Recommended insulation levels for retrofitting existing wood framed buildings.
Colorado attic insulation r value.
R value per inch x number of inches total r value 3 2 x 10 r 32.
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.
You can achieve better thermal performance in your attic by adding an additional layer of 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.
Special insulation exceptions related to ceilings with attic spaces ceilings without attic spaces masonry veneer and thermally isolated sunrooms are set forth in iecc.
R 5 shall be added to the required slab edge r values for heated slabs.
Achieving greater r values in exterior walls.
There are many ways to retrofit a home with fiberglass and.
To obtain a wall or ceiling assembly r value you must add the r values of the individual components together.
Rock wool blown attic 3 10 4 00.
R value is the resistance to heat and cold.
The depth of your insulation will equate to a relative r value.
For example if an attic has 10 inches of fiberglass batt insulation.
Insulation requirements for slab on grade floors is further specified in iecc section 402 2 8.
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Rock wool blown wall 3 10 4 00.
Where you live different climates require different insulation r values.
Add insulation to attic.
You will need a higher r value of insulation if you live in the northeast than if you live in southern california.
Your home s age if your home is more than 10 year old you likely need more insulation.
For example r 49 would equal 17 inches of insulation.
The higher the r value the better the thermal performance of the insulation.
The government recommends a minimum r value of 49 throughout all of colorado.
R 5 shall be added to the required slab edge r values for heated slabs.
Existing 3 4 inches of insulation.
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.
The recommended insulation level for most attics is r 38 or about 12 15 inches depending on the insulation type.
In the coldest climates insulating up to r 49 is recommended.
Insulation requirements for slab on grade floors are further specified in iecc section r402 2 9.
