Attic Insulation Requirements Illinois

Inspecting your attic insulation.

Attic insulation requirements illinois. Floor insulation must be installed to maintain contact with the underside of the subfloor decking. Your attic should have a certain amount of insulation in it and the recommended level of insulation for your attic is dependent on where you live. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. Include insulation in the outer walls of the home.

First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation. Type and material of your 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. 5 illinois energy conservation code 2018 amendment proposals it takes from 6 8 of insulation to meet the minimum r 30 continuous insulation required by the 2018 iecc.

The illinois capital development board cdb must now review and adopt the code though an administrative proceeding. The type of insulation you use will be determined by the nature of the spaces in the house that you plan to insulate. Access doors from conditioned spaces to unconditioned spaces e g attics and crawl spaces shall be weatherstripped and insulated to a level equivalent to the insulation on the surrounding surfaces. For example since you cannot conveniently pour insulation into an overhead space blankets spray or board products are used between the joists.

The requirements of the new energy code will apply to all new residential and commercial buildings including alterations additions renovations and repairs. Contractor or insulation installer s fee. Insulation level are specified by r value. The average recommended level is 17 inches of r60.

Insulation requirements for crawl space walls are further specified in iecc section r402 2 10. R value is a measure of insulation s ability to resist heat traveling through it. Add loose fill insulation to your attic or foil faced batt insulation to your cathedral ceiling. Square footage of your attic.

Insulation the thicker it is the higher the r value. In zone 3 the average minimum requirement for attic insulation is 9 inches of r30 fill. In zone 4 the average minimum requirement for attic insulation is 11 inches of r38 fill. The main factors that impact the cost are.

According to home advisor insulating your attic can cost between 1700 to 2100. The table below shows what levels of insulation are cost effective for different climates and locations in the home. Local jurisdictions would be prohibited from adopting energy codes. Insulation requirements for slab on grade floors are further specified in iecc section r402 2 9.