CWUIC · California Wildland-Urban Interface Code

Wall, Window & Door Assembly Test Methods

This hub explains the CWUIC test methods and referenced standards used to show that exterior walls, windows and doors resist flame, embers and glowing combustion.

Last reviewed: July 6, 2026

Overview

This area of the California Wildland‑Urban Interface Code (CWUIC) collects the test procedures and acceptance criteria used to evaluate exterior wall, window and door assemblies for wildfire exposure — direct flame impingement, ember intrusion and sustained burning/glow. The provisions tie code compliance to specific test methods such as ASTM E2707 and State Fire Marshal (SFM) standards for exterior walls, windows and projections, and to referenced fire‑test standards used for doors and glazing .

Code requirements direct which assemblies may be used and when testing is required: exterior wall performance options are listed in § 504.5 (including ASTM E2707 and SFM Standard 12‑7A‑1 methods) ; exterior glazing and windows are regulated under § 504.8 with acceptance tied to SFM Standard 12‑7A‑2 and related test criteria ; exterior doors and claddings reference § 504.9 and the ASTM E2707 acceptance rules for wall‑cladding performance .

Practically, this means manufacturers, testing laboratories and code officials look to the CWUIC Chapter 5 provisions together with the SFM standards (e.g., 12‑7A‑1, 12‑7A‑2) and nationally referenced ASTM/UL/NFPA tests when documenting that a wall, window or door assembly resists ignition, flame penetration or glowing combustion under specified exposure conditions .

In this section

Code references

Grounded in the retrieved California Wildland-Urban Interface Code — click a citation to read the verbatim passage:

  • CWUIC § 504.9.3 High relevance — show source text

    Gaps between doors and door openings_ shall be controlled by one or more of the following methods: 1. Weather-stripping products constructed of materials that which comply with both of the following: 1.1. The tensile strength of the material shall be tested in accordance with ASTM D638 before and after exposure to ASTM G155 for a period of 2,000 hours, and the maximum allowable difference in tensile strength values between exposed and nonexposed samples shall not exceed 10 percent. 1.2. When tested to UL 94, the materials shall have a flammability rating of V-2 or better. 2. Door overlaps onto jambs and headers. 3. Garage door jambs and headers covered with metal flashing.

    504.9.3 Conditions of acceptance for ASTM E2707. The ASTM E2707 test shall be conducted on a minimum of three test specimens and meet the conditions of acceptance in Items 1 and 2. If any one of the three tests do not meet the conditions of acceptance, three additional tests shall be performed. All three additional tests must meet the conditions of acceptance. 1. Absence of flame penetration through the wall assembly at any time. 2. Absence of evidence of glowing combustion on the interior surface of the assembly at the end of the 70-minute test.

    504.10 Vents. Where provided, ventilation openings for enclosed attics, gable ends, ridge ends, under eaves and cornices, enclosed eave soffit spaces, enclosed rafter spaces formed where ceilings are applied directly to the underside of roof rafters, underfloor venti

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    SPECIAL BUILDING CONSTRUCTION REGULATIONS

    lation, foundations and crawl spaces, or any other opening intended to permit ventilation, either in a horizontal or vertical surface, shall be in accordance with Section 504.10.1 or Section 504.10.2 to resist building ignition from the intrusion of burning embers and flame through the ventilation openings.

    504.10.1 Performance requirements. Ventilation openings shall be fully covered with Wildfire Flame and Ember Resistant vents approved and listed by the California State Fire Marshal, or WUI vents, tested in accordance with ASTM E2886, to demonstrate compliance with all the following requirements:

    1. There shall be no flaming ignition of the cotton material during the Ember Intrusion Test.
    2. There shall be no flaming ignition during the Integrity Test portion of the Flame Intrusion Test.
    3. The maximum temperature of the unexposed side of the vent shall not exceed 662°F (350°C).

    504.10.2 Off ridge and ridge vents. Vents that are installed on a sloped roof, such as dormer vents, shall comply with all of the following: 1. Vents shall be covered with a mesh where the dimensions of the mesh therein shall be a minimum of [1] / 16 inch (1.6 mm) and shall not exceed [1] / 8 inch (3.2 mm) in diameter.

