First, determine which climate zone your project is located in, 1 thru 16. Ductwork leakage must be HERS verified and insulated with a value of R-8 or R-11, depending on your climate zone. Climate Zones 1-5 and 8-16 Wall assemblies must not exceed a maximum U-factor† of 0.051 Climate Zones 6 & 7 Wall assemblies must not exceed a maximum U-factor† of 0.065 Mineral Wool Performance Attic Options Any attic insulation not listed under “Prescriptive” must use Performance options (e.g., unvented attics, or attics In addition, whatever roofing product you select must meet these numbers and be certified by the Cool Roof Rating Council, (CRRC). Nonwhite pigments with high near-infrared (NIR) reflectance historically have been used to camouflage military surfaces (by mimicking foliage) and to minimize solar heating of dark exterior architectural surfaces, such as colored vinyl siding and gray battleship hulls. (Excerpted from the CEC Title 24 website) For Example; Sacramento is Cl imate Zone 12, San Francisco is Climate Zone 3 and Lake Tahoe is Climate Zone 16. ft. of attic floor area, and where at least 30 percent of the free ventilation area is within two feet vertical distance of the roof ridge; or, 8. If the three year aged solar reflectance value is not available from the CRRC, then you can input the initial solar reflectance value from the CRRC into the calculation listed below which will assume an aged solar reflectance for the cool roof material. Email email@example.com or call Toll-free in California: 800-772-3300 or Outside California: 916-654-5106 for any 2019 worksheets, Building Energy Efficiency Standards - Title 24, Toll-free in California: 800-772-3300 We’ll use climate zone #8 for an example. 2. First look across the top row to find your correct climate zone for your project location. To standardize Title 24 calculations and to provide a basis for presenting the criteria, the California Energy Commission has established 16 climate zones which are used with both the low-rise residential and the non-residential Title 24 energy standards. Contact Us | Directions. Title 24 Requirements California Climate Zone 10 Reference City: Riverside . In our example we are using tile roofing with a weight greater than 5 lb/sq. Compare that to the seven zones the U.S. Department of Energy uses for the entire country. Existing ducts in the attic are insulated and sealed and HERS tested according to section 151(f) 10, or, 6. Page C-2 Appendix C - Climate Zone FIGURE 100.1-A—CALIFORNIA CLIMATE ZONES . Less than 5 lb/sq. ft. or greater than 5 lb/sq. Insulation with a thermal resistance of at least 0.85hr ft2 degree F/btu or at least 3/4 inch air-space is added to the roof deck over an attic, or, 7. Once you have these factors determined then you simply consult one of the most important tables in the new 2008 Title-24 Building Efficiency Standards, Table 151-D. Title 24 Walls: U-factor reduced to 0.048 2×6 @ 16″ OC framing – R21 cavity insulation AND R-5 continuous (in most Climate Zones). If one of the exceptions below applies then the cool roof requirements are not triggered: 1. The prescriptive tables divide roofing materials into two weight categories. Buildings in Climate Zones 10, 11, 13 and 14, R-3 or greater roof deck insulation above a vented attic, or, 5. Map of Title 24 Climate zones for the San Francisco Bay Area, including Marin, Sonoma & Napa. California Energy Commission 1516 Ninth Street Sacramento, CA 95814. With the old 2005 Title-24 energy code a residential cool roof was an optional energy efficiency measure, however on January 1, 2010, cool roofs are now required for most residential buildings in many of California’s 16 climate zones. The climate zone must be first determined before any new or renovation construction is began in order to ensure the proper efficiency energy features are used for that specific Climate Zone. Cool roof requirements for residential and non-residential now apply to low-slope and steep-slope roofs. Three year aged solar reflectance not available fro the CRRC. A radiant barrier is installed in the attic meeting the radiant barrier requirements of section 152(f) 2 of the Title-24 Standards, or. With the old 2005 Title-24 energy code a residential cool roof was an optional energy efficiency measure, however on January 1, 2010, cool roofs are now required for most residential buildings in many of California’s 16 climate zones. The 2019 Building Energy Efficiency Standards improve upon the 2016 Energy Standards for new construction of, and additions and alterations to, residential and nonresidential buildings. However, each climate The Title 24 prescriptive compliance approach requires a radiant barrier in climate zones with significant cooling loads (zones 2-15). The following Cool Roof ... New Requirements in the 2019 California Title 24 Building Energy Efficiency Standards for Retail Spaces Photo: Dialectic. Come be part of creating a clean, modern and thriving California. 