Exterior Insulation R Value

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

Exterior insulation r value.

The higher the r value the better the thermal performance of the insulation. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. Insulation level are specified by r value. Air gap or air film 3 4 air space insulating properties.

Also included is the hugely helpful insulation zip code calculator that spells out the suggested amount of r value necessary for the different portions of a structure like foundation interior and exterior walls attic and more. Typically a higher insulation r rating means better climate control and better energy efficiency for your home. The r 0 87 value for the first value in this air r value table subsection. An r value tells you how well a type of insulation can keep heat from leaving or entering your home.

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 a wall with 3 fiberglass batting r value of 10 8 11 9 may have an overall r value of nearly 14 because of siding sheathing and drywall. 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. 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.

The truth is this studs have an r value of 3 5. Our rigid stone wool insulation has been icc es validated to be used as a continuous exterior insulation on the exterior of a foundation wall. Insulation r values vary based on the type thickness and density of the insulation material. 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.

Does not consider presence absence of reflective barriers. Product documentation download documents. Insulation ratings are measured in r values per inch of thickness. Does not consider internal convection effects.

U factor is a measure of a component assembly in its conductive and radiate capacities. See the department of energy s doe ranges for recommended levels of insulation below. R value actually stands for resistive value.