Wall Coverings

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

• CRC § 7.2 High relevance — show source text

  7|||||||||||||||||||||||| |Table R702.7 (3)||||†|||||||||||||||||||| |R702.7.2||||||||||||||||||||X|||| |Table_R702.7.3_||||||||||||||||||||X||||

  The state agency does not adopt sections identified with the following symbol: †

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  7 WALL COVERING

  User notes:

  About this chapter: Chapter 7 establishes the various types of materials, materials standards and methods of application permitted as interior and exterior wall coverings. Interior coverings include interior plaster, gypsum board, ceramic tile, wood veneer paneling, hardboard paneling, wood shakes and wood shingles. Exterior wall coverings regulated by this section include aluminum, stone and masonry veneer, wood, hardboard, particleboard, wood structural panel siding, wood shakes and shingles, exterior plaster, steel, vinyl, fiber cement and exterior insulation finish systems. This chapter also contains requirements for the use of vapor retarders for moisture control in walls; wind resistance and water-resistive barriers for exterior wall coverings; and the water-resistive barrier required beneath exterior materials.

  SECTION R701—GENERAL

  R701.1 Application. The provisions of this chapter shall control the design and construction of the interior and exterior wall covering for buildings.

  R701.2 Installation. Products sensitive to adverse weather shall not be installed until adequate weather protection for the installation is provided. Exterior sheathing shall be dry before applying exterior cover.

  SECTION R702—INTERIOR COVERING

  R702.1 General. Interior coverings or wall finishes shall be installed in accordance with this chapter and Tables R702.1(1), R702.1(2), R702.1(3) and R702.3.5. Interior masonry veneer shall comply with the requirements of Section R703.7.1 for support and Section R703.7.4 for anchorage, except an airspace is not required. Interior finishes and materials shall conform to the flame spread and smoke-development requirements of Section R302.9.

  **

  TABLE R702.1(1)—THICKNESS OF PLASTER	Col2	Col3
  ** PLASTER BASE**	** FINISHED THICKNESS OF PLASTER FROM FACE OF LATH, MASONRY, CONCRETE** (inches)	** FINISHED THICKNESS OF PLASTER FROM FACE OF LATH, MASONRY, CONCRETE** (inches)
  ** PLASTER BASE**	** Gypsum Plaster**	** Cement Plaster**
  Expanded metal lath	5/8, minimuma	5/8, minimuma
  Wire lath	5/8, minimuma	3/4, minimum (interior)b
  Wire lath	5/8, minimuma	7/8, minimum (exterior)b
  Gypsum lathg	1/2, minimum	3/4, minimum (interior)b
  Masonry wallsc	1/2, minimum	1/2, minimum
  Monolithic concrete wallsc, d	5/8, maximum	7/8, maximum
  Monolithic concrete ceilingsc, d	3/8,

• CRC § 803.7 Medium relevance — show source text

  803.7 Expanded vinyl wall coverings. Where used as interior wall finish materials, expanded vinyl wall coverings shall be tested in the manner intended for use, using the product-mounting system, including adhesive, and shall comply with the requirements of one of the following: Section 803.1.1, 803.5.1 or 803.5.2.

  803.8 Expanded vinyl ceiling coverings. Where used as interior ceiling finish materials, expanded vinyl ceiling coverings shall be tested in the manner intended for use, using the product mounting system, including adhesive, and shall comply with the requirements of Section 803.1.1 or 803.5.2.

  803.9 High-density polyethylene (HDPE) and polypropylene (PP). Where high-density polyethylene or polypropylene is used as an interior finish, it shall comply with Section 803.1.1.

  803.10 Site-fabricated stretch systems. Where used as interior wall or interior ceiling finish materials, site-fabricated stretch systems containing all three components described in the definition in Chapter 2 shall be tested in the manner intended for use, and shall comply with the requirements of Section 803.1.1 or with the requirements of Class A in accordance with Section 803.1.2. If the materials are tested in accordance with ASTM E84 or UL 723, specimen preparation and mounting shall be in accordance with ASTM E2573.

