Roof Insulation Requirements California

Mandatory minimum r 22 attic insulation unvented attics must be air sealed at roof deck eaves gables and penetrations.

Roof insulation requirements california.

Floor insulation should not cover foundation vents. The higher the r value the better the thermal performance of the insulation. As of january 1 2010 the california energy commission s updated title 24 building energy efficiency standards for residential and non residential roofing are now in force otherwise know as cool roof. R value is a measure of insulation s ability to resist heat traveling through it.

Gables to be insulated as exterior walls. The new cool roof requirements affect new construction significant repairs of existing roofs re roofing plus additions and alterations of existing buildings and homes. Section 110 8 mandatory requirements for insulation roofing products and radiant barriers 110 section 110 9 mandatory requirements for lighting control devices and systems. Netting or mesh should be nailed or stapled to the underside of the joists.

State applicable energy ashrae zone minimum r value state. The california building code covers many of the same topics as the california roofing requirements including weather protection fire classification roof insulation requirements for roof coverings and suitable materials to use. Roofing requirements for the design materials construction and quality of roof assemblies and structures for commercial buildings are listed in california building code chapter 15. California energy commission edmund g.

Roof and ceiling insulation for prescriptive additions of 700 square feet or less require r 38 minimum in climate zones 1 11 16. Minimum insulation r value requirements non residential above roof deck. Minimum insulation r value requirements non residential above roof deck. Or r 30 minimum in climate zones 2 10.

California energy commission robert b. Browse product options or contact your local insulfoam rep to help you quickly pick the best products to simplify your building envelope needs and fit your project budget all with one supplier. Climate zones 1 5 and 8 16 wall assemblies must not exceed a maximum u factor of 0 051 climate zones 6 7 wall assemblies must not exceed a maximum u factor of 0 065. A radiant barrier is required in climate.

State only ca california 2016 building energy efficiency standards 2 r 25 3 r 25 4 r 30 5 r 30 6 r 30 state. Insulation hangers should be spaced at 18 inch or less prior to rolling out the insulation. Iecc 2015 requirements by climate zone 3. Insulation level are specified by r value.