Attic Insulation R Value Inches

R value of insulation by type.

Attic insulation r value inches.

The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. The higher the r value the greater the insulation performance. When determining how much insulation you need don t guesstimate calculate. Add insulation to attic.

Dense gray or near white may have black specs. The higher the r value the better the thermal performance of the insulation. Existing 3 4 inches of insulation. Batts light weight yellow pink or white.

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. This calculator is to be used as an estimating tool only. This calculator is to be used as an estimating tool only. Click the button to calculate the depth in inches and pounds of total insulation required for this job.

Fiberglass 2 5 x depth. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. All these have r values ranging from r 3 2 to r 3 8 per inch. As you can see there s some variation in r value depending on the particular type and brand of products used.

Light weight yellow pink or white. Input length width and desired r value of the area to be insulated. Input depth of existing blown in insulation in inches. 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.

R value is a measure of insulation s ability to resist heat flow. Vermiculite or perlite 2 7 x depth. Know exactly how much you need with our project calculators. Insulation levels are specified by r value.

Small gray flat pieces or fibers from newsprint cellulose 3 7 x depth. Click the button to calculate the approximate r value for this job. The total r value of installed insulation is calculated by multiplying its baseline r value times the depth of the insulation in inches. Rock wool 2 8 x depth.

Cellulose insulation has a baseline r value of 3 8 per inch. R value measures how well certain building insulation materials can resist heat.