Attic Insulation R Value Chart

The table below shows what levels of insulation are cost effective for different climates and.

Attic insulation r value chart.

The r value depends on the type of insulation density and thickness. Installing more insulation in your home increases the r value and the resistance to heat flow. 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. How do you figure out r value.

Colder climates will typically require a higher r value for even greater thermal. Install insulation with the proper r value. For some types of insulation the r value also depends on aging temperature and moisture. How much insulation should you install.

You will need a higher r value of insulation if you live in the northeast than if you live in southern. As a benchmark one inch of solid wood has an r value of 1. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. 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.

Recommended home insulation r values. R value is a measure of insulation s ability to resist heat traveling through it. How well insulation resists heat flow depends on how and where you install the insulation. Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.

Chart courtesy of energy star. 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 your attic to reach r 30 if you live in zones 2 or 3. R value requirements are different based on your location. A high r value then means higher effectiveness.

Note from this chart that the ideal r value differs for each part of your home. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. The higher the r value the better the thermal performance of the insulation. R value refers to the insulation s ability to resist heat flow.

The r value of some insulations also depends on temperature aging and moisture accumulation. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and an inch of blown cellulose in an attic has an r value of 3 2 3 7. Where you live different climates require different insulation r values. The amount of insulation recommended for your home will vary depending on a number of factors.