirements for EIFS with drainage (§ 1403.2 or ASTM E2570)
  • § 1407.5 — Exterior wall assemblies containing EIFS must comply with § 2603.5
  • § 1407.6 — Installation must follow the manufacturer’s instructions
  • § 1407.7 — EIFS installations and special‑inspection cross‑references to § 1704.2 and § 1705.17
  • § 1705.17 — Special inspections required for EIFS, with listed exceptions (WRB/drainage or masonry/concrete substrates)
  • § 1402 (series) — Weather‑resistance and vertical/lateral flame propagation provisions that interact with EIFS requirements (see § 1402.5.3)

Code references

Grounded in the retrieved California Building Code — click a citation to read the verbatim passage:

  • CBC § 1407.4.1 High relevance — show source text

    1407.4.1 EIFS with drainage. EIFS with drainage shall have an average minimum drainage efficiency of 90 percent when tested in accordance the requirements of ASTM E2273 and is required on framed walls of Type V construction, Group R1, R2, R3 and R4 occupancies.

    1407.4.1.1 Water-resistive barrier. For EIFS with drainage, the water-resistive barrier shall comply with Section 1403.2 or ASTM E2570.

    1407.5 Exterior walls of buildings of any height. Exterior wall assemblies containing an EIFS exterior wall covering shall comply with Section 2603.5.

    1407.6 Installation. Installation of the EIFS and EIFS with drainage shall be in accordance with the EIFS manufacturer’s instructions.

    1407.7 Special inspections. EIFS installations shall comply with the provisions of Sections 1704.2 and 1705.17.

    SECTION 1408—HIGH-PRESSURE DECORATIVE EXTERIOR-GRADE COMPACT LAMINATES (HPL)

    1408.1 General. The provisions of this section shall govern the materials, construction and quality of High-Pressure Decorative ExteriorGrade Compact Laminates (HPL) for use as exterior wall coverings in addition to other applicable requirements of Chapters 14 and 16.

    1408.2 Exterior wall covering. HPL used as exterior wall covering or as elements of balconies and similar projections and bay and oriel windows to provide cladding or weather resistance shall comply with Sections 1408.4 through 1408.14.

    1408.3 Architectural trim and embellishments. HPL used as architectural trim or embellishments shall comply with Sections 1408.7 through 1408.14.

    [BS] 1408.4 Structural design. HPL systems shall be designed and constructed to resist wind loads as required by Chapter 16 for components and cladding.

    1408.5 Approval. Results of approved tests or an engineering analysis shall be submitted to the building official to verify compliance with the requirements of Chapter 16 for wind loads.

    1408.6 Weather resistance. HPL 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 instructions.

    14-18 2025 CALIFORNIA BUILDING CODE

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

    EXTERIOR WALLS

    1408.7 Durability. HPL systems shall be constructed of approved materials that maintain the performance characteristics required in Section 1408 for the duration of use.

    1408.8 Fire-resistance rating. Where HPL systems are used on exterior walls required to have a fire-resistance rating in accordance with Section 705, evidence shall be submitted to the building official that the required fire-resistance rating is maintained.

    Exception: HPL systems not containing foam plastic insulation, which are installed on the outer surface of a fire-resistance-rated exterior wall in a manner such that the attachments do not penetrate through the entire exterior wall assembly, shall not be required to comply with this section.

    1408.9 Surface-burning characteristics. Unless otherwise specified, HPL shall have a flame spread index of 75 or less and a smokedeveloped index of 450 or less when tested in the minimum and maximum thicknesses intended for use in accordance with ASTM E84 or UL 723.

  • CBC § 9.2 High relevance — show source text

    R703.9.2 Exterior insulation and finish system (EIFS) with drainage. EIFS with drainage shall comply with the following:

    1. ASTM E2568.

    2. EIFS with drainage shall be required over all wall assemblies with the exception of substrates of concrete or masonry wall assemblies.

    3. EIFS with drainage shall have an average minimum drainage efficiency of 90 percent when tested in accordance with ASTM E2273.

    4. The water-resistive barrier shall comply with Section R703.2 or ASTM E2570.

    5. The water-resistive barrier shall be applied between the EIFS and the wall sheathing.

    6. Flashing of EIFS with drainage shall be provided in accordance with the requirements of Section R703.4.

    7. EIFS with drainage shall be installed in accordance with the manufacturer’s instructions.

    8. EIFS with drainage shall terminate not less than 6 inches (152 mm) above the finished ground level.

    9. Decorative trim shall not be face-nailed through the EIFS with drainage.

    R703.10 Fiber cement siding.

