Attic Insulation Requirements Illinois

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.

Attic insulation requirements illinois.

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. R value is a measure of insulation s ability to resist heat traveling through it. Include insulation in the outer walls of the home. Square footage of your attic.

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 average recommended level is 17 inches of r60. The type of insulation you use will be determined by the nature of the spaces in the house that you plan to insulate.

The main factors that impact the cost are. Local jurisdictions would be prohibited from adopting energy codes. Add loose fill insulation to your attic or foil faced batt insulation to your cathedral ceiling. First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.

According to home advisor insulating your attic can cost between 1700 to 2100. 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. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.

Inspecting your attic insulation. Insulation level are specified by r value. 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. Insulation requirements for slab on grade floors are further specified in iecc section r402 2 9.

The table below shows what levels of insulation are cost effective for different climates and locations in the home. Insulation the thicker it is the higher the r value. Contractor or insulation installer s fee. Floor insulation must be installed to maintain contact with the underside of the subfloor decking.

The illinois capital development board cdb must now review and adopt the code though an administrative proceeding. The requirements of the new energy code will apply to all new residential and commercial buildings including alterations additions renovations and repairs. Type and material of your insulation. The higher the r value the better the thermal performance of the insulation.