Title 24 Roof Insulation Requirements

U factor for a wall includes the effects of framing sheathing cavity insulation continuous insulation and interior exterior finishes.

Title 24 roof insulation requirements.

New insulation requirements below the roof deck increased from r 13 to r 19 in climate zones 4 8 16. Title 24 roofing product. The following cool roof rating council crrc website can be used to. The roofing requirements can be found in the following sections of the 2019 title 24 part 6 standards.

New requirements in the 2019 california title 24 building energy efficiency standards for retail spaces. 2 4 16 oc framing r15 cavity insulation and r 8 continuous in most climate zones. Below deck insulation is still a prescriptive option. Title 24 insulation requirements california title 24 energy reports and calcs for all projects.

For multifamily r 13 is allowed in zones 10 and 16. Title 24 part 6 and associated administrative regulations in part 1. 2 6 16 oc framing r21 cavity insulation and r 5 continuous in most climate zones. Any attic insulation not listed under prescriptive must use performance options e g unvented attics or attics with foam board above the roof deck.

The new cool roof requirements affect new construction significant repairs of existing roofs re roofing plus additions and alterations of existing buildings and homes. 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. Builders can still use above deck insulation with performance. Do all roofs have cool roof requirements in title 24.

June 2015 cec 400 2015 037 cmf california energy commission. While title 24 applies to all residential and non residential buildings in the state the specific requirements for roofs are dependent on geographic location building use residential non residential type of construction new construction additio n or re. The location of ducts and ahu in conditioned space is still an option. Piping insulation requirements the pipe insulation thickness table has added r values in addition.

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