Copyright

Preface

Acknowledgements

Legend for Agency Adoptions

Effective Use of This Code

California Code of Regulations, Title 24

Chapter 1 Administration

Chapter 2 Definitions

Chapter 3 Green Building

Chapter 4 Residential Mandatory Measures

Division 4.1 PLANNING AND DESIGN
Division 4.2 ENERGY EFFICIENCY
Division 4.3 WATER EFFICIENCY AND CONSERVATION
Division 4.4 MATERIAL CONSERVATION AND RESOURCE EFFICIENCY
Division 4.5 ENVIRONMENTAL QUALITY

Chapter 5 Nonresidential Mandatory Measures

Chapter 6 Referenced Organizations and Standards

Chapter 7 Installer and Special Inspector Qualifications

Chapter 8 Compliance Forms, Worksheets and Reference Material

Appendix A4 Residential Voluntary Measures

Appendix A5 Nonresidential Voluntary Measures

Appendix A6.1 – Voluntary Standards for Health Facilities [OSHPD 1, 2 & 4]

History Note Appendix

Division 4.1 PLANNING AND DESIGN

The provisions of this division outline planning, design and development methods that include environmentally responsible site selection, building design, building siting and development to protect, restore and enhance the environmental quality of the site and respect the integrity of adjacent properties.

The following terms are defined in Chapter 2.

FRENCH DRAIN.

WATTLES.

(Reserved)

(Reserved)

(Reserved)

Preservation and use of available natural resources shall be accomplished through evaluation and careful planning to minimize negative effects on the site and adjacent areas. Preservation of slopes, management of storm water drainage and erosion controls shall comply with this section.

Projects which disturb less than one acre of soil and are not part of a larger common plan of development which in total disturbs one acre or more, shall manage storm water drainage during construction. In order to manage storm water drainage during construction, one or more of the following measures shall be implemented to prevent flooding of adjacent property, prevent erosion and retain soil runoff on the site.

  1. Retention basins of sufficient size shall be utilized to retain storm water on the site.
  2. Where storm water is conveyed to a public drainage system, collection point, gutter or similar disposal method, water shall be filtered by use of a barrier system, wattle or other method approved by the enforcing agency.
  3. Compliance with a lawfully enacted storm water management ordinance.

Construction plans shall indicate how the site grading or drainage system will manage all surface water flows to keep water from entering buildings. Examples of methods to manage surface water include, but are not limited to, the following:

  1. Swales
  2. Water collection and disposal systems
  3. French drains
  4. Water retention gardens
  5. Other water measures which keep surface water away from buildings and aid in groundwater recharge.

Exception: Additions and alterations not altering the drainage path.

New construction shall comply with Sections 4.106.4.1 and 4.106.4.2 to facilitate future installation and use of EV chargers. Electric vehicle supply equipment (EVSE) shall be installed in accordance with the California Electrical Code, Article 625.

Exceptions: On a case-by-case basis, where the local enforcing agency has determined EV charging and infrastructure are not feasible based upon one or more of the following conditions:

  1. Where there is no commercial power supply.
  2. Where there is evidence substantiating that meeting the requirements will alter the local utility infrastructure design requirements on the utility side of the meter so as to increase the utility side cost to the homeowner or the developer by more than $400.00 per dwelling unit.
For each dwelling unit, install a listed raceway to accommodate a dedicated 208/240-volt branch circuit. The raceway shall not be less than trade size 1 (nominal 1-inch inside diameter). The raceway shall originate at the main service or subpanel and shall terminate into a listed cabinet, box or other enclosure in close proximity to the proposed location of an EV charger. Raceways are required to be continuous at enclosed, inaccessible or concealed areas and spaces. The service panel and/or subpanel shall provide capacity to install a 40-ampere minimum dedicated branch circuit and space(s) reserved to permit installation of a branch circuit overcurrent protective device.
The service panel or subpanel circuit directory shall identify the overcurrent protective device space(s) reserved for future EV charging as “EV CAPABLE”. The raceway termination location shall be permanently and visibly marked as “EV CAPABLE”.

