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.

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. Air gap or air film 3 4 air space insulating properties. The truth is this studs have an r value of 3 5. Insulation r values vary based on the type thickness and density of the insulation material.

The r 0 87 value for the first value in this air r value table subsection. Product documentation download documents. Insulation ratings are measured in r values per inch of thickness. U factor is a measure of a component assembly in its conductive and radiate capacities.

Does not consider internal convection effects. Does not consider presence absence of reflective barriers. As a benchmark one inch of solid wood has an r value of 1. The higher the r value the better the thermal performance of the insulation.

R value is a measure of insulation s ability to resist heat traveling through it. R value actually stands for resistive 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. Insulation level are specified by r value.

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. Typically a higher insulation r rating means better climate control and better energy efficiency for your home. 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. 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.

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. Price list leed calculator r value calculator materials calculator bim model downloads. See the department of energy s doe ranges for recommended levels of insulation below.