    2. The vent and mesh material shall be noncombustible.

    3. The vent and mesh material shall be corrosion resistant.

  • CWUIC § 2.2. High relevance — show source text

    2.2. Gypsum board for mounting around the window once it is installed; 2.3. Pieces of gypsum cut into narrow strips for use as trim around the window; 2.4. Caulk to be used as per the window manufacturer's instructions. 3. Wall assembly. A noncombustible wall shall be used with a manufacturer or code-specified opening for the particular window. Install window in framed rough opening following manufacturer guidelines. Apply manufacturer-recommended caulk to nailing flange prior to installation. Use narrow strips of gypsum board as trim around window, covering the nail flange of the window. Any type of framing material may be tested. 3.1. Fit the window test assembly into the rear wall of the Wall Assembly Test Module, sealing all edges, including the soffit-to-wall joint. Ceramic wool or comparable material shall be used for sealing.

    12-7A-2.7 Conduct of tests.

    1. Burner output verification. Without the window in place, set the burner for 150 kW output. Conduct a verification run of 3 minutes to assure the heat release rate, and then turn off the burner.

    2. Test. Place the burner against the wall assembly at the center. Ignite the burner at the 150 kW output and control during the test for constant and uniform output. Optional radiometers can be placed behind the Wall Assembly Test Module to measure heat flux through the window glass.

    3. Duration and observations. The test shall be continued until flame-through occurs at the window. Flame-through can occur at the glass (glazing) and/or in the frame. At this point, the burner shall be extinguished and the assembly monitored for sustained combustion. Note the time elapsed and location of penetration if it occurs.

    4. Report. Report a description of the window unit, including the types of frames, cladding and panes being tested and details of the installation. Record when and how the glass breaks or flame-through occurs in the framing materials or sash, and/or

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    MATERIALS AND CONSTRUCTION METHODS FOR EXTERIOR WILDFIRE EXPOSURE

    if the framing material deforms or otherwise suffers a loss of integrity such that the glass cannot be held in place, and a record of the time at which any of these events occur.

    12-7A-2.8 Conditions of Acceptance.

    1. Duration of direct flame exposure. To pass this test standard, the window and window assembly shall withstand 8 minutes of direct flame exposure with the absence of flame penetration through the window frame or pane, or structural failure of the window frame or pane.
    2. Flame penetration or structural failure. Flame penetration or structural failure of the flame or pane anytime during the test constitutes failure of this test standard.

    FIGURE 1 SCHEMATIC OF THE WALL ASSEMBLY Test Module used for evaluating the fire performance of a window.

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    MATERIALS AND CONSTRUCTION METHODS FOR EXTERIOR WILDFIRE EXPOSURE

    HORIZONTAL PROJECTION UNDERSIDE

    SFM STANDARD 12-7A-3

  • CWUIC § 3.2 High relevance — show source text

    1709 A .3.2 Deflection. The deflection of structural members under the design load shall not exceed the limitations in Section 1604 A .3.

    1709 A .4 Wall and partition assemblies. Load-bearing wall and partition assemblies shall sustain the test load both with and without window framing. The test load shall include all design load components. Wall and partition assemblies shall be tested both with and without door and window framing.

    1709 A .5 Exterior window and door assemblies. The design pressure rating of exterior windows and doors in buildings shall be determined in accordance with Section 1709 A .5.1 or 1709 A .5.2. For exterior windows and doors tested in accordance with Section 1709 A .5.1 or 1709 A .5.2, required design wind pressures determined from ASCE 7 shall be permitted to be converted to allowable stress design by multiplying by 0.6.

    Exception: Structural wind load design pressures for window or door assemblies other than the size tested in accordance with Section 1709 A .5.1 or 1709 A .5.2 shall be permitted to be different than the design value of the tested assembly, provided that such pressures are determined by accepted engineering analysis or validated by an additional test of the window or door assembly to the alternative allowable design pressure in accordance with Section 1709 A .5.2. Components of the alternate size assembly shall be the same as the tested or labeled assembly. Where engineering analysis is used, it shall be performed in accordance with the analysis procedures of AAMA 2502 or WDMA I.S. 11.