Where 17 or more multifamily dwelling units are constructed on a building site, 3 percent of the total number of parking spaces pro-vided for all types of parking facilities, but in no case less than one, shall be electric vehicle charging spaces (EV spaces) capable of supporting future EVSE. Calculations for the required number of EV spaces shall be rounded up to the nearest whole number.

Note: Construction documents are intended to demonstrate the project’s capability and capacity for facilitating future EV charging. There is no requirement for EV spaces to be constructed or available until EV chargers are installed for use.

Construction documents shall indicate the location of proposed EV spaces. At least one EV space shall be located in common use areas and available for use by all residents.

When EV chargers are installed, EV spaces required by Section 4.106.4.2.2, Item 3, shall comply with at least one of the following options:

  1. The EV space shall be located adjacent to an accessible parking space meeting the requirements of the California Building Code, Chapter 11A, to allow use of the EV charger from the accessible parking space.
  2. The EV space shall be located on an accessible route, as defined in the California Building Code, Chapter 2, to the building.

The EV spaces shall be designed to comply with the following:

  1. The minimum length of each EV space shall be 18 feet (5486 mm).
  2. The minimum width of each EV space shall be 9 feet (2743 mm).
  3. One in every 25 EV spaces, but not less than one, shall also have an 8-foot (2438 mm) wide minimum aisle. A 5-foot (1524 mm) wide minimum aisle shall be permitted provided the minimum width of the EV space is 12 feet (3658 mm).

    1. Surface slope for this EV space and the aisle shall not exceed 1 unit vertical in 48 units horizontal (2.083 percent slope) in any direction.
Install a listed raceway capable of accommodating a 208/240-volt dedicated branch circuit. The raceway shall not be less than trade size 1 (nominal 1-inch inside diameter). The raceway shall originate at the main service or subpanel and shall terminate into a listed cabinet, box or enclosure in close proximity to the proposed location of the EV spaces. Construction documents shall identify the raceway termination point. The service panel and/or subpanel shall provide capacity to install a 40-ampere minimum dedicated branch circuit and space(s) reserved to permit installation of a branch circuit overcurrent protective device.
Construction documents shall indicate the raceway termination point and proposed location of future EV spaces and EV chargers. Construction documents shall also provide information on amperage of future EVSE, raceway method(s), wiring schematics and electrical load calculations to verify that the electrical panel service capacity and electrical system, including any on-site distribution transformer(s), have sufficient capacity to simultaneously charge all EVs at all required EV spaces at the full rated amperage of the EVSE. Plan design shall be based upon a 40-ampere minimum branch circuit. Raceways and related components that are planned to be installed underground, enclosed, inaccessible or in concealed areas and spaces shall be installed at the time of original construction.

The service panel or subpanel circuit directory shall identify the overcurrent protective device space(s) reserved for future EV charging purposes as “EV CAPABLE” in accordance with the California Electrical Code

Notes:

  1. The California Department of Transportation adopts and publishes the “California Manual on Uniform Traffic Control Devices (California MUTCD)” to provide uniform standards and specifications for all official traffic control devices in California. Zero Emission Vehicle Signs and Pavement Markings can be found in the New Policies & Directives Number 13-01. Website: http://www.dot.ca.gov/trafficops/policy/13-01.pdf
  2. See Vehicle Code Section 22511 for EV charging space signage in off-street parking facilities and for use of EV charging spaces.
  3. The Governor’s Office of Planning and Research (OPR) published a “Zero-Emission Vehicle Community Readiness Guidebook” which provides helpful information for local governments, residents and businesses. Website: http://opr.ca.gov/docs/ZEV_Guidebook.pdf.

Division 4.2 ENERGY EFFICIENCY

For the purposes of mandatory energy efficiency standards in this code, the California Energy Commission will continue to adopt mandatory standards.

Division 4.3 WATER EFFICIENCY AND CONSERVATION

The provisions of this chapter shall establish the means of conserving water used indoors, outdoors and in wastewater conveyance.
Reserved.
Plumbing fixtures (water closets and urinals) and fittings (faucets and showerheads) shall comply with the following:

The effective flush volume of all water closets shall not exceed 1.28 gallons per flush. Tank-type water closets shall be certified to the performance criteria of the U.S. EPA WaterSense Specification for Tank-type Toilets.

