Typical Wall 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.

Typical wall insulation r value.

The r 0 87 value for the first value in this air r value table subsection. Recommended home insulation r values. The higher the r value the better the thermal performance of the insulation. The table below shows what levels of insulation are cost effective for different climates and.

Insulation level are specified by r value. Does not consider internal convection effects. 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. See the department of energy s doe ranges for recommended levels of insulation below.

Does not consider presence absence of reflective barriers. 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. Air gap or air film 3 4 air space insulating properties. R value is a measure of insulation s ability to resist heat traveling through it.

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. Most rv manufacturers use a dense polyfoam block foam insulation that ranges between r 5 to r 7 in their rv sidewalls.