  803.11 Laminated products factory produced with a wood substrate. Laminated products factory produced with a wood substrate shall comply with one of the following:

  1. The laminated product shall meet the criteria of Section 803.1.1.1 when tested in accordance with NFPA 286 using the product-mounting system, including adhesive, as described in Section 5.8 of NFPA 286.
  2. The laminated product shall have a Class A, B, or C flame spread index and smoke-developed index, based on the requirements of Table 803.13, in accordance with ASTM E84 or UL 723. Test specimen preparation and mounting shall be in accordance with ASTM E2579.

  803.12 Facings or wood veneers intended to be applied on site over a wood substrate. Facings or veneers intended to be applied on site over a wood substrate shall comply with one of the following:

  1. The facing or veneer shall meet the criteria of Section 803.1.1.1 when tested in accordance with NFPA 286 using the product mounting system, including adhesive, as described in Section 5.9 of NFPA 286.
  2. The facing or veneer shall have a Class A, B or C flame spread index and smoke-developed index, based on the requirements of Table 803.13, in accordance with ASTM E84 or UL 723. Test specimen preparation and mounting shall be in accordance with ASTM E2404.

  803.13 Interior finish requirements based on occupancy. Interior wall and ceiling finish shall have a classification such that the flame spread index and smoke-developed index values are not higher than those corresponding to the classification specified in Table 803.13 for the group and location designated. Interior wall and ceiling finish materials tested in accordance with NFPA 286 and meeting the acceptance criteria of Section 803.1.1.1, shall be permitted to be used where a Class A classification in accordance with ASTM E84 or UL 723 is required.

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• CRC § 2025 Medium relevance — show source text

  The prescriptive provisions of this chapter provide requirements for constructing footings and walls for foundations of wood, masonry, concrete and precast concrete. In addition to a foundation’s ability to support the required design loads, this chapter addresses several other factors that can affect foundation performance. These include controlling surface water and subsurface drainage, requiring soil tests where conditions warrant and evaluating proximity to slopes and minimum depth requirements. The chapter also provides requirements to minimize adverse effects of moisture, decay and pests in basements and crawl spaces.

  Chapter 5 Floors.

  Chapter 5 provides the requirements for the design and construction of floor systems that will be capable of supporting minimum required design loads. This chapter covers four different types: wood floor framing, wood floors on the ground, cold-formed steel floor framing and concrete slabs on the ground. Allowable span tables are provided that greatly simplify the determination of joist, girder and sheathing sizes for raised floor systems of wood framing and cold-formed steel framing. This chapter also contains prescriptive requirements for wood-framed exterior decks and their attachment to the main building.

  Chapter 6 Wall Construction.

  Chapter 6 contains provisions that regulate the design and construction of walls. The wall construction covered in Chapter 6 consists of five different types: wood framed, cold-formed steel framed, masonry, concrete and structural insulated panel (SIP). The primary concern of this chapter is the structural integrity of wall construction and transfer of all imposed loads to the supporting structure. This chapter provides the requirements for the design and construction of wall systems that are capable of supporting the minimum design vertical loads (dead, live and snow loads) and lateral loads (wind or seismic loads). This chapter contains the prescriptive requirements for wall bracing and/or shear walls to resist the imposed lateral loads due to wind and seismic activity.

  Chapter 6 also regulates exterior windows and doors installed in walls. This chapter contains criteria for the performance of exterior windows and doors and includes provisions for testing and labeling, garage doors, windborne debris protection and anchorage details.

  Chapter 7 Wall Covering.

  Chapter 7 contains provisions for the design and construction of interior and exterior wall coverings. This chapter establishes the various types of materials, materials standards and methods of application permitted for use as interior coverings, including interior plaster, gypsum board, ceramic tile, wood veneer paneling, hardboard paneling, wood shakes and wood shingles. Chapter 7 also contains requirements for the use of vapor retarders for moisture control in walls.

