The table below shows what levels of insulation are cost effective for different climates and locations in the home.
Attic insulation code illinois.
The type of insulation you use will be determined by the nature of the spaces in the house that you plan to insulate.
The higher the r value the better the thermal performance of the insulation.
The main factors that impact the cost are.
Recommended levels of insulation.
Insulation ratings can be improved by adding more layers of insulation.
Insulation requirements for slab on grade floors are further specified in iecc section r402 2 9.
Contractor or insulation installer s fee.
Make sure your home is properly insulated in all these locations.
According to home advisor insulating your attic can cost between 1700 to 2100.
The iecc is the model building code for the united states.
R 5 shall be added to the required slab edge r values for heated slabs.
Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.
Fortunately this is a fairly easy fix.
Department of energy doe and the international energy conservation code iecc.
You can sister the joists by cutting 2 x8 boards the same length as the joists applying construction adhesive and affixing each to a joist with nails.
This map shows thermal recommended levels of insulation for various climate zones based on recommendations from the u s.
You might open up your attic and find bare joists with fiberglass or cellulose insulation between the joists.
For example since you cannot conveniently pour insulation into an overhead space blankets spray or board products are used between the joists.
Insulation the thicker it is the higher the r value.
Type and material of your insulation.
The ideal attic insulation r value is different than the ideal wall insulation r value.
Square footage of your attic.
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.
Achieving greater r values in attics.
You can mix the type and material of insulation too.
No energy cost savings for illinois resulting from the state updating its commercial and residential building energy codes in accordance with federal law are significant estimated to be on the order of nearly 270 million annually by 2030.
R value is a measure of insulation s ability to resist heat traveling through it.
