Roof Insulation Requirements California

California energy commission edmund g.

Roof insulation requirements california.

The higher the r value the better the thermal performance of the insulation. 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. Insulation hangers should be spaced at 18 inch or less prior to rolling out the insulation. 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.

R value is a measure of insulation s ability to resist heat traveling through it. 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. Floor insulation should not cover foundation vents. Netting or mesh should be nailed or stapled to the underside of the joists.

Minimum insulation r value requirements non residential above roof deck. 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. 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. Insulation hangers are heavy wires up to 48 inches long with pointed ends which provide positive wood penetration.

The table below shows what levels of insulation are cost effective for different climates and locations in the home. Section 110 8 mandatory requirements for insulation roofing products and radiant barriers 110 section 110 9 mandatory requirements for lighting control devices and systems. Or r 30 minimum in climate zones 2 10. A radiant barrier is required in climate.

California energy commission robert b. 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. Continuous insulation zones ashrae 90 1 ashrae 189 1 igcc ibc iecc.

Iecc 2015 requirements by climate zone 3. Gables to be insulated as exterior walls. 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 new cool roof requirements affect new construction significant repairs of existing roofs re roofing plus additions and alterations of existing buildings and homes.