Roof Insulation Requirements California

Continuous insulation zones ashrae 90 1 ashrae 189 1 igcc ibc iecc.

Roof insulation requirements california.

Mandatory minimum r 22 attic insulation unvented attics must be air sealed at roof deck eaves gables and penetrations. Netting or mesh should be nailed or stapled to the underside of the joists. 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.

Minimum insulation r value requirements non residential above roof deck. Iecc 2015 requirements by climate zone 3. 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.

A radiant barrier is required in climate. California energy commission robert b. 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. Gables to be insulated as exterior walls.

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. State applicable energy ashrae zone minimum r value 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. 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.

Or r 30 minimum in climate zones 2 10. Minimum insulation r value requirements non residential above roof deck. R value is a measure of insulation s ability to resist heat traveling through it. Insulation hangers should be spaced at 18 inch or less prior to rolling out the insulation.

Insulation level are specified by r value. Section 110 8 mandatory requirements for insulation roofing products and radiant barriers 110 section 110 9 mandatory requirements for lighting control devices and systems. 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.