California Attic Insulation Requirements

The table below shows what levels of insulation are cost effective for different climates and locations in the home.

California attic insulation requirements.

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. In fact there are building codes that require a certain r value for insulation depending on where in the country you live. 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. Title 24 insulation requirements california title 24 energy reports and calcs for all projects.

Cepe certified energy consultants experienced low rates same day turnaround. 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. The higher the r value the better the thermal performance of the insulation.