    1709 A .5.1 Exterior windows and doors. Exterior windows and sliding doors shall be tested and labeled as conforming to AAMA/WDMA/CSA101/I.S.2/A440. The label shall state the name of the manufacturer, the approved labeling agency and the product designation as specified in AAMA/WDMA/CSA101/I.S.2/A440. Exterior side-hinged doors shall be tested and labeled as conforming to AAMA/WDMA/CSA101/I.S.2/A440 or comply with Section 1709 A .5.2. Products tested and labeled as conforming to AAMA/WDMA/CSA 101/I.S.2/A440 shall not be subject to the requirements of Sections 2403.2 and 2403.3.

    1709 A .5.2 Exterior windows and door assemblies not provided for in Section 1709 A .5.1. Exterior window and door assemblies shall be tested in accordance with ASTM E330. Exterior window and door assemblies containing glass shall comply with Section 2403. The design pressure for testing shall be calculated in accordance with Chapter 16. Each assembly shall be tested for 10 seconds at a load equal to 1.5 times the design pressure.

    1709 A .5.2.1 Garage doors and rolling doors. Garage doors and rolling doors shall be tested in accordance with either ASTM E330 or ANSI/DASMA 108, and shall meet the pass/fail criteria of ANSI/DASMA 108. Garage doors and rolling doors shall be labeled with a permanent label identifying the door manufacturer, the door model/series number, the positive and negative design wind pressure rating, the installation instruction drawing reference number, and the applicable test standard.

  • CWUIC § 12-7 High relevance — show source text

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    MATERIALS AND CONSTRUCTION METHODS FOR EXTERIOR WILDFIRE EXPOSURE

    EXTERIOR WINDOWS

    SFM STANDARD 12-7A-2

    12-7A-2.1 Application. Exterior window assemblies that meet the performance criteria of this standard are acceptable for use as defined in the California Building Standards Code.

    12-7A-2.2 Scope. This standard evaluates the performance of exterior windows used in structures when exposed to direct flames.

    12-7A-2.3 Referenced documents.

    1. AAMA (for definitions) Training Manual, Residential & Light Commercial Window and Door Installation Training and Registration Program.
    2. CAWM 400-95, Standard Practice for Installation of Windows with Integral Mounting Flange in Wood Frame Construction.

    12-7A-2.4 Definitions.

    1. Frame (Jambs). This usually consists of two vertical members (side jambs) and two horizontal members (head and sill) that hold the sash. Frames and sash are typically made of steel, aluminum, vinyl, fiberglass, wood or a combination of these materials.

    2. Glazing. The glass in a window. It may include layers of plastic as well as glass.

    3. Sash. The fixed or movable parts of the window in which the panes of glass are set.

    12-7A-2.5 Test apparatus.

    1. Wall assembly test module. The module is designed to permit rapid installation and removal of window/wall assemblies, and is designed to prevent edge penetration of fire at the margins. It includes two noncombustible side walls attached to a wall frame assembly, and a simulated soffit that is also noncombustible. The assembly permits a prefabricated 4 × 8 ft (1.2 × 2.4 m) wall section containing the test window to be inserted from the rear and sealed in such a way that the edges are protected from fire (see Figure 1).
    2. Burner. A 4 × 39 inch (100 × 1000 mm) diffusion burner shall be used. Natural gas, methane or propane shall be supplied to the burner through a metered control system. The gas supply to the burner shall produce a net heat output of 150 ± 4 kW throughout the flame exposure. Burner output can be determined from HRR or calculated from the gas flow rate, temperature and pressure.
    3. Burner location. The burner shall be positioned so that it is centered relative to the width of the wall assembly and against the wall. The distance from the floor to the top of the burner shall be 12 inches (300 mm).

    12-7A-2.6 Test assembly.

    1. Window. The window width cannot exceed 3 feet (900 mm) due to the limitations of the test fixture. The burner’s flame shall cover the full width of the window sill. The distance from top of the burner to bottom of window will be 8 inches (200 mm).
  • CWUIC § 1709.1 High relevance — show source text

    1709.1 General. Where proposed construction is not capable of being designed by approved engineering analysis, or where proposed construction design method does not comply with the applicable material design standard, the system of construction or the structural unit and the connections shall be subjected to the tests prescribed in Section 1709. The building official shall accept certified reports of such tests conducted by an approved testing agency, provided that such tests meet the requirements of this code and approved procedures.