75 in all climate zones. Complying with Title 24. Determine your climate zone. Alternatively you can search for your zone by county through energy.gov’s here. The state is divided into 16 different climate zones. These energy budgets are the basis for the Title 24 energy standards. Basic Climate Conditions The Title-24 prescriptive requirements divide roofs into two categories, Low Slope (less than 2:12 pitch) and Steep Slope (greater than 2:12 pitch). Latitude: 33.95 N . However there are exceptions which can be used to offset the cool roof requirement. All 16 climate zones are listed in this table across the top of the table. As a rule, lighter weight roofing material (asphalt shingles) have a lower cool roof requirements than heavier roofing products like tile roofing. Longitude: 117.38 W . Input intial solar reflectance value into the equation. If the building can show compliance using the performance approach (Title-24 calculation), The new 2008 Title-24 Manual and the separate Standards and Appendix all refer to the Cool Roof requirements but these references and tables are spread out in all three documents making it difficult to locate specific facts and figures. California Power Generation and Power Sources, 2019 Building Energy Efficiency Standards and Compliance Manuals, 2019 Building Energy Efficiency Standards for Residential and Nonresidential Buildings, 019 Nonresidential ACM Reference Manual Appendices, 2019 Residential Additions and Alterations Non-HERS Verified Forms, 2019 Residential HERS CF1R, CF2R, and CF3R Forms, 2019 Compliance Software and Alternative Calculation Method (ACM) Manuals, 2019 Building Energy Efficiency Standards Rulemaking Documents, NonResidential Standards Infographic - PDF, Acceptance Test Technician Certification Provider (ATTCP) Program, Local Ordinances Exceeding the 2019 Energy Code, Detailed answers to questions about the photovoltaic requirements, 2022 Building Energy Efficiency Standards, Climate Zone tool, maps, and information supporting the California Energy Code, 2019 Building Energy Efficiency Standards Approved Computer Compliance Programs, 2016 Building Energy Efficiency Standards, Past Building Energy Efficiency Standards. The following list of Climate Zone assignments by ZIP code is provided for the convenience of local jurisdictions electing to take this approach. The most common way of installing a radiant barrier is to use roof sheathing that has a radiant barrier bonded to it in the factory. In recent years roofing manufacturers have incorporated NIR-reflecting pigments in coatings applied to a variety of nonwhite roofing products, such as metal panels and clay tiles. Zone 1 is the coldest; zone … The performance approach does not require a radiant barrier in any climate zone. We’ve posted a helpful compilation in pdf format of all the relevant Cool Roof Title-24 code references including Table 151-D. The California Energy Commission updates the standards every three years. In climate zones, 10, 12, and 13, with 1 sq. Cool roofing materials now come in a wide variety of materials and colors. Title 24 of the California Code of Regulations is composed of 12 parts. Title 24 calculations for all California projects, energy calculations, title 24 energy compliance forms, CEPE certified Title 24 energy consultants, experienced, low rates, fast turnaround. Buildings with no ducts in the attic, or, 2. Alturas CALIFORNIA BUILDING CLIMATE ZONES South Lake Sacramento Fresno Bakersfield Barstow W E S 50 50 100 Miles SYSTEMS ASSESMENT & FACILITIES SITING DIVISION T:\Projects \CEC\Mexico\MX Border.apr VIEW: CZ Building B&W 8.5X11 LAYOUT:CZ Building B&W 8.5X11 JA3 – Time Dependent Valuation (TDV) The files listed at right include climate descriptions, design strategies, and climate data (temperature, relative humidity, degree-day, design-day, extra-terrestrial radiation, wind speed and direction) for the California climate zones as defined by Title 24. The cool roof requirements vary depending on roofing material weight. (California) Coefficient of Performance, Cooling (COP) Cities may occasionally straddle two climate zones. Buildings with at least R-30 ceiling insulation or, 4. There are 16 climate zones in the state. Recap of California Title 24 2013 Energy Code showing Mandatory Energy Code Requirements and the Package A Prescriptive Requirements for Climate Zones 11 & 12 (covering the Sacramento, Stockton, Placerville, Granite Bay, Folsom, Rocklin, Roseville, Auburn, Grass Valley, and Marysville areas). This table outlines all of the residential prescriptive