R 38 Attic Insulation Depth

Insulation levels are specified by r value.

R 38 attic insulation depth.

An insulation value of r 38 is at the high end and requires a minimum thickness of 12 inches. R values like r 38 are used by the construction industry to describe the thermal resistance of insulation materials like those used to insulate your attic when you are looking at an r 38 insulation you are actually reading a description of its resistance rather than size or thickness of the material. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. To achieve r 38 you can use two layers of r.

Input depth of existing blown in insulation in inches. If you think you re among the 90 of us homes that are under insulated 1 performing a simple insulation inspection will help you determine your insulation needs. The higher the r value the greater the insulating power. For example to install r 38 in an attic with 3200 square feet of area use the following formula.

This calculator is to be used as an estimating tool only. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. C insulation for cathedral ceiling applications. Insulation level are specified by r value.

The higher the r value the better the thermal performance of the insulation. 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. R value is a measure of insulation s ability to resist heat traveling through it. Ask your owens corning representative for the fact sheet on r values.

R value does not depend on a single layer of insulation. Add the right kind of insulation. R value is a measure of insulation s ability to resist heat flow. 8 bags model k91 view the owens corning attic insulation.

Obtain a specific r value. The table below shows what levels of insulation are cost effective for different climates and. R 38c ecotouch insulation width length thickness r value1 cathedral ceiling construction 15 394mm 23 603mm 48 1 219mm 10 260mm 38 0 1. Recommended home insulation r values.

Having the correct amount of attic insulation can help you maintain a comfortable temperature throughout your home and help save money on your energy bills plus prevent major issues like ice dams in the winter. The higher the r value the better the thermal performance of the insulation.