    1709.2 Load test procedures specified. Where specific load test procedures, load factors and acceptance criteria are included in the applicable referenced standards, such test procedures, load factors and acceptance criteria shall apply. In the absence of specific test procedures, load factors or acceptance criteria, the corresponding provisions in Section 1709.3 shall apply.

    1709.3 Load test procedures not specified. Where load test procedures are not specified in the applicable referenced standards, the load-bearing and deformation capacity of structural components and assemblies shall be determined on the basis of a test procedure developed by a registered design professional that simulates applicable loading and deformation conditions. For components and assemblies that are not a part of the seismic force-resisting system, the test shall be as specified in Section 1709.3.1. Load tests shall simulate the applicable loading conditions specified in Chapter 16.

    1709.3.1 Test procedure. The test assembly shall be subjected to an increasing superimposed load equal to not less than two times the superimposed design load. The test load shall be left in place for a period of 24 hours. The tested assembly shall be considered to have successfully met the test requirements if the assembly recovers not less than 75 percent of the maximum deflection within 24 hours after the removal of the test load. The test assembly shall then be reloaded and subjected to an increasing superimposed load until either structural failure occurs or the superimposed load is equal to two and one-half times the load at which the deflection limitations specified in Section 1709.3.2 were reached, or the load is equal to two and one-half times the superimposed design load. In the case of structural components and assemblies for which deflection limitations are not specified in Section 1709.3.2, the test specimen shall be subjected to an increasing superimposed load until structural failure occurs or the load is equal to two and one-half times the desired superimposed design load. The allowable superimposed design load shall be taken as the least of:

    1. The load at the deflection limitation given in Section 1709.3.2.
    2. The failure load divided by 2.5.
    3. The maximum load applied divided by 2.5.

    1709.3.2 Deflection. The deflection of structural members under the design load shall not exceed the limitations in Section 1604.3.

    1709.4 Wall and partition assemblies. Load-bearing wall and partition assemblies shall sustain the test load both with and without window framing. The test load shall include all design load components. Wall and partition assemblies shall be tested both with and without door and window framing.

    1709.5 Exterior window and door assemblies. The design pressure rating of exterior windows and doors in buildings shall be determined in accordance with Section 1709.5.1 or 1709.5.2. For exterior windows and doors tested in accordance with Section 1709.5.1 or 1709.5.2, required design wind pressures determined from ASCE 7 shall be permitted to be converted to allowable stress design by multiplying by 0.6.

  • CWUIC § 1709.3.2 High relevance — show source text

    In the case of structural components and assemblies for which deflection limitations are not specified in Section 1709.3.2, the test specimen shall be subjected to an increasing superimposed load until structural failure occurs or the load is equal to two and one-half times the desired superimposed design load. The allowable superimposed design load shall be taken as the least of:

    1. The load at the deflection limitation given in Section 1709.3.2.
    2. The failure load divided by 2.5.
    3. The maximum load applied divided by 2.5.

    1709.3.2 Deflection. The deflection of structural members under the design load shall not exceed the limitations in Section 1604.3.

    1709.4 Wall and partition assemblies. Load-bearing wall and partition assemblies shall sustain the test load both with and without window framing. The test load shall include all design load components. Wall and partition assemblies shall be tested both with and without door and window framing.

    1709.5 Exterior window and door assemblies. The design pressure rating of exterior windows and doors in buildings shall be determined in accordance with Section 1709.5.1 or 1709.5.2. For exterior windows and doors tested in accordance with Section 1709.5.1 or 1709.5.2, required design wind pressures determined from ASCE 7 shall be permitted to be converted to allowable stress design by multiplying by 0.6.

    Exception: Structural wind load design pressures for window or door assemblies other than the size tested in accordance with Section 1709.5.1 or 1709.5.2 shall be permitted to be different than the design value of the tested assembly, provided that such pressures are determined by accepted engineering analysis or validated by an additional test of the window or door assembly to the alternative allowable design pressure in accordance with Section 1709.5.2. Components of the alternate size assembly shall be the same as the tested or labeled assembly. Where engineering analysis is used, it shall be performed in accordance with the analysis procedures of AAMA 2502 or WDMA I.S. 11.