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  Exterior wall coverings provide the weather-resistant exterior envelope that protects the building’s interior from the elements. Chapter 7 provides the requirements for wind resistance and water-resistive barrier for exterior wall coverings. This chapter prescribes the exterior wall coverings as well as the water-resistive barrier required beneath the exterior materials. Exterior wall coverings regulated by this section include aluminum, stone and masonry veneer, wood, hardboard, particleboard, wood structural panel siding, wood shakes and shingles, exterior plaster, steel, vinyl, fiber cement and exterior insulation finish systems.

  Chapter 8 Roof-Ceiling Construction.

• CRC § 12-8 Medium relevance — show source text

  (b) Materials intended for application to a wood surface are to be applied to a substrate made of 1 inch by 4 inches (25 mm by 101 mm) nominal “C” and better VG Douglas fir flooring (FSC 70 to 90) or to other species for which the surface burning characteristic is to be measured.

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  GUIDE TO MOUNTING TECHNIQUES FOR WALL AND CEILING INTERIOR FINISH MATERIAL

  (c) Coating materials intended for application to particular combustible surfaces, but not wood, are to be applied to the specific surface for which they are intended. The coating material and combustible material are to be attached to the substrate board as specified in Section 12-8-1B.1 (d).

  (d) Coating materials intended only for field applications to nonflammable surfaces are to be applied to 0.5 in calcium silicate board.

  WALL COVERING MATERIAL

  Sec. 12-8-1B.6. Wall coverings such as vinyl coatings, wallpaper, etc., of various types are to be mounted on 0.625-inch (16 mm) gypsum wallboard or on the actual substrate to which they are to be applied, using the adhesive and application technique specified by the manufacturer.

  FIGURE 12-8-1B-1—TYPICAL STEEL FRAME SUPPORT SYSTEM

  FIGURE 12-8-1B-2—MATERIAL FASTENING TECHNIQUE

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  GUIDE TO MOUNTING TECHNIQUES FOR WALL AND CEILING INTERIOR FINISH MATERIAL

  FIGURE 12-8-1B-3—TYPICAL MOUNTING TECHNIQUE FOR RIGID WALL MATERIALS

  Note: When required, additional fasteners may be used to hold up the specimen flush to the wall.

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  GUIDE TO MOUNTING TECHNIQUES FOR WALL AND CEILING INTERIOR FINISH MATERIAL

  FIGURE 12-8-1B-4—TYPICAL MOUNTING TECHNIQUE FOR FLEXIBLE WALL MATERIALS

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  GUIDE TO MOUNTING TECHNIQUES FOR WALL AND CEILING INTERIOR FINISH MATERIAL

  FIGURE 12-8-1B-5—TYPICAL MOUNTING TECHNIQUE FOR CEILING MATERIALS

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  POWER-OPERATED EXIT DOORS

  STANDARD 12-10-1

  STATE FIRE MARSHAL

  SCOPE

  Sec. 12-10-100.

