R 38 Attic Insulation Depth

Ask your owens corning representative for the fact sheet on r values.

R 38 attic insulation depth.

Owens corning r 38 ecotouch pink cathedral ceiling kraft faced fiberglass insulation batt 23 3 4 in. The higher the r value the better the thermal performance of the insulation. C insulation for cathedral ceiling applications. Insulation levels are specified by r value.

For example to install r 38 in an attic with 3200 square feet of area use the following formula. R 38c ecotouch insulation width length thickness r value1 cathedral ceiling construction 15 394mm 23 603mm 48 1 219mm 10 260mm 38 0 1. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. R value does not depend on a single layer of 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. This calculator is to be used as an estimating tool only. Input depth of existing blown in insulation in inches. The higher the r value the better the thermal performance of the insulation.

Insulation level are specified by r value. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. Obtain a specific r value. Recommended home insulation r values.

To achieve r 38 you can use two layers of r. 3200 ft2 1000 3 2 19 2 bags per 1000 ft2 for r 38 x 3 2 61 4 bags building inspectors typically check the insulation depth to verify compliance with local codes. The higher the r value the greater the insulating power. An insulation value of r 38 is at the high end and requires a minimum thickness of 12 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 table below shows what levels of insulation are cost effective for different climates and. Add the right kind of insulation. R value is a measure of insulation s ability to resist heat traveling through it.

Click the button to calculate the approximate r value for this job. 8 bags model k91 view the owens corning attic insulation.