Attic Insulation R Value Inches

Click the button to calculate the depth in inches and pounds of total insulation required for this job.

Attic insulation r value inches.

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

The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. Insulation levels are specified by r value. The total r value of installed insulation is calculated by multiplying its baseline r value times the depth of the insulation in inches. Input depth of existing blown in insulation in inches.

Cellulose insulation has a baseline r value of 3 8 per inch. Know exactly how much you need with our project calculators. As you can see there s some variation in r value depending on the particular type and brand of products used. 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.

Recommended insulation levels for retrofitting existing wood framed buildings. R value measures how well certain building insulation materials can resist heat. Batts light weight yellow pink or white. Here are the r values per inch of the most common types of insulation.

Existing 3 4 inches of insulation. Rock wool 2 8 x depth. 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. Click the button to calculate the approximate r value for this job.

Fiberglass 2 5 x depth. Light weight yellow pink or white. R value is a measure of insulation s ability to resist heat flow. Dense gray or near white may have black specs.

Depth inches total insulation r value. Input length width and desired r value of the area to be insulated. Small gray flat pieces or fibers from newsprint cellulose 3 7 x depth. Vermiculite or perlite 2 7 x depth.

All these have r values ranging from r 3 2 to r 3 8 per inch. Add insulation to attic.