requirements, including the cool roof requirements. A roof with a high solar reflectance (ability to reflect sunlight) and high thermal emittance (ability to radiate heat) stays cool in the sun, reduces demand for cooling power in conditioned buildings, and increases occupant comfort in unconditioned buildings. Replacing NIR-absorbing (“conventional”) roofing with visually similar, NIR-reflecting (“cool”) roofing can significantly reduce building heat gain. 2×4 @ 16″ OC framing – R15 cavity insulation AND R-8 continuous (in most Climate Zones). The cool roof requirements for re-roofs are the same as for new construction and use the same values from Table 151-D noted above. Each zone has a different energy efficiency requirement. Climate Zone. Established in 1978 to reduce California’s energy consumption, Title 24 Energy Standards set an energy budget for buildings based on their climate zone. Efficiency Program. Initial solar reflectance value is available from the CRRC (let’s assume an initial solar reflectance value of 0.77). That is your Cool Roof specification for your roofing product. As of January 1, 2010, the California Energy Commission’s updated Title-24 Building Energy Efficiency Standards for residential and non-residential roofing are now in force, otherwise know as “Cool-Roof”. Outside California: 916-654-5106, California Energy Commission ft. on a steep slope roof (greater than 2:12) and for climate zone #8 the cool roof requirements are an Aged Solar Reflectance of 0.15 and a Thermal Emittance of 0.75. ft. Documents and training information to help building communities and enforcement agencies comply with the Building Energy Efficiency Standards. Elevation: 840 ft . There you will select your roofing slope type and roofing weight per sq. Climate zone boundaries have changed . Title 24 Energy Standards. HVAC Sizing Though there are no limits to the actual size of the heating and cooling equipment of your next project, Title 24 does require that you properly calculate the heating and cooling load of your project. Sacramento, CA 95814. 1. HVAC Prescriptive Threshold for Economizers The economizer requirements for the 2019 BEES … Climate Zone Assignments by Zip Code Building Energy Efficiency Standards - Title 24 The USDA plant hardiness map divides North America into 11 hardiness zones. There are cool roof products sold in California that are Energy Star Certified but this does not automatically qualify the product as a CRRC certified product. to adjust the Title 24 climate zone weather data to match the ASHRAE design day conditions for a speciﬁc city. Refer to the requirements for each building envelope area, based on your project’s Climate Zone IECC 2015 Requirements by Climate Zone 3. The California Energy Commission has divided the state into 16 climate zones, each with its own requirements. ft. free ventilation area of attic ventilation for every 150 sq. Requiring measures by climate zone ensure that a building will have the most energy efficient features for that area. Buildings whose permit applications are dated on or after January 1, 2020, must comply with the 2019 Standards. The 2016 Standards took effect January 1, 2017. For Example; Sacramento is Climate Zone 12, San Francisco is Climate Zone 3 and Lake Tahoe is Climate Zone 16. The California Energy Commission adopted building standards that require solar photovoltaic systems starting in 2020. Building Energy Efficiency Standards - Title 24 Contact. Additionally, roofing products used for meeting the Title 24, Part 6 requirements must be rated and labeled by the CRRC (see section 10-113 of Title 24, Part 6). The California Energy Commission updates the Building Energy Efficiency Standards every three years. The climate zones are based on energy use, temperature, weather and other factors.This is explained in the Title 24 energy efficiency standards glossary section:"The Energy Commission established 16 climate zones that represent a geographic area for which an energy budget is established. Of 24 climate zones defined in the Sunset Western Garden Book and the 20 zones defined by the United States Department of Agriculture (USDA), California has 20 and 16, respectively. The state of California is divided into 16 different climate zones. Products being used to comply with the Building Energy Efficiency Standards (California Code of Regulations, title 24, part 1, chapter 10, and part 6) may not necessarily meet all requirements in Title 24, so advertising should not make broad statements about Title Cool roof standards are designed to reduce air conditioner demand, save money, and reduce the urban heat island effect. These requirements apply to nonresidential, high-rise residential, and low-rise residential buildings across California’s 16 climate zones. 