• CRC § 5-1.4 Medium relevance — show source text

  Glazed or
  unglazed facing
  tile, nonload-
  bearing|5-1.4|One 2" unit cored 22 percent maximum and one 4" unit cored
  41 percent maximum with1/4" mortar-filled collar joint. Two
  wythes tied together every third course with 0.030"(No. 22
  galvanized sheet steel gage) corrugated metal ties.|—|—|6|—| |5. Glazed or
  unglazed facing
  tile, nonload-
  bearing|5-1.5|One 4" unit cored 25 percent maximum with3/4" gypsum plas-
  ter on one side.|—|—|43/4|—| |5. Glazed or
  unglazed facing
  tile, nonload-
  bearing|5-1.6|One 4" unit with two cells in wall thickness, cored 22 percent
  maximum.|—|—|—|4| |5. Glazed or
  unglazed facing
  tile, nonload-
  bearing|5-1.7|One 4" unit cored 30 percent maximum with3/4" vermiculite
  gypsum plaster on one side.|—|—|41/2|—| |5. Glazed or
  unglazed facing
  tile, nonload-
  bearing|5-1.8|One 4" unit cored 39 percent maximum with3/4" gypsum plas-
  ter on one side.|—|—|—|41/2| |6. Solid gypsum
  plaster|6-1.1|3/4" by 0.055" (No. 16 carbon sheet steel gage) vertical cold-
  rolled channels, 16" on center with 2.6-pound flat metal lath
  applied to one face and tied with 0.049" (No. 18 B.W. gage)
  wire at 6" spacing. Gypsum plaster each side mixed 1:2 by
  weight, gypsum to sand aggregate.|—|—|—|2d| |6. Solid gypsum
  plaster|6-1.2|3/4" by 0.05" (No. 16 carbon sheet steel gage) cold-rolled chan-
  nels 16" on center with metal lath applied to one face and tied
  with 0.049" (No. 18 B.W. gage) wire at 6" spacing. Perlite or
  vermiculite gypsum plaster each side. For three-coat work, the
  plaster mix for the second coat shall not exceed 100 pounds of
  gypsum to 21/2 cubic feet of aggregate for the 1-hour system.|—|—|21/2
  d|2d| |6. Solid gypsum
  plaster|6-1.3|3/4" by 0.055" (No. 16 carbon sheet steel gage) vertical cold-
  rolled channels, 16" on center with3/8" gypsum lath applied to
  one face and attached with sheet metal clips. Gypsum plaster
  each side mixed 1:2 by weight, gypsum to sand aggregate.|—|—|—|2d| |6.

• California Residential Code Medium relevance — show source text

  20|5| |W-12-M-61|125/8″|Clay or shale structural tile; see Notes 3, 6,
  14, 19; facings: fire side only; see Note 17.|80 psi|3 hrs
  30 min||1||1, 20|31/2| |W-12-M-62|125/8″|Clay or shale structural tile; see Notes 3, 6,
  16, 18; facings: side 1, see Note 17; side 2,
  none.|80 psi|6 hrs||1||1, 20|6| |W-12-M-63|125/8″|Clay or shale structural tile; see Notes 3, 6,
  16, 19; facings: fire side only; see Note 17.|80 psi|4 hrs||1||1, 20|4| |W-12-M-64|125/8″|Core: 8″, 40% solid clay or shale structural
  tile; facings: 4″ brick plus5/8″ of 1:3 sanded
  gypsum plaster on one side.|80 psi|7 hrs||1||1, 20|7| |W-13-M-65|13″|Core: solid clay or shale brick;1/2″ of 1:3
  sanded gypsum plaster facings on both
  sides.|160
  psi|12 hrs||1||1, 44|12| |W-13-M-66|13″|Core: solid clay or shale brick;1/2″ of 1:3
  sanded gypsum plaster facings on both
  sides.|N/A|15 hrs||1||1, 20|15| |W-13-M-67|13″|Core: solid clay or shale brick;1/2″ of 1:3
  sanded gypsum plaster facings on both
  sides.|N/A|15 hrs||1||1|15| |W-13-M-68|13″|Core: hollow rolok of clay or shale;1/2″ of 1:3
  sanded gypsum plaster facings on both
  sides.|80 psi|7 hrs||1||1, 20|7| |W-13-M-69|13″|Core: concrete brick;1/2″ of 1:3 sanded
  gypsum plaster facings on both sides.|160
  psi|16 hrs||1||1, 44|16| |W-13-M-70|13″|Core: sand-lime brick;1/2″ of 1:3 sanded
  gypsum plaster facings on both sides.|160
  psi|12 hrs||1||1, 44|12| |W-13-M-71|13″|Core: sand-lime brick;1/2″ of 1:3 sanded
  gypsum plaster facings on both sides.|N/A|17 hrs||1||1|17| |W-13-M-72|13″|Cored clay or shale brick; units in wall thick-
  ness: 1; cells in wall thickness: 2;
  minimum % solids: 70;1/2″ of 1:3 sanded
  gypsum plaster facings on both sides.|120
  psi|7 hrs||1||1, 45|7| |W-13-M-73|13″|Cored clay or shale brick; units in wall thick-
  ness: 3;

