Roof Insulation Requirements California

Insulation level are specified by r value.

Roof insulation requirements california.

Roof and ceiling insulation for prescriptive additions of 700 square feet or less require r 38 minimum in climate zones 1 11 16. State applicable energy ashrae zone minimum r value state. R value is a measure of insulation s ability to resist heat traveling through it. Gables to be insulated as exterior walls.

The table below shows what levels of insulation are cost effective for different climates and locations in the home. Or r 30 minimum in climate zones 2 10. 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. California energy commission robert b.

The new cool roof requirements affect new construction significant repairs of existing roofs re roofing plus additions and alterations of existing buildings and homes. Insulation hangers are heavy wires up to 48 inches long with pointed ends which provide positive wood penetration. Minimum insulation r value requirements non residential above roof deck. Continuous insulation zones ashrae 90 1 ashrae 189 1 igcc ibc iecc.

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. 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. Iecc 2015 requirements by climate zone 3. Insulation hangers should be spaced at 18 inch or less prior to rolling out the insulation.

Netting or mesh should be nailed or stapled to the underside of the joists. Section 110 8 mandatory requirements for insulation roofing products and radiant barriers 110 section 110 9 mandatory requirements for lighting control devices and systems. Floor insulation should not cover foundation vents. 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.

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. Minimum insulation r value requirements non residential above roof deck. 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.