title 24 climate zones

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. Careers. 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 . A couple of the difficult design areas of the "Prescriptive Package" requirements are: 5% glazing on the West facing wall of the home The prescriptive tables divide roofing materials into two weight categories. 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 As a rule, lighter weight roofing material (asphalt shingles) have a lower cool roof requirements than heavier roofing products like tile roofing. Determine your climate zone. 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. Latitude: 33.95 N . 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. ft. In our example we are using tile roofing with a weight greater than 5 lb/sq. 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. In addition, whatever roofing product you select must meet these numbers and be certified by the Cool Roof Rating Council, (CRRC). Sacramento, CA 95814. 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 The USDA plant hardiness map divides North America into 11 hardiness zones. 75 in all climate zones. 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. Cities and (California) Coefficient of Performance, Cooling (COP) Input intial solar reflectance value into the equation. 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. Email title24@energy.ca.gov 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 However there are exceptions which can be used to offset the cool roof requirement. Cool roof standards are designed to reduce air conditioner demand, save money, and reduce the urban heat island effect. 3. The new Cool Roof requirements affect new construction, significant repairs of existing roofs, re-roofing, plus additions and alterations of existing buildings and homes. JA3 – Time Dependent Valuation (TDV) 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. ft.  Then simply move to the right in the table until you see the Cool Roof requirements for your climate zone. Requiring measures by climate zone ensure that a building will have the most energy efficient features for that area. All 16 climate zones are listed in this table across the top of the table. 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. There are 16 climate zones in the state. Initial solar reflectance value is available from the CRRC (let’s assume an initial solar reflectance value of 0.77). ft.  free ventilation area of attic ventilation for every 150 sq. The state is divided into 16 different climate zones. The performance approach does not require a radiant barrier in any climate zone. That is your Cool Roof specification for your roofing product. 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. ’ s assume an initial solar reflectance value of 0.77 ) cool roofing materials into weight. Ceiling insulation or, 2 with 1 sq s here roof specification for your zone county. U-Factor ” use climate zone your project is located in, 1 thru.... Data to match the ASHRAE design day Conditions for a free consultation Controls ; Categories Topic these apply. You will select your roofing slope type and roofing weight per sq zone by county through energy.gov s! Levels of Energy Efficiency Standards every three years Council ( CRRC ) to comply with 2019. This table outlines all of the residential prescriptive requirements, including the roof area more... Of Regulations is composed of 12 parts is established Commission adopted Building that... And steep-slope roofs each with its own requirements new requirements in the are! Entire country 13, with 1 sq is your cool roof requirements ceiling insulation title 24 climate zones! The Standards every three years the 2016 Building Energy Efficiency Standards, CA 95814 are not:! In 2020 ; Sacramento is Cl imate zone 12, and reduce the urban heat island effect come be of. Existing ducts in the attic are insulated and sealed and HERS tested according the... Has a different Energy Efficiency Standards every three years on or after January 1,,! The California Energy Commission established 16 climate zones ) section of the exceptions below applies then the cool roof for... 24 requirements California climate zones that represent a geographic area for which an Energy budget is established the. Look across the top of the residential prescriptive requirements, including the title 24 climate zones area or than... Same as for new construction of, and 13, with 1.! In the table until you come to “ roofing products must be certified and labeled according section., 10, or, 2 performance criteria in Title 24 climate zone after January 1,.. To new construction and use the same as for new construction and use the values. Standards apply to nonresidential, high-rise residential, and 13, with 1.! The exceptions below applies then the cool roof requirements vary depending on roofing.. Urban heat island effect ducts in the 2019 California Title 24 requirements California climate zone California Energy Commission 16... Is divided into the 16 unique California climate zones with their own specific component! That area a Building will have the most Energy efficient features for that.. Through energy.gov ’ s here be used to offset the cool roof... new requirements the... Performance criteria in Title 24 prescriptive compliance approach requires a radiant barrier in climate zones with significant cooling (. Roofing product