    1709.5.1 Exterior windows and doors. Exterior windows and sliding doors shall be tested and labeled as conforming to AAMA/WDMA/CSA101/I.S.2/A440. The label shall state the name of the manufacturer, the approved labeling agency and the product designation as specified in AAMA/WDMA/CSA101/I.S.2/A440. Exterior side-hinged doors shall be tested and labeled as conforming to AAMA/WDMA/CSA101/I.S.2/A440 or comply with Section 1709.5.2. Products tested and labeled as conforming to AAMA/WDMA/CSA 101/I.S.2/A440 shall not be subject to the requirements of Sections 2403.2 and 2403.3.

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    1709.5.2 Exterior windows and door assemblies not provided for in Section 1709.5.1. Exterior window and door assemblies shall be tested in accordance with ASTM E330. Exterior window and door assemblies containing glass shall comply with Section 2403. The design pressure for testing shall be calculated in accordance with Chapter 16. Each assembly shall be tested for 10 seconds at a load equal to 1.5 times the design pressure.

  • CWUIC § 504.8 High relevance — show source text

    504.8 Exterior glazing. Exterior windows, window walls and glazed doors, windows within exterior doors, and skylights shall be constructed of any of the following: 1. Multilayered glazed panels with at least one pane of tempered glass complying with Section 2406 of the California Building Code.

    2. Glass block.

    3. Glazing with a fire-protection rating of not less than 20 minutes when tested according to NFPA 257 or UL 9, and shall be exempt from the hose stream test. 4. Glazing meeting the performance requirements of SFM Standard 12-7A-2.

    504.8.1 Structural glass veneer. The wall assembly behind structural glass veneer shall comply with Section 504.5.

    504.8.2 Operable skylights. Operable skylights shall be protected by a noncombustible mesh screen and the dimensions of the openings in the screen shall not exceed [1] / 8 inch (3.2 mm).

    504.9 Exterior doors. Exterior doors shall be constructed in accordance with any of the following:

    1. Noncombustible construction .

    2. Solid-core wood not less than 1 [3] / 4 inches thick (44 mm) . 3. The exterior door shall be constructed of solid core wood that complies with the following requirements: 3.1. Stiles and rails shall not be less than 1 3/8 inches (35 mm) thick. 3.2. Raised panels shall not be less than 11/4 inches (32 mm) thick, except for the exterior perimeter of the raised panel that shall be permitted to taper to a tongue not less than 3/8 inch (10 mm) thick. 4. Have a fire protection rating of not less than 20 minutes when tested according to NFPA 252, UL 10B or UL 10C . 5. The exterior surface or cladding meeting the performance requirements of Section 504.9.3 when tested in accordance with ASTM E2707.

    6. The exterior surface or cladding shall be tested to meet the performance requirements of SFM Standard 12-7A-1.

    Windows within doors and glazed doors shall be in accordance with Section 504.8.

    504.9.1 Garage doors. Automatic garage door openers for vehicle doors serving a residential building shall be equipped with a battery backup function.

    504.9.2 Garage door perimeter gap. Exterior garage doors shall resist the intrusion of embers by preventing gaps between doors and door openings, at the bottom, sides and tops of doors, from exceeding [1] / 8 _inch (3.2 mm).

  • CWUIC § 504.9 High relevance — show source text

    504.9 Exterior doors. Exterior doors shall be constructed in accordance with any of the following:

    1. Noncombustible construction .

    2. Solid-core wood not less than 1 [3] / 4 inches thick (44 mm) . 3. The exterior door shall be constructed of solid core wood that complies with the following requirements: 3.1. Stiles and rails shall not be less than 1 3/8 inches (35 mm) thick. 3.2. Raised panels shall not be less than 11/4 inches (32 mm) thick, except for the exterior perimeter of the raised panel that shall be permitted to taper to a tongue not less than 3/8 inch (10 mm) thick. 4. Have a fire protection rating of not less than 20 minutes when tested according to NFPA 252, UL 10B or UL 10C . 5. The exterior surface or cladding meeting the performance requirements of Section 504.9.3 when tested in accordance with ASTM E2707.

    6. The exterior surface or cladding shall be tested to meet the performance requirements of SFM Standard 12-7A-1.

    Windows within doors and glazed doors shall be in accordance with Section 504.8.