    R703.10.1 Panel siding. Fiber-cement panels shall comply with the requirements of ASTM C1186, Type A, minimum Grade II or ISO 8336, Category A, minimum Class 2. Panels shall be installed with the long dimension either parallel or perpendicular to framing. Vertical and horizontal joints shall occur over framing members and shall be protected with caulking, or with battens or flashing, or be vertical or horizontal shiplap, or otherwise designed to comply with Section R703.1. Panel siding shall be installed with fasteners in accordance with Table R703.3(1) or the approved manufacturer’s instructions.

    R703.10.2 Lap siding. Fiber-cement lap siding having a maximum width of 12 inches (305 mm) shall comply with the requirements of ASTM C1186, Type A, minimum Grade II or ISO 8336, Category A, minimum Class 2. Lap siding shall be lapped a minimum of 1 [1] / 4 inches (32 mm) and lap siding not having tongue-and-groove end joints shall have the ends protected with caulking, covered with an H-section joint cover, located over a strip of flashing, or shall be designed to comply with Section R703.1. Lap siding courses shall be installed with the fastener heads exposed or concealed, in accordance with Table R703.3(1) or approved manufacturer’s instructions.

    R703.11 Vinyl siding. Vinyl siding shall be certified and labeled as conforming to the requirements of ASTM D3679 by an approved

    agency.

    R703.11.1 Installation. Vinyl siding, insulated vinyl siding and compatible accessories shall be installed in accordance with the manufacturer’s installation instructions.

    R703.11.1.1 Starter strip. The first course of horizontal siding shall be secured using a starter strip as specified in the manufacturer’s installation instructions. See Figure R703.11.1.1(1). Where the first course of siding has to be cut or trimmed, the bottom edge shall be secured with utility trim and snap locks as specified by the manufacturer’s installation instructions.

    2025 CALIFORNIA RESIDENTIAL CODE 7-25

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

    WALL COVERING

    ’FIGURE R703.11.1.1(1)—TYPICAL STARTER STRIP [a]

    a. This figure illustrates typical installation details. See the manufacturer’s installation instructions for actual installation details

  • CBC § 1406.10.3 High relevance — show source text
    1. The MCM is used as elements of balconies and similar projections, architectural trim or embellishments.

    1406.10.3 Full-scale tests. The MCM system shall be tested in accordance with, and comply with, the acceptance criteria of NFPA 285. Such testing shall be performed on the MCM system with the MCM in the maximum thickness intended for use.

    1406.11 Type V construction. MCM shall be permitted to be installed on buildings of Type V construction.

    1406.12 Foam plastic insulation. Where MCM systems are included in an exterior wall assembly containing foam plastic insulation, the exterior wall assembly shall also comply with the requirements of Section 2603.

    1406.13 Labeling. MCM shall be labeled in accordance with Section 1703.5.

    SECTION 1407—EXTERIOR INSULATION AND FINISH SYSTEMS (EIFS)

    1407.1 General. The provisions of this section shall govern the materials, construction and quality of exterior insulation and finish systems (EIFS) for use as exterior wall coverings in addition to other applicable requirements of Chapters 7, 14, 16, 17 and 26.

    1407.2 Performance characteristics. EIFS shall be constructed such that it meets the performance characteristics required in ASTM E2568.

    [BS] 1407.3 Structural design. The underlying structural framing and substrate shall be designed and constructed to resist loads as required by Chapter 16.

    1407.4 Weather resistance. EIFS 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 application instructions.

    1407.4.1 EIFS with drainage. EIFS with drainage shall have an average minimum drainage efficiency of 90 percent when tested in accordance the requirements of ASTM E2273 and is required on framed walls of Type V construction, Group R1, R2, R3 and R4 occupancies.

    1407.4.1.1 Water-resistive barrier. For EIFS with drainage, the water-resistive barrier shall comply with Section 1403.2 or ASTM E2570.

    1407.5 Exterior walls of buildings of any height. Exterior wall assemblies containing an EIFS exterior wall covering shall comply with Section 2603.5.

    1407.6 Installation. Installation of the EIFS and EIFS with drainage shall be in accordance with the EIFS manufacturer’s instructions.