• CRC § 9.1 Medium relevance — show source text

  R302.9 Flame spread index and smoke-developed index for wall and ceiling finishes. Flame spread and smoke-developed indices for wall and ceiling finishes shall be in accordance with Sections R302.9.1 through R302.9.4.

  R302.9.1 Flame spread index. Wall and ceiling finishes shall have a flame spread index of not greater than 200.

  Exception: Flame spread index requirements for finishes shall not apply to trim defined as picture molds, chair rails, baseboards and handrails; to doors and windows or their frames; or to materials that are less than [1] / 28 inch (0.91 mm) in thickness cemented to the surface of walls or ceilings if these materials exhibit flame spread index values not greater than those of paper of this thickness cemented to a noncombustible backing.

  R302.9.2 Smoke-developed index. Wall and ceiling finishes shall have a smoke-developed index of not greater than 450.

  R302.9.3 Testing. Tests shall be made in accordance with ASTM E84 or UL 723.

  R302.9.4 Alternative test method. As an alternative to having a flame spread index of not greater than 200 and a smoke-developed index of not greater than 450 where tested in accordance with ASTM E84 or UL 723, wall and ceiling finishes shall be permitted to be tested in accordance with NFPA 286. Materials tested in accordance with NFPA 286 shall meet the following criteria:

  The interior finish shall comply with the following:

  1. During the 40 kW exposure, flames shall not spread to the ceiling.

  2. The flame shall not spread to the outer extremity of the sample on any wall or ceiling.

  3. Flashover, as defined in NFPA 286, shall not occur.

  4. The peak heat release rate throughout the test shall not exceed 800 kW.

  5. The total smoke released throughout the test shall not exceed 1,000 m [2] .

  R302.9.4.1 Stability. Interior finish materials regulated by this chapter shall be applied or otherwise fastened in such a manner that such materials will not readily become detached where subjected to room temperatures of 200°F (93°C) for not less than 30 minutes.

  R302.9.5 High-density polyethylene (HDPE) and polypropylene (PP). Where high-density polyethylene or polypropylene is used as an interior finish material, it shall be tested in accordance with NFPA 286 and comply with the criteria in Section R302.9.4.

  R302.10 Flame spread index and smoke-developed index for insulation. Flame spread and smoke-developed index for insulation shall be in accordance with Sections R302.10.1 through R302.10.4.

  R302.10.1 Insulation. Insulating materials installed within floor-ceiling assemblies, roof-ceiling assemblies, wall assemblies, crawl spaces and attics shall comply with the requirements of this section. They shall exhibit a flame spread index not to exceed 25 and a smoke-developed index not to exceed 450 where tested in accordance with ASTM E84 or UL 723. Insulating materials, where tested in accordance with the requirements of this section, shall include facings, where used, such as vapor retarders, vapor permeable membranes and similar coverings.

  Exceptions:

• CRC § 2025 Medium relevance — show source text

  Chapter 6 also regulates exterior windows and doors installed in walls. This chapter contains criteria for the performance of exterior windows and doors and includes provisions for testing and labeling, garage doors, windborne debris protection and anchorage details.

  Chapter 7 Wall Covering.