    504.9.1 Garage doors. Automatic garage door openers for vehicle doors serving a residential building shall be equipped with a battery backup function.

    504.9.2 Garage door perimeter gap. Exterior garage doors shall resist the intrusion of embers by preventing gaps between doors and door openings, at the bottom, sides and tops of doors, from exceeding [1] / 8 inch (3.2 mm). Gaps between doors and door openings shall be controlled by one or more of the following methods: 1. Weather-stripping products constructed of materials that which comply with both of the following: 1.1. The tensile strength of the material shall be tested in accordance with ASTM D638 before and after exposure to ASTM G155 for a period of 2,000 hours, and the maximum allowable difference in tensile strength values between exposed and nonexposed samples shall not exceed 10 percent. 1.2. When tested to UL 94, the materials shall have a flammability rating of V-2 or better. 2. Door overlaps onto jambs and headers. 3. Garage door jambs and headers covered with metal flashing.

    504.9.3 Conditions of acceptance for ASTM E2707. The ASTM E2707 test shall be conducted on a minimum of three test specimens and meet the conditions of acceptance in Items 1 and 2. If any one of the three tests do not meet the conditions of acceptance, three additional tests shall be performed. All three additional tests must meet the conditions of acceptance. 1. Absence of flame penetration through the wall assembly at any time. 2. Absence of evidence of glowing combustion on the interior surface of the assembly at the end of the 70-minute test.

    504.10 Vents. Where provided, ventilation openings for enclosed attics, gable ends, ridge ends, under eaves and cornices, enclosed eave soffit spaces, enclosed rafter spaces formed where ceilings are applied directly to the underside of roof rafters, underfloor venti

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  • CWUIC § 3.2 High relevance — show source text

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    SPECIAL INSPECTIONS AND TESTS

    considered to have successfully met the test requirements if the assembly recovers not less than 75 percent of the maximum deflection within 24 hours after the removal of the test load. The test assembly shall then be reloaded and subjected to an increasing superimposed load until either structural failure occurs or the superimposed load is equal to two and one-half times the load at which the deflection limitations specified in Section 1709 A .3.2 were reached, or the load is equal to two and one-half times the superimposed design load. In the case of structural components and assemblies for which deflection limitations are not specified in Section 1709 A .3.2, the test specimen shall be subjected to an increasing superimposed load until structural failure occurs or the load is equal to two and one-half times the desired superimposed design load. The allowable superimposed design load shall be taken as the least of:

    1. The load at the deflection limitation given in Section 1709 A .3.2.
    2. The failure load divided by 2.5.
    3. The maximum load applied divided by 2.5.

    1709 A .3.2 Deflection. The deflection of structural members under the design load shall not exceed the limitations in Section 1604 A .3.

    1709 A .4 Wall and partition assemblies. Load-bearing wall and partition assemblies shall sustain the test load both with and without window framing. The test load shall include all design load components. Wall and partition assemblies shall be tested both with and without door and window framing.

    1709 A .5 Exterior window and door assemblies. The design pressure rating of exterior windows and doors in buildings shall be determined in accordance with Section 1709 A .5.1 or 1709 A .5.2. For exterior windows and doors tested in accordance with Section 1709 A .5.1 or 1709 A .5.2, required design wind pressures determined from ASCE 7 shall be permitted to be converted to allowable stress design by multiplying by 0.6.

    Exception: Structural wind load design pressures for window or door assemblies other than the size tested in accordance with Section 1709 A .5.1 or 1709 A .5.2 shall be permitted to be different than the design value of the tested assembly, provided that such pressures are determined by accepted engineering analysis or validated by an additional test of the window or door assembly to the alternative allowable design pressure in accordance with Section 1709 A .5.2. Components of the alternate size assembly shall be the same as the tested or labeled assembly. Where engineering analysis is used, it shall be performed in accordance with the analysis procedures of AAMA 2502 or WDMA I.S. 11.