    1407.7 Special inspections. EIFS installations shall comply with the provisions of Sections 1704.2 and 1705.17.

    SECTION 1408—HIGH-PRESSURE DECORATIVE EXTERIOR-GRADE COMPACT LAMINATES (HPL)

    1408.1 General. The provisions of this section shall govern the materials, construction and quality of High-Pressure Decorative ExteriorGrade Compact Laminates (HPL) for use as exterior wall coverings in addition to other applicable requirements of Chapters 14 and 16.

    1408.2 Exterior wall covering. HPL used as exterior wall covering or as elements of balconies and similar projections and bay and oriel windows to provide cladding or weather resistance shall comply with Sections 1408.4 through 1408.14.

    1408.3 Architectural trim and embellishments. HPL used as architectural trim or embellishments shall comply with Sections 1408.7 through 1408.14.

  • CBC § 2.1. High relevance — show source text

    The exterior wall design shall be considered to resist wind-driven rain where the results of testing, in accordance with ASTM E331, indicate that water did not penetrate control joints in the exterior wall, joints at the perimeter of openings or intersections of terminations with dissimilar materials.

    2.1. Exterior wall test assemblies shall include not fewer than one opening, one control joint, one wall/eave interface and one wall sill. Tested openings and penetrations shall be representative of the intended end-use configuration. 2.2. Exterior wall test assemblies shall be not less than 4 feet by 8 feet (1219 mm by 2438 mm) in size. 2.3. Exterior wall test assemblies shall be tested at a minimum differential pressure of 6.24 pounds per square foot (0.297 kN/m [2] ). 2.4. Exterior wall test assemblies shall be subjected to a minimum test exposure duration of 2 hours. 3. Exterior insulation and finish systems (EIFS) complying with Section 1407.4.1.

    1402.2.1 [BSC-CG] See California Green Building Standards Code, Chapter 5, Division 5.4 for additional weather protection requirements.

    [BS] 1402.3 Wind resistance. Exterior walls, exterior wall coverings, exterior soffits and fascias, and the associated openings, shall be designed and constructed to resist safely the superimposed loads required by Chapter 16.

    [BS] 1402.3.1 Attachments through exterior insulation. Where exterior wall coverings are attached to the building structure through exterior continuous insulation, furring and attachments through the exterior insulation shall be designed to resist design loads determined in accordance with Chapter 16, including support of cladding weight as applicable. Exterior wall coverings attached to the building structure through foam plastic insulating sheathing shall comply with the attachment requirements of Section 1404.5.1, 1404.5.2 or 1404.5.3.

    1402.4 Fire resistance. Exterior walls shall be fire-resistance rated as required by other sections of this code with opening protection as required by Chapter 7.

    1402.5 Vertical and lateral flame propagation. Exterior walls on buildings of Type I, II, III and IV construction that contain a combustible exterior wall covering, combustible insulation or a combustible water-resistive barrier shall comply with Sections 1402.5.1 through 1402.5.5, as applicable. Where compliance with NFPA 285 and associated acceptance criteria is required in Sections 1402.5.1 through 1402.5.5, the exterior wall assembly shall be tested in accordance with and comply with the acceptance criteria of NFPA 285.

    2025 CALIFORNIA BUILDING CODE 14-3

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

    EXTERIOR WALLS

    1402.5.1 Combustible water-resistive barrier. Exterior walls containing a combustible water-resistive barrier shall comply with Section 1402.6.

    1402.5.2 Metal composite material (MCM). Exterior walls containing metal composite material (MCM) systems shall comply with Section 1406.

    1402.5.3 Exterior insulation and finish system (EIFS). Exterior walls containing an exterior insulation and finish system (EIFS) shall comply with Section 1407.

  • CBC § 8.5 High relevance — show source text

    R703.8.5 Flashing. Flashing shall be located beneath the first course of masonry above finished ground level above the foundation wall or slab and at other points of support, including structural floors, shelf angles and lintels where masonry veneers are designed in accordance with Section R703.8. See Section R703.4 for additional requirements.

    7-24 2025 CALIFORNIA RESIDENTIAL CODE

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

    WALL COVERING

    R703.8.6 Weepholes. Weepholes shall be provided in the outside wythe of masonry walls at a maximum spacing of 33 inches (838 mm) on center. Weepholes shall be not less than [3] / 16 inch (5 mm) in diameter. Weepholes shall be located immediately above the flashing.