Note: The effective flush volume of dual flush toilets is defined as the composite, average flush volume of two reduced flushes and one full flush.

The effective flush volume of wall-mounted urinals shall not exceed 0.125 gallons per flush. The effective flush volume of all other urinals shall not exceed 0.5 gallons per flush.
Showerheads shall have a maximum flow rate of not more than 2.0 gallons per minute at 80 psi. Showerheads shall be certified to the performance criteria of the U.S. EPA WaterSense Specification for Showerheads.

When a shower is served by more than one showerhead, the combined flow rate of all shower-heads and/or other shower outlets controlled by a single valve shall not exceed 2.0 gallons per minute at 80 psi, or the shower shall be designed to allow only one shower outlet to be in operation at a time.

Note: A hand-held shower shall be considered a showerhead.

The maximum flow rate of residential lavatory faucets shall not exceed 1.2 gallons per minute at 60 psi. The minimum flow rate of residential lavatory faucets shall not be less than 0.8 gallons per minute at 20 psi.
The maximum flow rate of lavatory faucets installed in common and public use areas (outside of dwellings or sleeping units) in residential buildings shall not exceed 0.5 gallons per minute at 60 psi.
Metering faucets when installed in residential buildings shall not deliver more than 0.25 gallons per cycle.

The maximum flow rate of kitchen faucets shall not exceed 1.8 gallons per minute at 60 psi. Kitchen faucets may temporarily increase the flow above the maximum rate, but not to exceed 2.2 gallons per minute at 60 psi, and must default to a maximum flow rate of 1.8 gallons per minute at 60 psi.

Note: Where complying faucets are unavailable, aerators or other means may be used to achieve reduction.

Plumbing fixtures and fittings shall be installed in accordance with the California Plumbing Code, and shall meet the applicable standards referenced in Table 1701.1 of the California Plumbing Code.

After December 1, 2015, new residential developments with an aggregate landscape area equal to or greater than 500 square feet shall comply with one of the following options:

  1. A local water efficient landscape ordinance or the current California Department of Water Resources’ Model Water Efficient Landscape Ordinance (MWELO), whichever is more stringent; or
  2. Projects with aggregate landscape areas less than 2,500 square feet may comply with the MWELO’s Appendix D Prescriptive Compliance Option.

Notes:

  1. The Model Water Efficient Landscape Ordinance (MWELO) and supporting documents are available at: http://www.water.ca.gov/wateruseefficiency/landscapeordinance/
  2. A water budget calculator is available at: http://www.water.ca.gov/wateruseefficiency/landscapeordinance/

(Reserved)

Division 4.4 MATERIAL CONSERVATION AND RESOURCE EFFICIENCY

The provisions of this chapter shall outline means of achieving material conservation and resource efficiency through protection of buildings from exterior moisture; construction waste diversion; employment of techniques to reduce pollution through recycling of materials; and building commissioning or testing, adjusting and balancing.
Reserved.

(Reserved)

(Reserved)

(Reserved)

Annular spaces around pipes, electric cables, conduits or other openings in sole/bottom plates at exterior walls shall be protected against the passage of rodents by closing such openings with cement mortar, concrete masonry or a similar method acceptable to the enforcing agency.

(Reserved)

Recycle and/or salvage for reuse a minimum of 65 percent of the nonhazardous construction and demolition waste in accordance with either Section 4.408.2, 4.408.3 or 4.408.4, or meet a more stringent local construction and demolition waste management ordinance.

Exceptions:

  1. Excavated soil and land-clearing debris.
  2. Alternate waste reduction methods developed by working with local agencies if diversion or recycle facilities capable of compliance with this item do not exist or are not located reasonably close to the jobsite.
  3. The enforcing agency may make exceptions to the requirements of this section when isolated jobsites are located in areas beyond the haul boundaries of the diversion facility.

Submit a construction waste management plan in conformance with Items 1 through 5. The construction waste management plan shall be updated as necessary and shall be available during construction for examination by the enforcing agency.

