California Attic Insulation Requirements

The higher the r value the better the thermal performance of the insulation.

California attic insulation requirements. 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. Insulation level are specified by r value. Title 24 insulation requirements california title 24 energy reports and calcs for all projects. 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.

While federal and in some cases state guidelines for insulation levels are merely recommendations the local building code is the true authority over insulation requirements. R value is a measure of insulation s ability to resist heat traveling through it. 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.