    R703.9 Exterior insulation and finish system (EIFS)/EIFS with drainage. Exterior insulation and finish systems (EIFS) shall comply with this chapter and Section R703.9.1. EIFS with drainage shall comply with this chapter and Section R703.9.2.

    R703.9.1 Exterior insulation and finish systems (EIFS). EIFS shall comply with the following:

    1. ASTM E2568.

    2. EIFS shall be limited to applications over substrates of concrete or masonry wall assemblies.

    3. Flashing of EIFS shall be provided in accordance with the requirements of Section R703.4.

    4. EIFS shall be installed in accordance with the manufacturer’s instructions.

    5. EIFS shall terminate not less than 6 inches (152 mm) above the finished ground level.

    6. Decorative trim shall not be face-nailed through the EIFS.

    R703.9.2 Exterior insulation and finish system (EIFS) with drainage. EIFS with drainage shall comply with the following:

    1. ASTM E2568.

    2. EIFS with drainage shall be required over all wall assemblies with the exception of substrates of concrete or masonry wall assemblies.

    3. EIFS with drainage shall have an average minimum drainage efficiency of 90 percent when tested in accordance with ASTM E2273.

    4. The water-resistive barrier shall comply with Section R703.2 or ASTM E2570.

    5. The water-resistive barrier shall be applied between the EIFS and the wall sheathing.

    6. Flashing of EIFS with drainage shall be provided in accordance with the requirements of Section R703.4.

    7. EIFS with drainage shall be installed in accordance with the manufacturer’s instructions.

    8. EIFS with drainage shall terminate not less than 6 inches (152 mm) above the finished ground level.

    9. Decorative trim shall not be face-nailed through the EIFS with drainage.

    R703.10 Fiber cement siding.

    R703.10.1 Panel siding. Fiber-cement panels shall comply with the requirements of ASTM C1186, Type A, minimum Grade II or ISO 8336, Category A, minimum Class 2. Panels shall be installed with the long dimension either parallel or perpendicular to framing. Vertical and horizontal joints shall occur over framing members and shall be protected with caulking, or with battens or flashing, or be vertical or horizontal shiplap, or otherwise designed to comply with Section R703.1. Panel siding shall be installed with fasteners in accordance with Table R703.3(1) or the approved manufacturer’s instructions.

  • CBC § 1705.16 High relevance — show source text

    [BF] 1705.16 Intumescent fire-resistive materials. Special inspections and tests for intumescent fire-resistive materials applied to structural elements and decks shall be performed in accordance with AWCI 12-B. Special inspections and tests shall be based on the fire-resistance design as designated in the approved construction documents. Special inspections and tests shall be performed during construction. Additional visual inspection shall be performed after the rough installation and, where applicable, prior to the concealment of electrical, automatic sprinkler, mechanical and plumbing systems.

    [BF] 1705.17 Exterior insulation and finish systems (EIFS). Special inspections shall be required for all EIFS applications.

    Exceptions:

    1. Special inspections shall not be required for EIFS applications installed over a water-resistive barrier with a means of draining moisture to the exterior.
    2. Special inspections shall not be required for EIFS applications installed over masonry or concrete walls.

    [BF] 1705.17.1 Water-resistive barrier coating. A water-resistive barrier coating complying with ASTM E2570 requires special inspection of the water-resistive barrier coating where installed over a sheathing substrate.

    17-18 2025 CALIFORNIA BUILDING CODE

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

    SPECIAL INSPECTIONS AND TESTS

    [BF] 1705.18 Fire-resistant penetrations and joints. In high-rise buildings, in buildings assigned to Risk Category III or IV, or in fire areas containing Group R occupancies with an occupant load greater than 250, special inspections for through-penetrations, membrane penetration firestops, fire-resistant joint systems and perimeter fire containment systems that are tested and listed in accordance with Sections 714.4.1.2, 714.5.1.2, 715.3.1 and 715.4 shall be in accordance with Section 1705.18.1 or 1705.18.2.

    [OSHPD 1R, 2 & 5] Buildings assigned to all Risk Categories shall be subject to special inspections for fire-resistant penetrations and joints.

