Best R Value For Attic

Mineral wool insulation has a value of 3 1 inch thickness.
Best r value for attic. The higher the r value the better the thermal performance of the insulation. The higher the r value the greater the performance of the insulation. Therefore it needs to be. There are many ways to retrofit a home with fiberglass and.
It is manufactured from recycled paper. Your home s age if your home is more than 10 year old you likely need more insulation. 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. An insulation r value chart or table can assist you with the calculation to ensure your attic or wall r values are adequate for your.
Recommended insulation levels for retrofitting existing wood framed buildings. 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. Add insulation to attic.
See the department of energy s doe ranges for recommended levels of insulation below. Just how much you need for your residential or commercial building depends on a number of factors such as your heating system and location. Existing 3 4 inches of insulation. 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.