  Chapter 7 contains provisions for the design and construction of interior and exterior wall coverings. This chapter establishes the various types of materials, materials standards and methods of application permitted for use as interior coverings, including interior plaster, gypsum board, ceramic tile, wood veneer paneling, hardboard paneling, wood shakes and wood shingles. Chapter 7 also contains requirements for the use of vapor retarders for moisture control in walls.

  2025 CALIFORNIA RESIDENTIAL CODE xv

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  Exterior wall coverings provide the weather-resistant exterior envelope that protects the building’s interior from the elements. Chapter 7 provides the requirements for wind resistance and water-resistive barrier for exterior wall coverings. This chapter prescribes the exterior wall coverings as well as the water-resistive barrier required beneath the exterior materials. Exterior wall coverings regulated by this section include aluminum, stone and masonry veneer, wood, hardboard, particleboard, wood structural panel siding, wood shakes and shingles, exterior plaster, steel, vinyl, fiber cement and exterior insulation finish systems.

  Chapter 8 Roof-Ceiling Construction.

  Chapter 8 regulates the design and construction of roof-ceiling systems. This chapter contains two roof-ceiling framing systems: wood framing and cold-formed steel framing. Allowable span tables are provided to simplify the selection of rafter and ceiling joist size for wood roof framing and cold-formed steel framing. Chapter 8 also provides requirements for the application of ceiling finishes, the proper ventilation of concealed spaces in roofs (e.g., enclosed attics and rafter spaces), unvented attic assemblies and attic access.

  Chapter 9 Roof Assemblies.

  Chapter 9 regulates the design and construction of roof assemblies. A roof assembly includes the roof deck, vapor retarder, substrate or thermal barrier, insulation, vapor retarder and roof covering. This chapter provides the requirement for wind resistance of roof coverings.

  The types of roof covering materials and installation regulated by Chapter 9 are: asphalt shingles, clay and concrete tile, metal roof shingles, mineral-surfaced roll roofing, slate and slate-type shingles, wood shakes and shingles, built-up roofs, metal roof panels, modified bitumen roofing, thermoset and thermoplastic single-ply roofing, sprayed polyurethane foam roofing, liquid applied coatings and photovoltaic shingles. Chapter 9 also provides requirements for roof drainage, flashing, above deck thermal insulation, rooftop-mounted photovoltaic systems and recovering or replacing an existing roof covering.

  Chapter 10 Chimneys and Fireplaces.

  Chapter 10 contains requirements for the safe construction of masonry chimneys and fireplaces and establishes the standards for the use and installation of factory-built chimneys, fireplaces and masonry heaters. Chimneys and fireplaces constructed of masonry rely on prescriptive requirements for the details of their construction; the factory-built type relies on the listing and labeling method of approval. Chapter 10 provides the requirements for seismic reinforcing and anchorage of masonry fireplaces and chimneys.

  Chapter 11 [RE] Energy Efficiency.

  Chapter 11 is not adopted in California. See California Energy Code, Title 24, Part 6.

  Chapter 12 Mechanical Administration.

• CRC § 25.4 Medium relevance — show source text

  8 lbs/ft2 on
  both sides of wall.|See Note
  3|1 hr||1||1–3|1| |W-6-W-2|61/2″|2″ × 4″ stud wall;1/2″ thick, 1:3; 1:3
  gypsum plaster on 1″ thick magnesium
  oxysulfate wood fiberboard on both sides
  of wall.|See Note
  3|45 min||1||1–3|3/4| |W-7-W-3|71/4″|Double row of 2″ × 4″ studs,1/2″ thick of
  1:2; 1:2 gypsum plaster applied over3/8″
  thick perforated gypsum lath on both
  sides of wall; mineral wool insulation.|N/A|1 hr|||43|2, 4,
  5|1| |W-7-W-4|71/2″|Double row of 2″ × 4″ studs,5/8″ thick of
  1:2; 1:2 gypsum plaster applied over3/8″
  thick perforated gypsum lath over laid
  with 2″ × 2″, 16 gage wire fabric, on both
  sides of wall.|N/A|1 hr
  15 min|||43|2, 4|11/4|

  For SI: 1 inch = 25.4 mm, 1 pound = 0.004448 kN, 1 pound per square inch = 0.00689 MPa, 1 pound per square foot = 47.9 N/m [2] .