  1. Identify the construction and demolition waste materials to be diverted from disposal by recycling, reuse on the project or salvage for future use or sale.
  2. Specify if construction and demolition waste materials will be sorted on-site (source-separated) or bulk mixed (single stream).
  3. Identify diversion facilities where the construction and demolition waste material will be taken.
  4. Identify construction methods employed to reduce the amount of construction and demolition waste generated.
  5. Specify that the amount of construction and demolition waste materials diverted shall be calculated by weight or volume, but not by both.

Utilize a waste management company, approved by the enforcing agency, which can provide verifiable documentation that the percentage of construction and demolition waste material diverted from the landfill complies with Section 4.408.1.

Note: The owner or contractor may make the determination if the construction and demolition waste materials will be diverted by a waste management company.

Projects that generate a total combined weight of construction and demolition waste disposed of in landfills, which do not exceed 3.4 pounds per square foot of the building area shall meet the minimum 65 percent construction waste reduction requirement in Section 4.408.1.
Projects that generate a total combined weight of construction and demolition waste disposed of in landfills, which do not exceed 2 pounds per square foot of the building area, shall meet the minimum 65-percent construction waste reduction requirement in Section 4.408.1.

Documentation shall be provided to the enforcing agency which demonstrates compliance with Section 4.408.2, Items 1 through 5, Section 4.408.3 or Section 4.408.4.

Notes:

  1. Sample forms found in “A Guide to the California Green Building Standards Code (Residential)” located at www.hcd.ca.gov/CALGreen.html may be used to assist in documenting compliance with this section.
  2. Mixed construction and demolition debris (C&D) processors can be located at the California Department of Resources Recycling and Recovery (CalRecycle).

(Reserved)

At the time of final inspection, a manual, compact disc, web-based reference or other media acceptable to the enforcing agency which includes all of the following shall be placed in the building:

  1. Directions to the owner or occupant that the manual shall remain with the building throughout the life cycle of the structure.
  2. Operation and maintenance instructions for the following:

    1. Equipment and appliances, including water-saving devices and systems, HVAC systems, photovoltaic systems, electric vehicle chargers, water-heating systems and other major appliances and equipment.
    2. Roof and yard drainage, including gutters and downspouts.
    3. Space conditioning systems, including condensers and air filters.
    4. Landscape irrigation systems.
    5. Water reuse systems.
  3. Information from local utility, water and waste recovery providers on methods to further reduce resource consumption, including recycle programs and locations.
  4. Public transportation and/or carpool options available in the area.
  5. Educational material on the positive impacts of an interior relative humidity between 30–60 percent and what methods an occupant may use to maintain the relative humidity level in that range.
  6. Information about water-conserving landscape and irrigation design and controllers which conserve water.
  7. Instructions for maintaining gutters and downspouts and the importance of diverting water at least 5 feet away from the foundation.
  8. Information on required routine maintenance measures, including, but not limited to, caulking, painting, grading around the building, etc.
  9. Information about state solar energy and incentive programs available.
  10. A copy of all special inspection verifications required by the enforcing agency or this code.

Where 5 or more multifamily dwelling units are constructed on a building site, provide readily accessible area(s) that serves all buildings on the site and is identified for the depositing, storage and collection of non-hazardous materials for recycling, including (at a minimum) paper, corrugated cardboard, glass, plastics, organic waste, and metals, or meet a lawfully enacted local recycling ordinance, if more restrictive.

Exception: Rural jurisdictions that meet and apply for the exemption in Public Resources Code Section 42649.82 (a)(2)(A) et seq. are not required to comply with the organic waste portion of this section.

Division 4.5 ENVIRONMENTAL QUALITY

The provisions of this chapter shall outline means of reducing the quantity of air contaminants that are odorous, irritating and/or harmful to the comfort and well-being of a building’s installers, occupants and neighbors.

The following terms are defined in Chapter 2.

AGRIFIBER PRODUCTS.

COMPOSITE WOOD PRODUCTS.

DIRECT-VENT APPLIANCE.

MAXIMUM INCREMENTAL REACTIVITY (MIR).

MOISTURE CONTENT.

PRODUCT-WEIGHTED MIR (PWMIR).

REACTIVE ORGANIC COMPOUND (ROC).

VOC.