    [BF] 1705.18.1 Penetration firestops. Inspections of penetration firestop systems that are tested and listed in accordance with Sections 714.4.1.2 and 714.5.1.2 shall be conducted by an approved agency in accordance with ASTM E2174.

    [BF] 1705.18.2 Fire-resistant joint systems. Inspection of fire-resistant joint systems that are tested and listed in accordance with Sections 715.3.1 and 715.4 shall be conducted by an approved agency in accordance with ASTM E2393.

    [F] 1705.19 Testing for smoke control. Smoke control systems shall be tested by a special inspector.

    [F] 1705.19.1 Testing scope. The test scope shall be as follows:

    1. During erection of ductwork and prior to concealment for the purposes of leakage testing and recording of device location.

    2. Prior to occupancy and after sufficient completion for the purposes of pressure difference testing, flow measurements and detection and control verification.

    [F] 1705.19.2 Qualifications. Approved agencies for smoke control testing shall have expertise in fire protection engineering, mechanical engineering and certification as air balancers.

  • CBC § 17.1 High relevance — show source text

    [BF] 1705 A .16 Intumescent fire-resistive materials. Special inspections and tests for intumescent fire-resistive materials applied to structural elements and decks shall be performed in accordance with AWCI 12-B. Special inspections and tests shall be based on the fire-resistance design as designated in the approved construction documents. Special inspections and tests shall be performed during construction. Additional visual inspection shall be performed after the rough installation and, where applicable, prior to the concealment of electrical, automatic sprinkler, mechanical and plumbing systems.

    [BF] 1705 A .17 Exterior insulation and finish systems (EIFS). Special inspections shall be required for all EIFS applications.

    Exceptions:

    1. Special inspections shall not be required for EIFS applications installed over a water-resistive barrier with a means of draining moisture to the exterior.
    2. Special inspections shall not be required for EIFS applications installed over masonry or concrete walls.

    [BF] 1705 A .17.1 Water-resistive barrier coating. A water-resistive barrier coating complying with ASTM E2570 requires special inspection of the water-resistive barrier coating where installed over a sheathing substrate.

    [BF] 1705 A .18 Fire-resistant penetrations and joints. In high-rise buildings, in buildings assigned to Risk Category III or IV, or in fire areas containing Group R occupancies with an occupant load greater than 250, special inspections for through-penetrations, membrane penetration firestops, fire-resistant joint systems and perimeter fire containment systems that are tested and listed in accordance with Sections 714.4.1.2, 714.5.1.2, 715.3.1 and 715.4 shall be in accordance with Section 1705 A .18.1 or 1705 A .18.2.

    [DSA SS, DSA-SS/CC] Buildings assigned to Risk Category II, III or IV shall be subject to special inspections for fire-resistant penetrations and joints.

    [BF] 1705 A .18.1 Penetration firestops. Inspections of penetration firestop systems that are tested and listed in accordance with Sections 714.4.1.2 and 714.5.1.2 shall be conducted by an approved agency in accordance with ASTM E2174.

    [BF] 1705 A .18.2 Fire-resistant joint systems. Inspection of fire-resistant joint systems that are tested and listed in accordance with Sections 715.3.1 and 715.4 shall be conducted by an approved agency in accordance with ASTM E2393.

    [F] 1705 A .19 Testing for smoke control. Smoke control systems shall be tested by a special inspector.

    [F] 1705 A .19.1 Testing scope. The test scope shall be as follows:

    1. During erection of ductwork and prior to concealment for the purposes of leakage testing and recording of device location.

    2. Prior to occupancy and after sufficient completion for the purposes of pressure difference testing, flow measurements and detection and control verification.

    [F] 1705 A .19.2 Qualifications. Approved agencies for smoke control testing shall have expertise in fire protection engineering, mechanical engineering and certification as air balancers.

  • CBC § 1406.10 Medium relevance — show source text

    1406.10 Types I, II, III and IV construction. Where installed on buildings of Types I, II, III and IV construction, metal composite material (MCM) shall comply with Sections 1406.10.1 and 1406.10.2 for installations up to 40 feet (12 192 mm) above grade plane. Where installed on buildings of Type I, II, III and IV construction, MCMs and MCM systems shall comply with Sections 1406.10.1 through 1406.10.3, for installations greater than 40 feet (12 192 mm) above grade plane.

    1406.10.1 Surface-burning characteristics. MCM shall have a flame spread index of not more than 25 and a smoke-developed index of not more than 450 when tested in the maximum thickness intended for use in accordance with ASTM E84 or UL 723.

