Title 24 Roof Insulation Requirements

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.

Title 24 roof insulation requirements.

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. For multifamily r 13 is allowed in zones 10 and 16. 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 roofing building type low rise high rise low slope high slope etc. A cool roof absorbs less heat as it reflects more light from the sun.

Johns manville has several insulation solutions that meet the unvented attic insulation requirements of title 24 including. 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. 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 prescriptive requirements divide roofs into two categories low slope less than 2 12 pitch and steep slope greater than 2 12 pitch. The location of ducts and ahu in conditioned space is still an option. Title 24 defines the requirements for aws in joint appendix 4 section ja4 1 6. Title 24 roof requirements as part of 2010 s standards for both residential and non residential must be equipped with a cool roof.

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.