Colorado Attic Insulation R Value

R 5 shall be added to the required slab edge r values for heated slabs.

Colorado attic insulation r value. R 5 shall be added to the required slab edge r values for heated slabs. For example r 49 would equal 17 inches of insulation. R value is the resistance to heat and cold. Your home s age if your home is more than 10 year old you likely need more insulation.

Special insulation exceptions related to ceilings with attic spaces ceilings without attic spaces masonry veneer and. The depth of your insulation will equate to a relative r value. The higher the r value the better the thermal performance of the insulation. The recommended insulation level for most attics is r 38 or about 12 15 inches depending on the insulation type.

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. Insulation requirements for slab on grade floors are further specified in iecc section r402 2 9. Insulation requirements for slab on grade floors is further specified in iecc section 402 2 8. R value per inch x number of inches total r value 3 2 x 10 r 32.

Special insulation exceptions related to ceilings with attic spaces ceilings without attic spaces masonry veneer and thermally isolated sunrooms are set forth in iecc. Rock wool blown wall 3 10 4 00. Existing 3 4 inches of insulation. 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 will need a higher r value of insulation if you live in the northeast than if you live in southern california. Where you live different climates require different insulation r values. Use the r value table below to help you determine the r value of your wall or ceiling assemblies. Recommended insulation levels for retrofitting existing wood framed buildings.

To obtain a wall or ceiling assembly r value you must add the r values of the individual components together. For example if an attic has 10 inches of fiberglass batt insulation. There are many ways to retrofit a home with fiberglass and. In the coldest climates insulating up to r 49 is recommended.

The government recommends a minimum r value of 49 throughout all of colorado. R value table insulation values for selected materials. Achieving greater r values in exterior walls. You can achieve better thermal performance in your attic by adding an additional layer of insulation.

Add insulation to attic.