The type of insulation you use will be determined by the nature of the spaces in the house that you plan to insulate.
Attic insulation code illinois.
Insulation the thicker it is the higher the r value.
This map shows thermal recommended levels of insulation for various climate zones based on recommendations from the u s.
The table below shows what levels of insulation are cost effective for different climates and locations in the home.
According to home advisor insulating your attic can cost between 1700 to 2100.
Achieving greater r values in attics.
You can mix the type and material of insulation too.
Fortunately this is a fairly easy fix.
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 level are specified by r value.
The iecc is the model building code for the united states.
Make sure your home is properly insulated in all these locations.
Type and material of your insulation.
Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.
You might open up your attic and find bare joists with fiberglass or cellulose insulation between the joists.
Recommended levels of insulation.
Square footage of your attic.
Insulation requirements for slab on grade floors are further specified in iecc section r402 2 9.
Special insulation exceptions related to ceilings with attic spaces ceilings without attic spaces masonry veneer and.
The ideal attic insulation r value is different than the ideal wall insulation r value.
R value is a measure of insulation s ability to resist heat traveling through it.
The main factors that impact the cost are.
The higher the r value the better the thermal performance of the insulation.
Department of energy doe and the international energy conservation code iecc.
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.
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.
Insulation ratings can be improved by adding more layers of insulation.
For example since you cannot conveniently pour insulation into an overhead space blankets spray or board products are used between the joists.
