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.

The basics of aws are 24 o c. 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. Below deck insulation is still a prescriptive option. Then determine the weight of the roofing material.

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. 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. 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. New insulation requirements below the roof deck increased from r 13 to r 19 in climate zones 4 8 16. Framing single top plates 2 stud corners reduced header size reduced t wall connections and stacked framing across stories. The location of ducts and ahu in conditioned space is still an option.

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. They are often made with reflective tile or shingles a sheet covering or a highly reflective type of paint.