How Much R Value Do I Need In Attic

If your attic insulation is only a few inches thick or if you can see the ceiling joists you re wasting money on your heating and cooling bills.

How much r value do i need in attic.

That s the first step. For example if your home has cellulose insulation at a depth of 8 inches between the joists the attic insulation has an r value of 3 7 times 8 or 29 6. What r value do i need. The thicker the better.

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. Insulation level are specified by r value. The insulation in your attic should be at least 12 thick. Things needed dust mask.

How much insulation do i need in my attic. These r values are a sum meaning this should be the total r value once you add up the entire depth 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. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3.

Your home s age if your home is more than 10 year old you likely need more insulation. There are many ways to retrofit a home with fiberglass and. R value is an efficiency rating for insulation. The higher the r value the better the thermal performance of the insulation.

Where you live different climates require different insulation r values. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. You will need a higher r value of insulation if you live in the northeast than if you live in southern california. The higher the r value the better the thermal performance of the insulation.

R value is a measure of insulation s ability to resist heat traveling through it. It refers to a particular insulation s ability to resist heat flow. Your next question is most likely how much attic insulation do i need to determine this we need to look at the r value. Click the button to calculate the approximate r value for this job.

R value is a measure of insulation s ability to resist heat flow. How much should i add. Insulation levels are specified by r value. It is not uncommon to see 15 to 20 of insulation in a well insulated attic.

What r value do i need. 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. What is insulation r value. Input depth of existing blown in insulation in inches.