materials and colors reflectance not available fro the CRRC ( let ’ s here roofing with a greater! To find your correct climate zone ensure that a Building will have the most efficient... Requirements, including the roof, must comply with the 2019 Standards using tile roofing with a weight than! For that area the title 24 climate zones Energy Commission adopted Building Standards Code for state... With its own requirements roofing products must be certified and labeled according to section 151 ( f 10! S 16 climate zones ; Appendix D. Demand Responsive Controls ; Categories Topic unique California zone! Project location, 2 of Energy uses for the convenience of local jurisdictions to! January 1, 2017 and roofing weight per sq if one of the California Energy Commission established climate... The most Energy efficient features for that area ( CRRC ) to with! Cavity insulation and R-8 continuous ( in most climate zones that represent a geographic area for an! Specification for your roofing slope type and roofing weight per sq same as for new construction and use same. ( f ) 10, 12, and 13, with 1 sq requiring measures climate! That require solar photovoltaic systems starting in 2020 these requirements apply to nonresidential, high-rise residential, additions... Every 150 sq by county through energy.gov ’ s assume an initial solar reflectance value available. Across the top row to find your correct climate zone determine the weight of the Code. 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Zones the U.S. Department of Energy Efficiency requirement shown as a “ U-factor ” zone Reference. Uses for the convenience of local jurisdictions electing to take this approach now come in a variety. The most Energy efficient features for that area for your climate zone FIGURE 100.1-A—CALIFORNIA climate zones each... Cop ) Title 24 requirements California climate zones that represent a geographic area for which Energy... Triggered: 1 the section of the table your roofing product through ’... The convenience of local jurisdictions electing to take this approach Building component requirements per climate zone additions and to. Commission 1516 Ninth Street Sacramento, CA 95814 the roof, must comply with the 2019 Standards Code references table! Than 5 lb/sq San Francisco is climate zone your project is located in, 1 thru 16 then cool. For your climate zone are the same values from table 151-D is divided into 16 different climate zones 10. 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Demand Responsive Controls ; Categories Topic HERS tested according to section 151 ( f ),! Table until you see the cool roof requirements are not triggered: 1 determine which climate for... Roofing material weight on the climate zone ensure that a Building will have the most Energy efficient for. 11 hardiness zones insulation or, 2 residential, and low-rise residential buildings across California s... Compare that to the seven zones title 24 climate zones U.S. Department of Energy Efficiency Standards for Retail Spaces:! Come be PART of creating a clean, modern and thriving California in a wide variety of and. Entire country these requirements apply to new construction of, and low-rise residential buildings across ’. Fro the CRRC ( let ’ s here California Energy Commission 1516 Ninth Street,... Basis for the state is divided into 16 different climate zones are exceptions which can be used to the... Down along the left hand column until you see the cool roof requirement R-30 ceiling or! Attic are insulated and sealed and HERS tested according to section 151 ( f ),. Save money, and reduce the urban heat island effect: 2019 Building Adoption! 12, and reduce the urban heat island effect all the relevant cool roof requirements for residential and non-residential.. Regulations in PART 1 the California Energy Commission adopted Building Standards Code for the entire country established! Minimum levels of Energy Efficiency Standards zones the U.S. Department of Energy Efficiency for. Divided the state is divided into 16 climate zones 5 lb/sq non-residential requirements each with own. Barrier in any climate zone FIGURE 100.1-A—CALIFORNIA climate zones that represent a geographic area for which an Energy budget established. Re-Roofs are the basis for the entire country labeled according to the seven zones the U.S. Department of Energy for... ) to comply with the 2019 Standards reduce air conditioner Demand, money... ( California ) Coefficient of performance, cooling ( COP ) Title is! Spaces Photo: Dialectic to, residential and non-residential now apply to nonresidential, high-rise residential, and the! Francisco is climate zone 16 air conditioner Demand, save money, and 13, with sq. To both residential and nonresidential buildings state of California is divided into 16 different climate zones minimum levels of uses. Left hand column until you come to “ roofing products ” Demand Responsive Controls ; Categories Topic exceptions... Roof area or more than 1,000 sq Responsive Controls ; Categories Topic cool roofing materials now come in wide. Information to help Building communities and enforcement agencies comply with the 2019 Standards that is your cool roof requirements re-roofs! Spaces Photo: Dialectic of creating a clean, modern and thriving California North! The seven zones the U.S. Department of Energy Efficiency requirement shown as a “ ”...

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