  • CWUIC § 12-7 Medium relevance — show source text

    504.8

    12-7A-3: Horizontal Projection Underside. A fire resistance test standard consisting of a 300 kW intensity direct flame exposure for a 10-minute duration

    504.3, 504.7, 504.7.1

    12-7A-4: Decking. A two-part test consisting of a heat release rate (Part A) deck assembly combustion test with an under deck exposure of 80 kW intensity direct flame for a 3-minute duration, and a (Part B) sustained deck assembly combustion test consisting of a deck upper surface burning ember exposure with a 12 mph wind for 40 minutes using a 2.2 lb (1kg) burning “Class A” size 12" × 12" × 2.25" (300 mm × 300 mm × 57 mm) roof test brand

    504.7.3.2

    12-7A-4A: Decking Alternate Method A. A heat release rate deck assembly combustion test with an under deck exposure of 80 kW intensity direct flame for a 3-minute duration

    504.7.3.2

    State Fire Marshal’s Guidelines for Fire Hydrant Markings Along State Highways and Freeways, May 1988

    404.8

    UL UL LLC, 333 Pfingsten Road, Northbrook, IL 60062-2096

    9—2009: Fire Tests of Window Assemblies—with Revisions through March 2020

    504.8

    10B—2008: Fire Tests of Door Assemblies—with Revisions through May 2020

    504.9

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    REFERENCED STANDARDS

    10C—2016: Positive Pressure Fire Tests of Door Assemblies—with Revisions through May 2021

    504.9

    94—2023: Tests for Flammability of Plastic Materials for Parts in Devices and Appliances

    504.9.2

    263—2011: Fire Tests of Building Construction and Materials—with Revisions through March 2022

    501.3, 504.3, 504.3.1, 504.5, 504.7, 504.7.1

    723—2018: Test for Surface Burning Characteristics of Building Materials

    202, 501.4.1, 503.2.4, 504.7.3.2, 504.7.3.3

    790— 2022 : Standard Test Methods for Fire Tests of Roof Coverings

    504.2, 504.2.1.2, 504.11.6

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    CALIFORNIA WILDLAND-URBAN INTERFACE CODE – MATRIX ADOPTION TABLE

    APPENDIX A – GENERAL REQUIREMENTS

  • CWUIC § 12-7 Medium relevance — show source text

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    MATERIALS AND CONSTRUCTION METHODS FOR EXTERIOR WILDFIRE EXPOSURE

    12-7A-1.10 Report. The report shall include the following:

    1. Name and address of the testing laboratory.

    2. Name and address of test sponsor.

    3. Description of the test specimen including construction details of the wall system, including details of individual components (such as type, thickness and installation method of any sheathing) and the manufacturer’s installation details and limitations as applicable.

    4. Number of specimens tested.

    5. Description of weathering, as applicable.

    6. Moisture content of hygroscopic elements of wall system construction at the time of testing.

    7. Details of the burner verification, including heat supply rate.

    8. Date of test, test identification number and date of report.

    9. The test results shall include:

    9.1. A notation of the time and location of sustained flaming on the unexposed side of the test specimen during the test, along with the sequence number of the test specimen. 9.2. A determination of the presence of glow on the unexposed side of the test specimen at the end of the 60-minute observation period. 9.3. Observations of the burning characteristics of the exposed surface of the test wall during and after the flame

    exposure.

    12-7A-1.11 Conditions of Acceptance. Should one of the three replicates fail to meet the Conditions of Acceptance, three additional tests may be run. All of the additional tests must meet the Conditions of Acceptance.

    1. Absence of flame penetration through the wall assembly at any time.
    2. Absence of evidence of glowing combustion on the interior surface of the assembly at the end of the 70-minute test.

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    MATERIALS AND CONSTRUCTION METHODS FOR EXTERIOR WILDFIRE EXPOSURE

    EXTERIOR WINDOWS

    SFM STANDARD 12-7A-2

    12-7A-2.1 Application. Exterior window assemblies that meet the performance criteria of this standard are acceptable for use as defined in the California Building Standards Code.

    12-7A-2.2 Scope. This standard evaluates the performance of exterior windows used in structures when exposed to direct flames.

    12-7A-2.3 Referenced documents.

    1. AAMA (for definitions) Training Manual, Residential & Light Commercial Window and Door Installation Training and Registration Program.
    2. CAWM 400-95, Standard Practice for Installation of Windows with Integral Mounting Flange in Wood Frame Construction.

    12-7A-2.4 Definitions.

