Attic Insulation R Value Inches

Input length width and desired r value of the area to be insulated.

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. R value of insulation by type. All these have r values ranging from r 3 2 to r 3 8 per inch. Vermiculite or perlite 2 7 x depth.

Insulation levels are specified by r value. 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. Cellulose insulation has a baseline r value of 3 8 per inch. Here are the r values per inch of the most common types of insulation.

Know exactly how much you need with our project calculators. Click the button to calculate the approximate r value for this job. R value measures how well certain building insulation materials can resist heat. Add insulation to attic.

The higher the r value the better the thermal performance of the insulation. This calculator is to be used as an estimating tool only. 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. This calculator is to be used as an estimating tool only.

The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. Depth inches total insulation r value. Dense gray or near white may have black specs. Existing 3 4 inches of insulation.

Input depth of existing blown in insulation in inches. Rock wool 2 8 x depth. R value is a measure of insulation s ability to resist heat flow. When determining how much insulation you need don t guesstimate calculate.

Light weight yellow pink or white. The higher the r value the greater the insulation performance. Click the button to calculate the depth in inches and pounds of total insulation required for this job. Batts light weight yellow pink or white.

Small gray flat pieces or fibers from newsprint cellulose 3 7 x depth. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.