California Attic Insulation Requirements

High performance attics prescriptive attic options climate zone hvac duct insulation leakage radiant barrier r 30 at ceiling attic floor r 38 at ceiling attic floor fiberglass below roof deck between rafters air handler ducts in the attic option b 1 r 6 or r 8 depending on cz all with 5 leakage 2 3.

California attic insulation requirements.

The table below shows what levels of insulation are cost effective for different climates and locations in the home. The higher the r value the better the thermal performance of the insulation. Cepe certified energy consultants experienced low rates same day turnaround. Insulation level are specified by r value.

What is california s recommended attic insulation r value as you can imagine the r value for insulating an attic in alaska isn t necessarily going to be the same for insulating an attic in california. In fact there are building codes that require a certain r value for insulation depending on where in the country you live. Yes energy cost savings for california resulting from the state updating its commercial and residential building energy codes in accordance with federal law are significant estimated to be on the order of nearly 680 million annually by 2030.