Brief Background – Title 24, Part 6 (California Building Energy Efficiency Standards)

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Cool Roof RequirementsCalifornia’s Title 24 Energy Efficiency Standards for Nonresidential Buildings (2005) Roofing Contractor TrainingCool Roof Training CollaborativeCalifornia Energy Commission, California Roofing Contractors, California Building Officials (CALBO), Pacific Gas & Electric Co., Southern California Edison, and Sempra Utilities
,Brief Background – Title 24, Part 6 (California Building Energy Efficiency Standards) California energy standards began 1978
Updated every 3 years Standards address: Building Envelope: Insulation, windows, roofing
Lighting: Electric lighting allowances HVAC: Equipment standards, duct leakage, etc. First cool roofing regulations took effect on October 1, 2005; amended for roof coatings September 11, 2006 ,How Cool is a Cool Roof?(Part 1) Sacramento, Noonish, July 12, 2000, 89ºF BUR topped with capsheet 158 °F BUR topped with aggregate 159°F EPDM single-ply Surface 173°F Courtesy Dan Varvais
,How Cool is a Cool Roof?(Part 2) Sacramento, Noonish, July 12, 2000, 89ºF Cool coating over BUR 108°F Cool single-ply 121°F Courtesy Dan Varvais
,Why Does Roof Surface Temperature Matter? Hotter roof drives heat into the building, increasing need for air conditioning
Air conditioning is electricity-intensive Demand for electricity – – stresses the statewide electric power grid (possible power outages)
costs building owners money ,How Does Title 24 Energy Code Work? Sets an energy budget for NEW buildings AND additions & alterations (includes re-roofing) Budget is in units of energy NOT $$: kBtu per square foot per year
Budget varies by climate zone(16 climate zones in California) ,California’s 16 Climate Zones Details and list of cities at www.energy.ca.gov/maps/ climate_zone_map.html Climate Zone 1, coastal, foggy, cool Climate Zone 16 – mountains, snows in winter, less than 80°F in summer Many inland climate zones – mild winters, hot dry summers (population increasing, air conditioning needs increasing) Cool Roof Regulations Apply to ALL Climate Zones
,How Does Title 24 Energy Code Work?Meeting the Energy Budget Design the building or addition/alteration with appropriate energy efficiency features
Submit documentation to building department with permit application Construct the building/addition/alteration with those features Building Inspectors are the enforcers for Title 24 energy measures (not a perfect system, yet) ,How Does Title 24 Energy Code Work? (cont’d) For NEW construction, builders must show energy compliance by either – – Following Title 24 prescriptive requirements for building envelope, lighting & HVAC (our list of minimum requirements)
or Running computer simulation showing that building performance exceeds that of an identical building with the prescriptive measures – more flexible ,How Does Title 24 Energy Code Work? (cont’d) For reroofing, contractors must show energy compliance by either – – Following Title 24 prescriptive requirements for cool roofs
or Installing noncool roof plus roof insulation ,California building standards are regulations required by law – permit or not. Construction Team Roles Team Member Role If providing a product to meet Title 24 standards, test with supervisory entity (CRRC) and affix CRRC label Comply with Title 24 standards. If permit is required, furnish documentation to Building Department
,What Are the Cool Roof Regulations?(part 1) Cool roofs are NOT mandatory
They are a part of the list or “prescription” of minimum levels of energy efficiency
These prescriptive energy measures help set the building’s energy budget ,What Are the Cool Roof Regulations?(part 2) Cool roofs are NOT mandatory
Which means…. If you don’t put on a cool roof, you must find energy savings elsewhere to meet the energy budget
When reroofing, this means
install a fully compliant cool roof OR
install a non-cool roof

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