Title 24 Roof Insulation Requirements

California s building energy efficiency standards for residential and nonresidential buildings title 24 part 6 contains requirements for the thermal emittance three year aged reflectance and solar reflectance index sri of roofing materials used in new construction and re roofing projects.

Title 24 roof insulation requirements.

Framing single top plates 2 stud corners reduced header size reduced t wall connections and stacked framing across stories. R 30 johns manville formaldehyde free fiberglass batts air seal the roof deck eaves and gables before installation r 22 johns manville corbond spray foam spf insulates and air seals in one step. Building energy efficiency standards title 24 2019 building energy efficiency standards 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. Builders can still use above deck insulation with performance.

New insulation requirements below the roof deck increased from r 13 to r 19 in climate zones 4 8 16. The title 24 mandatory measures do not require unheated slab insulation but when the prescriptive requirements call for it zone 16 the mandatory measures require that the insulation material must be suitable for the application and meet the requirements. The location of ducts and ahu in conditioned space is still an option. A cool roof absorbs less heat as it reflects more light from the sun.

Then determine the weight of the roofing material. They are often made with reflective tile or shingles a sheet covering or a highly reflective type of paint. Below deck insulation is still a prescriptive option. For multifamily r 13 is allowed in zones 10 and 16.

Title 24 roof requirements as part of 2010 s standards for both residential and non residential must be equipped with a cool roof. Johns manville has several insulation solutions that meet the unvented attic insulation requirements of title 24 including. The basics of aws are 24 o c.