Attic Insulation R Value Inches

Rock wool 2 8 x depth.

Attic insulation r value inches.

The total r value of installed insulation is calculated by multiplying its baseline r value times the depth of the insulation in inches. As you can see there s some variation in r value depending on the particular type and brand of products used. Fiberglass 2 5 x depth. Input length width and desired r value of the area to be insulated.

Dense gray or near white may have black specs. Insulation levels are specified by r value. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. This calculator is to be used as an estimating tool only.

Existing 3 4 inches of insulation. Recommended insulation levels for retrofitting existing wood framed buildings. Know exactly how much you need with our project calculators. Input depth of existing blown in insulation in inches.

Light weight yellow pink or white. Here are the r values per inch of the most common types of insulation. Closed cell spray foam insulation closed cell spray foam has a far better r value per inch than other less effective insulations like cellulose fiberglass or even open cell foam. Add insulation to attic.

The higher the r value the better the thermal performance of the insulation. Batts light weight yellow pink or white. R value of insulation by type. Depth inches total insulation r value.

Small gray flat pieces or fibers from newsprint cellulose 3 7 x depth. All these have r values ranging from r 3 2 to r 3 8 per inch. The r value for cellulose insulation in an attic depends on several factors including the size shape and construction of your attic typical weather conditions where you live any air leaks and. Click the button to calculate the depth in inches and pounds of total insulation required for this job.

Cellulose insulation has a baseline r value of 3 8 per inch. The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. R value is a measure of insulation s ability to resist heat flow. Vermiculite or perlite 2 7 x depth.

R value measures how well certain building insulation materials can resist heat. When determining how much insulation you need don t guesstimate calculate.