California Attic Insulation Requirements

An insulation certificate must be posted indicating that the installed insulation is consistent with the plans specifications and manufacturer s recommendations.

California attic insulation requirements.

Insulation level are specified by r value. 2019 california energy code changes. The higher the r value the better the thermal performance of the insulation. Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.

The table below shows what levels of insulation are cost effective for different climates and locations in the home. 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. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. 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.

Email title24 energy ca gov or call toll free in california. Modifications to the indoor air quality requirements of american society of heating refrigerating. Operation and maintenance information for mechanical equipment and devices must be provided to the person responsible for operating and maintaining the building. 916 654 5106 for any 2019 worksheets 2019 sri calculator worksheet.

Having the correct amount of attic insulation can help you maintain a comfortable temperature throughout your home and help save money on your energy bills plus prevent major issues like ice dams in the winter. R value is a measure of insulation s ability to resist heat traveling through it. 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. 800 772 3300 or outside california.

In fact there are building codes that require a certain r value for insulation depending on where in the country you live. Or 0 071 maximum u factor. Walls with 2x6 framing require r 20 minimum insulation for wood framed.