How Much R Value Do I Need In Attic

R value is a measure of insulation s ability to resist heat flow.

How much r value do i need in attic.

Recommended home insulation r values. 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. Input depth of existing blown in insulation in inches.

What r value do i need. R value is a measure of insulation s ability to resist heat traveling through it. Things needed dust mask. 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.

Click the button to calculate the approximate r value for this job. It is not uncommon to see 15 to 20 of insulation in a well insulated attic. Your next question is most likely how much attic insulation do i need to determine this we need to look at the r value. Insulation level are specified by r value.

The higher the r value the better the thermal performance of the insulation. How much should i add. R value is an efficiency rating for insulation. You ve decided you need to re insulate.

What r value do i need. Insulation levels are specified by r value. How much insulation do i need in my 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.

That s the first step. The insulation in your attic should be at least 12 thick. 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. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.

This calculator is to be used as an estimating tool only. Where you live different climates require different insulation r values. 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. You will need a higher r value of insulation if you live in the northeast than if you live in southern california.

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. It refers to a particular insulation s ability to resist heat flow. What is insulation r value. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.