Attic Insulation Requirements Illinois

Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.

Attic insulation requirements illinois.

Inspecting your attic insulation. For example since you cannot conveniently pour insulation into an overhead space blankets spray or board products are used between the joists. Add loose fill insulation to your attic or foil faced batt insulation to your cathedral ceiling. Include insulation in the outer walls of the home.

Local jurisdictions would be prohibited from adopting energy codes. Floor insulation must be installed to maintain contact with the underside of the subfloor decking. 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.

R value is a measure of insulation s ability to resist heat traveling through it. First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation. The higher the r value the better the thermal performance of the insulation. For added energy control and sound deadening.

Square footage of your attic. Insulation level are specified by r value. 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. In zone 4 the average minimum requirement for attic insulation is 11 inches of r38 fill.

The type of insulation you use will be determined by the nature of the spaces in the house that you plan to insulate. The illinois capital development board cdb must now review and adopt the code though an administrative proceeding. Insulation requirements for crawl space walls are further specified in iecc section r402 2 10. According to home advisor insulating your attic can cost between 1700 to 2100.

The average recommended level is 17 inches of r60. 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. The main factors that impact the cost are.

Insulation requirements for slab on grade floors are further specified in iecc section r402 2 9. Contractor or insulation installer s fee. 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. When the old roof only had 1 3 of insulation it means that 5 of insulation might be added to meet the requirement.