    1406.10.2 Thermal barriers. MCM shall be separated from the interior of a building by an approved thermal barrier consisting of 1 / 2 -inch (12.7 mm) gypsum wallboard or material that is tested in accordance with and meets the acceptance criteria of both the Temperature Transmission Fire Test and the Integrity Fire Test of NFPA 275.

    Exceptions:

    1. The MCM system is specifically approved based on tests conducted in accordance with NFPA 286 and with the acceptance criteria of Section 803.1.1.1, UL 1040 or UL 1715. Such testing shall be performed with the MCM in the maximum thickness intended for use. The MCM system shall include seams, joints and other typical details used in the installation and shall be tested in the manner intended for use.

    2. The MCM is used as elements of balconies and similar projections, architectural trim or embellishments.

    1406.10.3 Full-scale tests. The MCM system shall be tested in accordance with, and comply with, the acceptance criteria of NFPA 285. Such testing shall be performed on the MCM system with the MCM in the maximum thickness intended for use.

    1406.11 Type V construction. MCM shall be permitted to be installed on buildings of Type V construction.

    1406.12 Foam plastic insulation. Where MCM systems are included in an exterior wall assembly containing foam plastic insulation, the exterior wall assembly shall also comply with the requirements of Section 2603.

    1406.13 Labeling. MCM shall be labeled in accordance with Section 1703.5.

    SECTION 1407—EXTERIOR INSULATION AND FINISH SYSTEMS (EIFS)

    1407.1 General. The provisions of this section shall govern the materials, construction and quality of exterior insulation and finish systems (EIFS) for use as exterior wall coverings in addition to other applicable requirements of Chapters 7, 14, 16, 17 and 26.

    1407.2 Performance characteristics. EIFS shall be constructed such that it meets the performance characteristics required in ASTM E2568.

    [BS] 1407.3 Structural design. The underlying structural framing and substrate shall be designed and constructed to resist loads as required by Chapter 16.

    1407.4 Weather resistance. EIFS 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 application instructions.

  • CBC § 15.6 Medium relevance — show source text

    [BF] 1705 A .15.6 Bond strength. The cohesive/adhesive bond strength of the cured SFRM applied to floor, roof and wall assemblies and structural members shall be not less than 150 pounds per square foot (psf) (7.18 kN/m [2] ). The cohesive/adhesive bond strength shall be determined in accordance with the field test specified in ASTM E736 by testing in-place samples of the SFRM selected in accordance with Sections 1705 A .15.6.1 through 1705 A .15.6.3.

    [BF] 1705 A .15.6.1 Floor, roof and wall assemblies. The test samples for determining the cohesive/adhesive bond strength of the SFRM shall be selected from each floor, roof and wall assembly at the rate of not less than one sample for every 2,500 square feet (232 m [2] ) of the sprayed area, or portion thereof, in each story.

    [BF] 1705 A .15.6.2 Structural members. The test samples for determining the cohesive/adhesive bond strength of the SFRM shall be selected from beams, girders, trusses, columns and other structural members at the rate of not less than one sample for each type of structural member for each 2,500 square feet (232 m [2] ) of floor area or portion thereof in each story.

    [BF] 1705 A .15.6.3 Primer, paint and encapsulant bond tests. Bond tests to qualify a primer, paint or encapsulant shall be conducted where the SFRM is applied to a primed, painted or encapsulated surface for which acceptable bond-strength performance between these coatings and the SFRM has not been determined. A bonding agent approved by the SFRM manufacturer shall be applied to a primed, painted or encapsulated surface where the bond strengths are found to be less than required values.

    [BF] 1705 A .16 Intumescent fire-resistive materials. Special inspections and tests for intumescent fire-resistive materials applied to structural elements and decks shall be performed in accordance with AWCI 12-B. Special inspections and tests shall be based on the fire-resistance design as designated in the approved construction documents. Special inspections and tests shall be performed during construction. Additional visual inspection shall be performed after the rough installation and, where applicable, prior to the concealment of electrical, automatic sprinkler, mechanical and plumbing systems.

    [BF] 1705 A .17 Exterior insulation and finish systems (EIFS). Special inspections shall be required for all EIFS applications.

