Attic Insulation Requirements Illinois

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.

Attic insulation requirements illinois.

Contractor or insulation installer s fee. Local jurisdictions would be prohibited from adopting energy codes. Inspecting your attic insulation. The table below shows what levels of insulation are cost effective for different climates and locations in the home.

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. Square footage of your attic. R value is a measure of insulation s ability to resist heat traveling through it. Floor insulation must be installed to maintain contact with the underside of the subfloor decking.

Add loose fill insulation to your attic or foil faced batt insulation to your cathedral ceiling. In zone 3 the average minimum requirement for attic insulation is 9 inches of r30 fill. The requirements of the new energy code will apply to all new residential and commercial buildings including alterations additions renovations and repairs. The higher the r value the better the thermal performance of the insulation.

The illinois capital development board cdb must now review and adopt the code though an administrative proceeding. The main factors that impact the cost are. Insulation requirements for slab on grade floors are further specified in iecc section r402 2 9. Insulation level are specified by r value.

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. In zone 4 the average minimum requirement for attic insulation is 11 inches of r38 fill. 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. Include insulation in the outer walls of the home.

Type and material of your insulation. When the old roof only had 1 3 of insulation it means that 5 of insulation might be added to meet the requirement. The type of insulation you use will be determined by the nature of the spaces in the house that you plan to insulate. According to home advisor insulating your attic can cost between 1700 to 2100.

The average recommended level is 17 inches of r60. For added energy control and sound deadening. Insulation the thicker it is the higher the r value. Insulation requirements for crawl space walls are further specified in iecc section r402 2 10.