Any installed gas fireplace shall be a direct-vent sealed-combustion type. Any installed woodstove or pellet stove shall comply with U.S. EPA New Source Performance Standards (NSPS) emission limits as applicable, and shall have a permanent label indicating they are certified to meet the emission limits. Woodstoves, pellet stoves and fireplaces shall also comply with applicable local ordinances.

At the time of rough installation, during storage on the construction site and until final startup of the heating, cooling and ventilating equipment, all duct and other related air distribution component openings shall be covered with tape, plastic, sheetmetal or other methods acceptable to the enforcing agency to reduce the amount of water, dust and debris, which may enter the system.

TABLE 4.504.1

ADHESIVE VOC LIMIT1, 2 Less Water and Less Exempt Compounds in Grams per Liter

ARCHITECTURAL APPLICATIONSVOC LIMIT
Indoor carpet adhesives50
Carpet pad adhesives50
Outdoor carpet adhesives150
Wood flooring adhesive100
Rubber floor adhesives60
Subfloor adhesives50
Ceramic tile adhesives65
VCT and asphalt tile adhesives50
Drywall and panel adhesives50
Cove base adhesives50
Multipurpose construction adhesives70
Structural glazing adhesives100
Single-ply roof membrane adhesives250
Other adhesives not specifically listed50
SPECIALTY APPLICATIONS
PVC welding510
CPVC welding490
ABS welding325
Plastic cement welding250
Adhesive primer for plastic550
Contact adhesive80
Special purpose contact adhesive250
Structural wood member adhesive140
Top and trim adhesive250
SUBSTRATE SPECIFIC APPLICATIONS
Metal to metal30
Plastic foams50
Porous material (except wood)50
Wood30
Fiberglass80
  1. If an adhesive is used to bond dissimilar substrates together, the adhesive with the highest VOC content shall be allowed.
  2. For additional information regarding methods to measure the VOC content specified in this table, see South Coast Air Quality Management District Rule 1168.

Finish materials shall comply with this section.

TABLE 4.504.2

SEALANT VOC LIMIT Less Water and Less Exempt Compounds in Grams per Liter

SEALANTSVOC LIMIT
Architectural250
Marine deck760
Nonmembrane roof300
Roadway250
Single-ply roof membrane450
Other420
SEALANT PRIMERS
Architectural
Nonporous250
Porous250
Modified bituminous500
Marine deck760
Other750

Adhesives, sealants and caulks used on the project shall meet the requirements of the following standards unless more stringent local or regional air pollution or air quality management district rules apply:

  1. Adhesives, adhesive bonding primers, adhesive primers, sealants, sealant primers, and caulks shall comply with local or regional air pollution control or air quality management district rules where applicable or SCAQMD Rule 1168 VOC limits, as shown in Table 4.504.1 or 4.504.2, as applicable. Such products also shall comply with the Rule 1168 prohibition on the use of certain toxic compounds (chloroform, ethylene dichloride, methylene chloride, perchloroethylene and trichloroethylene), except for aerosol products, as specified in Subsection 2 below.
  2. Aerosol adhesives, and smaller unit sizes of adhesives, and sealant or caulking compounds (in units of product, less packaging, which do not weigh more than 1 pound and do not consist of more than 16 fluid ounces) shall comply with statewide VOC standards and other requirements, including prohibitions on use of certain toxic compounds, of California Code of Regulations, Title 17, commencing with Section 94507.
Architectural paints and coatings shall comply with VOC limits in Table 1 of the ARB Architectural Suggested Control Measure, as shown in Table 4.504.3, unless more stringent local limits apply. The VOC content limit for coatings that do not meet the definitions for the specialty coatings categories listed in Table 4.504.3 shall be determined by classifying the coating as a Flat, Nonflat or Nonflat-high Gloss coating, based on its gloss, as defined in subsections 4.21, 4.36, and 4.37 of the 2007 California Air Resources Board, Suggested Control Measure, and the corresponding Flat, Nonflat or Nonflat-high Gloss VOC limit in Table 4.504.3 shall apply.
Aerosol paints and coatings shall meet the Product-weighted MIR Limits for ROC in Section 94522(a)(2) and other requirements, including prohibitions on use of certain toxic compounds and ozone depleting substances, in Sections 94522(e)(1) and (f)(1) of California Code of Regulations, Title 17, commencing with Section 94520; and in areas under the jurisdiction of the Bay Area Air Quality Management District additionally comply with the percent VOC by weight of product limits of Regulation 8, Rule 49.

