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.
California attic insulation requirements.
R value is a measure of insulation s ability to resist heat traveling through it.
The table below shows what levels of insulation are cost effective for different climates and locations in the home.
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.
In fact there are building codes that require a certain r value for insulation depending on where in the country you live.
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.
Insulation level are specified by r value.