Nj Attic Insulation R Value

In new jersey the u s.

Nj attic insulation r value.

R 5 shall be added to the required slab edge r values for heated slabs. 9 out of 10 homes in the u s. Common attic air leaks this image shows how and where air can easily escape from a home s attic. 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.

Department of energy recommends installing attic insulation that has an r value between r 49 and r 60. The r value is a measurement of thermal resistance or how much the insulation can resist heat flow. Our fiberglass insulation is 100 recycled and is the only insulation product guaranteed to remain at its original r value. 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.

R values for walls represent the sum of cavity insulation plus insulated sheathing if any. 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. 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.

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. Where you live different climates require different insulation r values. You will need a higher r value of insulation if you live in the northeast than if you live in southern california. Achieving greater r values in exterior walls.

Recommended insulation levels for retrofitting existing wood framed buildings. The second r value for mass walls applies when more than half the insulation is on the interior of the mass wall. Existing 3 4 inches of insulation. 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.

You can achieve better thermal performance in your attic by adding an additional layer of insulation. The higher the r value the better the thermal performance of the insulation. The higher the r value the better the insulation will be at keeping a home cool in the summer and warm in the winter. Add insulation to attic.

Your home s age if your home is more than 10 year old you likely need more insulation.