Verification of compliance with this section shall be provided at the request of the enforcing agency. Documentation may include, but is not limited to, the following:

  1. Manufacturer’s product specification.
  2. Field verification of on-site product containers.

All carpet installed in the building interior shall meet the testing and product requirements of one of the following:

  1. Carpet and Rug Institute’s Green Label Plus Program.
  2. California Department of Public Health, “Standard Method for the Testing and Evaluation of Volatile Organic Chemical Emissions from Indoor Sources Using Environmental Chambers,” Version 1.1, February 2010 (also known as Specification 01350.)
  3. NSF/ANSI 140 at the Gold level.
  4. Scientific Certifications Systems Indoor Advantage™ Gold.

TABLE 4.504.3

VOC CONTENT LIMITS FOR ARCHITECTURAL COATINGS2, 3 Grams of VOC per Liter of Coating, Less Water and Less Exempt Compounds

COATING CATEGORYVOC LIMIT
Flat coatings50
Nonflat coatings100
Nonflat-high gloss coatings150
SPECIALTY COATINGS
Aluminum roof coatings400
Basement specialty coatings400
Bituminous roof coatings50
Bituminous roof primers350
Bond breakers350
Concrete curing compounds350
Concrete/masonry sealers100
Driveway sealers50
Dry fog coatings150
Faux finishing coatings350
Fire resistive coatings350
Floor coatings100
Form-release compounds250
Graphic arts coatings (sign paints)500
High temperature coatings420
Industrial maintenance coatings250
Low solids coatings1120
Magnesite cement coatings450
Mastic texture coatings100
Metallic pigmented coatings500
Multicolor coatings250
Pretreatment wash primers420
Primers, sealers, and undercoaters100
Reactive penetrating sealers350
Recycled coatings250
Roof coatings50
Rust preventative coatings250
Shellacs
Clear730
Opaque550
Specialty primers, sealers and undercoaters100
Stains250
Stone consolidants450
Swimming pool coatings340
Traffic marking coatings100
Tub and tile refinish coatings420
Waterproofing membranes250
Wood coatings275
Wood preservatives350
Zinc-rich primers340
  1. Grams of VOC per liter of coating, including water and including exempt compounds.
  2. The specified limits remain in effect unless revised limits are listed in subsequent columns in the table.
  3. Values in this table are derived from those specified by the California Air Resources Board, Architectural Coatings Suggested Control Measure, February 1, 2008. More information is available from the Air Resources Board.
All carpet cushion installed in the building interior shall meet the requirements of the Carpet and Rug Institute’s Green Label program.
All carpet adhesive shall meet the requirements of Table 4.504.1.

Where resilient flooring is installed, at least 80 percent of floor area receiving resilient flooring shall comply with one or more of the following:

  1. Products compliant with the California Department of Public Health, “Standard Method for the Testing and Evaluation of Volatile Organic Chemical Emissions from Indoor Sources Using Environmental Chambers,” Version 1.1, February 2010 (also known as Specification 01350), certified as a CHPS Low-Emitting Material in the Collaborative for High Performance Schools (CHPS) High Performance Products Database.
  2. Products certified under UL GREENGUARD Gold (formerly the Greenguard Children & Schools program).
  3. Certification under the Resilient Floor Covering Institute (RFCI) FloorScore program.
  4. Meet the California Department of Public Health, “Standard Method for the Testing and Evaluation of Volatile Organic Chemical Emissions from Indoor Sources Using Environmental Chambers,” Version 1.1, February 2010 (also known as Specification 01350).

Hardwood plywood, particleboard and medium density fiberboard composite wood products used on the interior or exterior of the building shall meet the requirements for formaldehyde as specified in ARB’s Air Toxics Control Measure for Composite Wood (17 CCR 93120 et seq.), by or before the dates specified in those sections, as shown in Table 4.504.5.

