Special insulation exceptions related to ceilings with attic spaces ceilings without attic spaces masonry veneer and thermally isolated sunrooms are set forth in iecc.
Colorado attic insulation r value.
Achieving greater r values in exterior walls.
R value is the resistance to heat and cold.
You can achieve better thermal performance in your attic by adding an additional layer of insulation.
Recommended insulation levels for retrofitting existing wood framed buildings.
Rock wool blown attic 3 10 4 00.
Insulation requirements for slab on grade floors is further specified in iecc section 402 2 8.
R 5 shall be added to the required slab edge r values for heated slabs.
The recommended insulation level for most attics is r 38 or about 12 15 inches depending on the insulation type.
Because of the temperature fluctuations throughout the year colorado homes require a higher insulation r value than cities with more moderate climates like san diego or phoenix.
The higher the r value the better the thermal performance of the insulation.
You will need a higher r value of insulation if you live in the northeast than if you live in southern california.
The depth of your insulation will equate to a relative r value.
R 5 shall be added to the required slab edge r values for heated slabs.
Insulation requirements for slab on grade floors are further specified in iecc section r402 2 9.
Once you identify the type of insulation you have in a certain location and measure the depth of that insulation in inches you can figure out the total r value of that insulation.
In the coldest climates insulating up to r 49 is recommended.
Use the r value table below to help you determine the r value of your wall or ceiling assemblies.
Add insulation to attic.
Existing 3 4 inches of insulation.
For example if an attic has 10 inches of fiberglass batt insulation.
Rock wool blown wall 3 10 4 00.
For example r 49 would equal 17 inches of insulation.
Your home s age if your home is more than 10 year old you likely need more insulation.
The recommended r value throughout homes with electric heat is r 49 in your attic r 22 in your walls r 19 in your basement and r 25 in your floors.
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R value table insulation values for selected materials.
The government recommends a minimum r value of 49 throughout all of colorado.
Where you live different climates require different insulation r values.
To obtain a wall or ceiling assembly r value you must add the r values of the individual components together.