  Notes:

  1. Nominal 2-inch by 4-inch wood studs of No. 1 common or better lumber set edgewise. Two-inch by 4-inch plates at top and bottom and blocking at mid height of wall.
  2. Mix proportions for plastered walls as follows: first ratio indicates scratch coat mix, weight of dry plaster to dry sand; second ratio indicates brown coat mix.
  3. Load: 360 psi of net stud cross-sectional area.
  4. Nominal 2-inch by 4-inch studs of yellow pine of Douglas-fir spaced 16 inches in a double row, with studs in rows staggered.
  5. Mineral wool bats, 0.19 lb./ft [2] .

  2025 CALIFORNIA EXISTING BUILDING CODE RESOURCE A-63

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  RESOURCE A—GUIDELINES ON FIRE RATINGS OF ARCHAIC MATERIALS AND ASSEMBLIES

  TABLE 1.4.1 MISCELLANEOUS MATERIALS WALLS 0″ TO LESS THAN 4″ THICK	Col2	Col3	Col4	Col5	Col6	Col7	Col8	Col9	Col10
  ITEM CODE	THICKNESS	CONSTRUCTION DETAILS	PERFORMANCE	PERFORMANCE	REFERENCE NUMBER	REFERENCE NUMBER	REFERENCE NUMBER	NOTES	**REC.

• CRC § 1405.1.3 Medium relevance — show source text

  1405.1.3 Fireblocking. Where the combustible exterior wall covering is furred out from the exterior wall and forms a solid surface, the distance between the back of the exterior wall covering and the exterior wall shall not exceed 1 [5] / 8 inches (41 mm). The concealed space thereby created shall be fireblocked in accordance with Section 718. Exception: The distance between the back of the exterior wall covering and the exterior wall shall be permitted to exceed 1 [5] / 8 inches (41 mm) where the concealed space is not required to be fireblocked by Section 718.

  SECTION 1406—METAL COMPOSITE MATERIAL (MCM)

  1406.1 General. The provisions of this section shall govern the materials, construction and quality of metal composite material (MCM) for use as exterior wall coverings in addition to other applicable requirements of Chapters 14 and 16.

  1406.2 Exterior wall covering. MCM 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 1406.4 through 1406.13.

  1406.3 Architectural trim and embellishments. MCM used as architectural trim or embellishments shall comply with Sections 1406.7 through 1406.13.

  [BS] 1406.4 Structural design. MCM systems shall be designed and constructed to resist wind loads as required by Chapter 16 for components and cladding.

  1406.5 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.

  1406.6 Weather resistance. MCM 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.

  1406.7 Durability. MCM systems shall be constructed of approved materials that maintain the performance characteristics required in Section 1406 for the duration of use.

  1406.8 Fire-resistance rating. Where MCM 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: MCM systems that are part of an exterior wall assembly not containing foam plastic insulation and 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.

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  EXTERIOR WALLS

  1406.9 Surface-burning characteristics. Unless otherwise specified, MCM shall have a flame spread index of 75 or less and a smokedeveloped index of 450 or less when tested in the maximum thickness intended for use in accordance with ASTM E84 or UL 723.

