Roof Insulation Requirements California

California energy commission edmund g.

Roof insulation requirements california.

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. Iecc 2015 requirements by climate zone 3. Continuous insulation zones ashrae 90 1 ashrae 189 1 igcc ibc iecc. Roof and ceiling insulation for prescriptive additions of 700 square feet or less require r 38 minimum in climate zones 1 11 16.

The new cool roof requirements affect new construction significant repairs of existing roofs re roofing plus additions and alterations of existing buildings and homes. The higher the r value the better the thermal performance of the insulation. State applicable energy ashrae zone minimum r value state. Gables to be insulated as exterior walls.

Floor insulation should not cover foundation vents. The table below shows what levels of insulation are cost effective for different climates and locations in the home. R value is a measure of insulation s ability to resist heat traveling through it. 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.

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. Insulation level are specified by r value. Insulation hangers are heavy wires up to 48 inches long with pointed ends which provide positive wood penetration. Netting or mesh should be nailed or stapled to the underside of the joists.

Insulation hangers should be spaced at 18 inch or less prior to rolling out the insulation. Minimum insulation r value requirements non residential above roof deck. California energy commission robert b. Or r 30 minimum in climate zones 2 10.

A radiant barrier is required in climate. 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.