    Exceptions:

    1. Special inspections shall not be required for EIFS applications installed over a water-resistive barrier with a means of draining moisture to the exterior.
    2. Special inspections shall not be required for EIFS applications installed over masonry or concrete walls.

    [BF] 1705 A .17.1 Water-resistive barrier coating. A water-resistive barrier coating complying with ASTM E2570 requires special inspection of the water-resistive barrier coating where installed over a sheathing substrate.

  • CBC § 2303.2 Medium relevance — show source text
    1. Combustible exterior wall coverings shall be limited to 40 feet (12 192 mm) in height above grade plane. Exceptions:
    2. Metal composite material (MCM) systems complying with Section 1406.
    3. Exterior insulation and finish systems (EIFS) complying with Section 1407.
    4. High-pressure decorative exterior-grade compact laminate (HPL) systems complying with Section 1408.
    5. Exterior wall coverings containing foam plastic insulation complying with Section 2603.
    6. Combustible exterior wall coverings constructed of fire-retardant-treated wood complying with Section 2303.2 for exterior installation shall not be limited in wall surface area where the fire separation distance is 5 feet (1524 mm) or less and shall be permitted up to 60 feet (18 288 mm) in height above grade plane regardless of the fire separation distance.
    7. Wood veneers shall comply with Section 1404.6.

    1405.1.1.1 Ignition resistance. Where permitted by Section 1405.1.1, combustible exterior wall coverings shall be tested in accordance with NFPA 268.

    Exceptions:

    1. Wood or wood-based products.
    2. Other combustible materials covered with an exterior weather covering, other than vinyl sidings, included in and complying with the thickness requirements of Table 1404.2.
    3. Aluminum having a minimum thickness of 0.019 inch (0.48 mm).

    1405.1.1.1.1 Fire separation 5 feet or less. Where installed on exterior walls having a fire separation distance of 5 feet (1524 mm) or less, combustible exterior wall coverings shall not exhibit sustained flaming as defined in NFPA 268.

    1405.1.1.1.2 Fire separation greater than 5 feet. For fire separation distances greater than 5 feet (1524 mm), any exterior wall covering shall be permitted that has been exposed to a reduced level of incident radiant heat flux in accordance with the NFPA 268 test method without exhibiting sustained flaming. The minimum fire separation distance required for the exterior wall covering shall be determined from Table 1405.1.1.1.2 based on the maximum tolerable level of incident radiant heat flux that does not cause sustained flaming of the exterior wall covering.

    14-16 2025 CALIFORNIA BUILDING CODE

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

    EXTERIOR WALLS

  • CBC § 14-3 Medium relevance — show source text

    1402 Performance Requirements . . . . . . . . . . . . . . . . . . . . 14-3

    1403 Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-4

    1404 Installation of Wall Coverings. . . . . . . . . . . . . . . . . . . 14-5

    1405 Combustible Materials on the Exterior Side of

    Exterior Walls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-16

    1406 Metal Composite Material (MCM). . . . . . . . . . . . . . . 14-17

    1407 Exterior Insulation and Finish Systems (EIFS). . . . 14-18

    1408 High-Pressure Decorative Exterior-Grade Compact Laminates (HPL). . . . . . . . . . . . . . . . . . . 14-18

    1409 Insulated Metal Panel (IMP) . . . . . . . . . . . . . . . . . . . 14-19

    1410 Plastic Composite Decking . . . . . . . . . . . . . . . . . . . . 14-21 1411 Building-Integrated Photovoltaic (BIPV) Systems for Exterior Wall Coverings and Fenestration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-21

    1412 Soffits and Fascias at Roof Overhangs . . . . . . . . . . 14-21

    1413 [DSA-SS & DSA-SS/CC, OSHPD 1, 1R, 2, 4 & 5] Additional Requirements for Anchored and Adhered Veneer. . . . . . . . . . . . . . 14-23

    CHAPTER 15 ROOF ASSEMBLIES AND ROOFTOP

    STRUCTURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-1

    1501 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-3

    1502 Roof Drainage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-3

    1503 Weather Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-3

    1504 Performance Requirements . . . . . . . . . . . . . . . . . . . . 15-3

    1505 Fire Classification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-5

    1506 Materials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-6

    1507 Requirements for Roof Coverings . . . . . . . . . . . . . . . 15-7

  • CBC § 1402.4 Medium relevance — show source text

    1402.4 Fire resistance. Exterior walls shall be fire-resistance rated as required by other sections of this code with opening protection as required by Chapter 7.

