External Wall Insulation R Value

The r refers to absolute thermal resistance.

External wall insulation r value.

Thickness density and type of materials are some factors that contribute to. The higher the r value the better the thermal performance of the insulation. The net effect on the r value of the wall with the studs transferring heat cold thru conductive properties is the actual rating of that. Let me explain when the general public hears an r 13 wall insulation they believe that in fact they have an r 13 insulation value in their exterior walls.

The r value of some insulations also depends on temperature aging and moisture accumulation. The higher the r value the better the thermal performance of the insulation. In simple terms r values measure the effectiveness of insulation and a higher number represents more effective insulation. You can achieve better thermal performance in your attic by adding an additional layer of insulation.

R value is a measure of insulation s ability to resist heat traveling through it. The table below shows what levels of insulation are cost effective for different climates and. Installing more insulation in your home increases the r value and the resistance to heat flow. 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. Higher r value numbers mean that the insulating material resists the cold or heat from the outside better. Achieving greater r values in exterior walls. As with attics or anywhere else in your home adding more layers of insulation to your exterior walls is key to having a higher r value and better thermal performance.

When calculating the r value of a multilayered installation add the r values of the individual layers. The truth is this studs have an r value of 3 5. Recommended home 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.