TABLE 4.504.5

FORMALDEHYDE LIMITS1 Maximum Formaldehyde Emissions in Parts per Million

PRODUCTCURRENT LIMIT
Hardwood plywood veneer core0.05
Hardwood plywood composite core0.05
Particleboard0.09
Medium density fiberboard0.11
Thin medium density fiberboard20.13
  1. Values in this table are derived from those specified by the California Air Resources Board, Air Toxics Control Measure for Composite Wood as tested in accordance with ASTM E1333. For additional information, see California Code of Regulations, Title 17, Sections 93120 through 93120.12.
  2. Thin medium density fiberboard has a maximum thickness of 5/16 inch (8 mm).

Verification of compliance with this section shall be provided as requested by the enforcing agency. Documentation shall include at least one of the following:

  1. Product certifications and specifications.
  2. Chain of custody certifications.
  3. Product labeled and invoiced as meeting the Composite Wood Products regulation (see CCR, Title 17, Section 93120, et seq.).
  4. Exterior grade products marked as meeting the PS-1 or PS-2 standards of the Engineered Wood Association, the Australian AS/NZS 2269, European 636 3S, and Canadian CSA O121, CSA O151, CSA O153 and CSA O325 standards.
  5. Other methods acceptable to the enforcing agency.
Buildings shall meet or exceed the provisions of the California Building Standards Code.
Concrete slab foundations required to have a vapor retarder by the California Building Code Chapter 19 or concrete slab-on-ground floors required to have a vapor retarder by the California Residential Code, Chapter 5, shall also comply with this section.

A capillary break shall be installed in compliance with at least one of the following:

  1. A 4-inch-thick (101.6 mm) base of 1/2 inch (12.7 mm) or larger clean aggregate shall be provided with a vapor retarder in direct contact with concrete and a concrete mix design, which will address bleeding, shrinkage, and curling, shall be used. For additional information, see American Concrete Institute, ACI 302.2R-06.
  2. Other equivalent methods approved by the enforcing agency.
  3. A slab design specified by a licensed design professional.

Building materials with visible signs of water damage shall not be installed. Wall and floor framing shall not be enclosed when the framing members exceed 19-percent moisture content. Moisture content shall be verified in compliance with the following:

  1. Moisture content shall be determined with either a probe-type or contact-type moisture meter. Equivalent moisture verification methods may be approved by the enforcing agency and shall satisfy requirements found in Section 101.8 of this code.
  2. Moisture readings shall be taken at a point 2 feet (610 mm) to 4 feet (1219 mm) from the grade stamped end of each piece to be verified.
  3. At least three random moisture readings shall be performed on wall and floor framing with documentation acceptable to the enforcing agency provided at the time of approval to enclose the wall and floor framing.

Insulation products which are visibly wet or have a high moisture content shall be replaced or allowed to dry prior to enclosure in wall or floor cavities. Wet-applied insulation products shall follow the manufacturers’ drying recommendations prior to enclosure.

Each bathroom shall be mechanically ventilated and shall comply with the following:

  1. Fans shall be ENERGY STAR compliant and be ducted to terminate outside the building.
  2. Unless functioning as a component of a whole house ventilation system, fans must be controlled by a humidity control.

    1. Humidity controls shall be capable of adjustment between a relative humidity range of ≤ 50 percent to a maximum of 80 percent. A humidity control may utilize manual or automatic means of adjustment.
    2. A humidity control may be a separate component to the exhaust fan and is not required to be integral (i.e., built-in).

Notes:

  1. For the purposes of this section, a bathroom is a room which contains a bathtub, shower, or tub/ shower combination.
  2. Lighting integral to bathroom exhaust fans shall comply with the California Energy Code.

Heating and air-conditioning systems shall be sized, designed and have their equipment selected using the following methods:

  1. The heat loss and heat gain is established according to ANSI/ACCA 2 Manual J—2011 (Residential Load Calculation), ASHRAE handbooks or other equivalent design software or methods.
  2. Duct systems are sized according to ANSI/ACCA 1 Manual D—2014 (Residential Duct Systems), ASHRAE handbooks or other equivalent design software or methods.
  3. Select heating and cooling equipment according to ANSI/ACCA 3 Manual S—2014 (Residential Equipment Selection) or other equivalent design software or methods.

Exception: Use of alternate design temperatures necessary to ensure the systems function are acceptable.

(Reserved)

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