    1402.5 Vertical and lateral flame propagation. Exterior walls on buildings of Type I, II, III and IV construction that contain a combustible exterior wall covering, combustible insulation or a combustible water-resistive barrier shall comply with Sections 1402.5.1 through 1402.5.5, as applicable. Where compliance with NFPA 285 and associated acceptance criteria is required in Sections 1402.5.1 through 1402.5.5, the exterior wall assembly shall be tested in accordance with and comply with the acceptance criteria of NFPA 285.

    2025 CALIFORNIA BUILDING CODE 14-3

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

    EXTERIOR WALLS

    1402.5.1 Combustible water-resistive barrier. Exterior walls containing a combustible water-resistive barrier shall comply with Section 1402.6.

    1402.5.2 Metal composite material (MCM). Exterior walls containing metal composite material (MCM) systems shall comply with Section 1406.

    1402.5.3 Exterior insulation and finish system (EIFS). Exterior walls containing an exterior insulation and finish system (EIFS) shall comply with Section 1407.

    1402.5.4 High-pressure decorative exterior-grade compact laminate (HPL) system. Exterior walls containing a high-pressure decorative exterior-grade compact laminate (HPL) system shall comply with Section 1408.

    1402.5.5 Foam plastic insulation. Exterior walls containing foam plastic insulation shall comply with Section 2603.

    1402.6 Water-resistive barriers. Exterior walls on buildings of Type I, II, III or IV construction that are greater than 40 feet (12 192 mm) in height above grade plane and contain a combustible water-resistive barrier shall be tested in accordance with and comply with the acceptance criteria of NFPA 285.Combustibility shall be determined in accordance with Section 703.3. For the purposes of this section, fenestration products, flashing of fenestration products and water-resistive-barrier flashing and accessories at other locations, including through wall flashings, shall not be considered part of the water-resistive barrier.

    Exceptions:

    1. Exterior walls in which the water-resistive barrier is the only combustible component and the exterior wall has an exterior wall covering of brick, concrete, stone, terra cotta, stucco or steel with minimum thicknesses in accordance with Table 1404.2.

    2. Exterior walls in which the water-resistive barrier is the only combustible component and the water-resistive barrier complies with the following: 2.1 A peak heat release rate of less than 150 kW/m [2], a total heat release of less than 20 MJ/m [2] and an effective heat of combustion of less than 18 MJ/kg when tested on specimens at the thickness intended for use, in accordance with ASTM E1354, in the horizontal orientation and at an incident radiant heat flux of 50 kW/m [2] .

    2.2 A flame spread index of 25 or less and a smoke-developed index of 450 or less as determined in accordance with ASTM E84 or UL 723, with test specimen preparation and mounting in accordance with ASTM E2404.

Frequently asked questions

Is all EIFS required to be “drained” under the CBC?

No. The CBC differentiates EIFS and EIFS with drainage; EIFS with drainage has the specific ASTM E2273 drainage‑efficiency requirement and is explicitly required on framed Type V walls in Group R1–R4 occupancies (§ 1407.4.1) .

What test shows compliance with the CBC drainage requirement?

Drainage efficiency must be tested in accordance with ASTM E2273 and the EIFS with drainage assembly must show an average minimum drainage efficiency of 90% (§ 1407.4.1) .

Do I still need special inspections for EIFS?

Yes, EIFS installations are generally subject to special inspection per § 1705.17, but § 1705.17 lists exceptions (for example, EIFS over a WRB with a means to drain moisture to the exterior or EIFS over masonry or concrete) .

What WRB standard applies under EIFS with drainage?

For EIFS with drainage the water‑resistive barrier must comply with § 1403.2 or ASTM E2570 (§ 1407.4.1.1) .

Who is responsible for installation quality?

The code requires EIFS be installed in accordance with the manufacturer’s instructions; field inspection and any required special inspections verify that compliance (§ 1407.6 and § 1407.7) .

More in California Building Code

Ask about the CBC

Get cited, plain-English answers on the California Building Code for your project — any code section, any scenario.

Start Free Trial

Related in the CBC

What does the CBC require for metal composite material (MCM) exterior systems?

Where are Insulated Metal Panels, HPL, BIPV and soffit/fascia rules located?

Special Exterior Wall Systems & Features

California Building Code