The higher the r value the better the thermal performance of the insulation.
Nj attic insulation r value.
There are many ways to retrofit a home with fiberglass and.
Existing 3 4 inches of insulation.
Special insulation exceptions related to ceilings with attic spaces ceilings without attic spaces masonry veneer and thermally isolated sunrooms are set forth in iecc.
Insulation requirements for slab on grade floors is further specified in iecc section 402 2 8.
Recommended insulation levels for retrofitting existing wood framed buildings.
The insulation for basement walls must be from the top of the wall down 10 feet below grade or to the basement floor whichever is less.
Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces.
In addition to the radiant barrier we offer a formaldehyde free johns manville blown in insulation to bring your attic insulation up to r 38 approximately 15 inches which is code for the state of new jersey.
Our fiberglass insulation is 100 recycled and is the only insulation product guaranteed to remain at its original r value.
Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value.
Achieving greater r values in exterior walls.
Department of energy recommends installing attic insulation that has an r value between r 49 and r 60.
In new jersey the u s.
9 out of 10 homes in the u s.
The higher the r value the better the insulation will be at keeping a home cool in the summer and warm in the winter.
Common attic air leaks this image shows how and where air can easily escape from a home s attic.
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.
If at any point as long as you own your home your insulation fails to maintain it s original r value our insulation team will refill your attic to the.
The first value is cavity insulation the second value is continuous insulation so 13 5 means r 13 cavity insulation plus r 5 continuous insulation.
R 5 shall be added to the required slab edge r values for heated slabs.
Following are illustrations identifying common problems and what proper attic sealing and insulation should look like.
You can achieve better thermal performance in your attic by adding an additional layer of insulation.
The second r value for mass walls applies when more than half the insulation is on the interior of the mass wall.
The r value is a measurement of thermal resistance or how much the insulation can resist heat flow.