1516 Ninth Street Table 151-D is divided into the 16 unique California Climate Zones with their own specific building component requirements per climate zone. 3. Title 24 Express. The new Cool Roof requirements affect new construction, significant repairs of existing roofs, re-roofing, plus additions and alterations of existing buildings and homes. In developing and implementing Title 24 building energy efﬁciency standards, the Commission deﬁned sixteen climate zones to represent the diversity of California’s climate regions. Wall energy performance criteria in Title 24 require meeting certain R-values and U-factors. The 2016 Building Energy Efficiency Standards apply to new construction of, and additions and alterations to, residential and nonresidential buildings. Careers. California has 16 climate zones for the purposes of state codes and standards (source: LBNL-Heat Island Group) In California, all new or replacement low-slope roofs are required by the building energy efficiency standards (Title 24) to be cool roofs, as are steep-slope roofs in several California climate zones. Manual describes each climate zone boundaries and list most California cities with its associated climate zone number. Call (888)828-9488 for a free consultation. Effective January 1, 2010 the Standards will require that a Cool Roof material meet an aged solar reflectance value (3 year testing) provided by the Cool Roof Rating Council (CRRC): www.coolroofs.org. The ages solar reflectance and thermal emittance requirements will vary, depending on the slope of the roof, climate zone, and the density of the roofing product. Each zone has a different energy efficiency requirement shown as a “U-factor”. Cool roof requirements are triggered when either 50 percent of the roof area or more than 1,000 sq. TITLE 24, PART 6, AND ASSOCIATED ADMINISTRATIVE REGULATIONS IN PART 1. ft., whichever is less is replaced. The cool roof requirements vary depending on the climate zone. ft. Then simply move to the right in the table until you see the Cool Roof requirements for your climate zone. DECEMBER 2018 ... that vary by climate zone (of which there are 16 in California) and building ... JA2 – Reference Weather/Climate Data . For climate zones 11 and 12 simply look across the table and then follow each column down the list for the minimum required energy feature. The performance of the building components, including the roof, must meet the minimum levels of energy efficiency. A couple of the difficult design areas of the "Prescriptive Package" requirements are: 5% glazing on the West facing wall of the home Then, determine the weight of the roofing material. The Energy Commission established 16 climate zones that represent a geographic area for which an energy budget is established. Appendix C. Energy Standards Climate Zones; Appendix D. Demand Responsive Controls; Categories Topic. Building Energy Efficiency Standards - Title 24 2022 Building Energy Efficiency Standards Climate Zone tool, maps, and information supporting the California Energy Code 2019 Building Energy Efficiency Standards, News Release: 2019 Building Standards Adoption. Next, determine your roof slope. Cities and California Climate Zone 8 Keywords: California Climate Zone 8, Basic Climate Conditions, Design Day Data, Climatic Design Priorities, Title 24 Requirements, Climate, Bioclimatic Chart, Temperature, Temperature, Relative Humidity, Extra-Terrestrial Radiation, Wind Speed, Prevailing Wind Direction Created Date: 11/9/2015 11:35:29 AM Zone exhaust and makeup airflow rates shall be capable of reducing to regulated minimum circulation rates or rate necessary to maintain pressurization, whichever is larger . There are exceptions to both residential and non-residential requirements. Title 24 is the section of the California Code of Regulations which sets the Building Standards Code for the State of California. Here is an example of how to complete the calculation: [0.2 + 0.7 (initial solar reflectance – 0.2], [0.2 + 0.40] = 0.60 aged solar reflectance, California Votes to Require Solar PV for new homes by 2020, New Title-24 residential ventilation requirements, Santa Monica adopts Zero Net Energy Code for all new single family construction. Then go down along the left hand column until you come to “Roofing Products”. The Climate Zone Map, and its implications on the cost-effectiveness of implementation, must be reviewed if a local government wishes to adopt local standards for energy efficiency beyond those set by Title 24 and have those standards approved and made enforceable by the CEC. All roofing products must be certified and labeled according to the Cool Roof Rating Council (CRRC) to comply with the Standards.
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