• CRC § 2.1 Medium relevance — show source text

  agency	BSC	BSC- CG	SFM	HCD	Col6	Col7	DSA	Col9	Col10	OSHPD	Col12	Col13	Col14	Col15	Col16	Col17	BSCC	DPH	AGR	DWR	CEC	CA	SL	SLC
  Adopting agency	BSC	BSC- CG	SFM	1	2	1/AC	AC	SS	SS/CC	1	1R	2	3	4	5	6	6	6	6	6	6	6	6	6
  Adopt entire chapter	X			X	X								X			X
  Adopt entire chapter as amended (amended sections listed below)								X	X	X	X	X		X	X
  Adopt only those sections that are listed below		X	X																		X
  Chapter / Section
  1401			X
  1402			X
  1402.2.1		X
  1403			X
  1404			X
  1404.1.2								X	X	X	X	X		X	X
  1404.3.3																					X
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  1408			X
  1411			X
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  1413								X	X	X	X	X		X	X

  The state agency does not adopt sections identified with the following symbol: The Office of the State Fire Marshal’s adoption of this chapter or individual sections is applicable to structures regulated by other state agencies pursuant to Section 1.11.

  2025 CALIFORNIA BUILDING CODE 14-1

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

  14-2 2025 CALIFORNIA BUILDING CODE

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

  14 EXTERIOR WALLS

  User notes:

  About this chapter: Chapter 14 addresses requirements for exterior walls of buildings. Minimum standards for wall covering materials, such as material performance and fire resistance, installation of wall coverings and the ability of the wall to provide weather protection are provided. This chapter also contains limitations on the areas and heights of combustible wall coverings based on fire separation distances, radiant heat exposure and surface burning characteristics.

• CRC § 4-1.1 Medium relevance — show source text

  Solid
  concreteh, i|4-1.1|Siliceous aggregate concrete.|7.0|6.2|5.0|3.5| |4. Solid
  concreteh, i|4-1.1|Carbonate aggregate concrete.|6.6|5.7|4.6|3.2| |4. Solid
  concreteh, i|4-1.1|Sand-lightweight concrete.|5.4|4.6|3.8|2.7| |4. Solid
  concreteh, i|4-1.1|Lightweight concrete.|5.1|4.4|3.6|2.5| |5. Glazed or
  unglazed facing
  tile, nonload-
  bearing|5-1.1|One 2" unit cored 15 percent maximum and one 4" unit cored
  25 percent maximum with3/4" mortar-filled collar joint. Unit
  positions reversed in alternate courses.|—|63/8|—|—| |5. Glazed or
  unglazed facing
  tile, nonload-
  bearing|5-1.2|One 2" unit cored 15 percent maximum and one 4" unit cored
  40 percent maximum with3/4" mortar-filled collar joint. Unit
  positions side with3/4" gypsum plaster. Two wythes tied
  together every fourth course with No. 22 gage corrugated
  metal ties.|—|63/4|—|—| |5. Glazed or
  unglazed facing
  tile, nonload-
  bearing|5-1.3|One unit with three cells in wall thickness, cored 29 percent
  maximum.|—|—|6|—| |5. Glazed or
  unglazed facing
  tile, nonload-
  bearing|5-1.4|One 2" unit cored 22 percent maximum and one 4" unit cored
  41 percent maximum with1/4" mortar-filled collar joint. Two
  wythes tied together every third course with 0.030"(No. 22
  galvanized sheet steel gage) corrugated metal ties.|—|—|6|—| |5. Glazed or
  unglazed facing
  tile, nonload-
  bearing|5-1.5|One 4" unit cored 25 percent maximum with3/4" gypsum plas-
  ter on one side.|—|—|43/4|—| |5. Glazed or
  unglazed facing
  tile, nonload-
  bearing|5-1.6|One 4" unit with two cells in wall thickness, cored 22 percent
  maximum.|—|—|—|4| |5. Glazed or
  unglazed facing
  tile, nonload-
  bearing|5-1.7|One 4" unit cored 30 percent maximum with3/4" vermiculite
  gypsum plaster on one side.|—|—|41/2|—| |5. Glazed or
  unglazed facing
  tile, nonload-
  bearing|5-1.8|One 4" unit cored 39 percent maximum with3/4" gypsum plas-
  ter on one side.|—|—|—|41/2| |6.