    1. Frame (Jambs). This usually consists of two vertical members (side jambs) and two horizontal members (head and sill) that hold the sash. Frames and sash are typically made of steel, aluminum, vinyl, fiberglass, wood or a combination of these materials.

    2. Glazing. The glass in a window. It may include layers of plastic as well as glass.

    3. Sash. The fixed or movable parts of the window in which the panes of glass are set.

    12-7A-2.5 Test apparatus.

    1. Wall assembly test module. The module is designed to permit rapid installation and removal of window/wall assemblies, and is designed to prevent edge penetration of fire at the margins.
  • CWUIC § 504.7.3.3 Medium relevance — show source text

    504.7.3.3 Performance requirements for Section 504.7.3.2, Item 1. Materials shall be tested in accordance with both ASTM E2632 and ASTM E2726 and comply with the conditions of acceptance in Sections 504.7.3.3.1 and 504.7.3.3.2. The material shall also be tested in accordance with ASTM E84 or UL 723 and comply with the performance requirements of Section 503.2.4.

    504.7.3.3.1 Conditions of acceptance for ASTM E2632. The ASTM E2632 test shall be conducted on a minimum of three test specimens and meet the conditions of acceptance in Items 1 through 3. If any one of the three tests does not meet the conditions of acceptance, three additional tests shall be performed. All three additional tests must meet the conditions of acceptance. 1. Peak heat release rate of less than or equal to 25 kW/ft2 (269 kW/m2).

    2025 CALIFORNIA WILDLAND-URBAN INTERFACE CODE 5-7

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

    SPECIAL BUILDING CONSTRUCTION REGULATIONS

    2. Absence of sustained flaming or glowing combustion of any kind at the conclusion of the 40-minute observation period. 3. Absence of falling particles that are still burning when reaching the burner or floor.

    504.7.3.3.2 Conditions of acceptance for ASTM E2726. The ASTM E2726 test shall be conducted, using a “Class A” size roof test brand, on a minimum of three test specimens and meet the conditions of acceptance in Items 1 and 2. If any one of the three tests does not meet the conditions of acceptance, three additional tests shall be performed. All three additional tests must meet the conditions of acceptance. 1. Absence of sustained flaming or glowing combustion of any kind at the conclusion of the 40-minute observation period. 2. Absence of falling particles that are still burning when reaching the burner or floor.

    504.7.3.4 Performance requirements for Section 504.7.3.2, Item 7. The ASTM E2632 test shall be conducted on a minimum of three test specimens and the peak heat release rate shall be less than or equal to 25 kW/ft [2] (269 kW/m [2] ). If any one of the three tests does not meet the conditions of acceptance, three additional tests shall be run. All the additional tests shall meet the condi- tion of acceptance. If any one of the three tests does not meet the condition of acceptance, three additional tests shall be performed. All three additional tests must show a peak heat release rate shall be 25 kW/ft2 (269 kW/m2) or less.

    504.8 Exterior glazing. Exterior windows, window walls and glazed doors, windows within exterior doors, and skylights shall be constructed of any of the following: 1. Multilayered glazed panels with at least one pane of tempered glass complying with Section 2406 of the California Building Code.

    2. Glass block.

Frequently asked questions

What wall test methods does the CWUIC rely on and what do they require?

CWUIC accepts performance shown by tests such as ASTM E2707 (10‑minute direct flame impingement) and SFM Standard 12‑7A‑1 (150 kW, 10‑minute wall siding/sheathing exposure). Conditions of acceptance commonly require absence of flame penetration and absence of glowing combustion on the interior surface after the observation period .

How are windows and glazed doors evaluated for wildfire exposure?

Exterior windows are evaluated to SFM Standard 12‑7A‑2 (150 kW direct flame exposure) and must meet its conditions of acceptance (for example, surviving an 8‑minute direct flame exposure without flame penetration or structural failure of the glazing or frame) as referenced in § 504.8 of the CWUIC .

Do exterior doors need special testing or marking?

Exterior doors may be noncombustible, solid‑core wood, fire‑rated, or have exterior surfaces/claddings tested to standards such as ASTM E2707 or the fire‑door test standards (NFPA 252 / UL 10B / UL 10C). The CWUIC lists these options and cross‑references the conditions of acceptance used to demonstrate compliance in § 504.9 .

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