Blown Insulation In Attic R Value

Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system.

Blown insulation in attic r value.

R value is a measure of insulation s ability to resist heat traveling through it. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and an inch of blown cellulose in an attic has an r value of 3 2 3 7. A bag of cellulose runs about 11 50 and will cover 36 7 square feet at a. When determining how much insulation you need don t guesstimate calculate.

Blowing the insulation should take less than 1 5 hours and the whole job can be completed in less than 4 hours based on a 1 000 sq. Click the button to calculate the approximate r value for this job. As a benchmark one inch of solid wood has an r value of 1. R value measures how well certain building insulation materials can resist heat.

Input length width and desired r value of the area to be insulated. There are many ways to retrofit a home with fiberglass and. Input length width and desired r value of the area to be insulated. This calculator is to be used as an estimating tool only.

The higher the r value the greater the insulation performance. The r value of the insulation for every inch of thickness depends on the type of insulation. Cellulose insulation has an average thermal value of r 3 7 so you d need just over five inches to equal an r 19 batt. This calculator is to be used as an estimating tool only.

Input depth of existing blown in insulation in inches. Where you live different climates require different insulation r values. The two distinct types of attic insulation are loose fill material also commonly known as blown in insulation and batting. Your home s age if your home is more than 10 year old you likely need more insulation.

Recommended home insulation r values. The table below shows what levels of insulation are cost effective for different climates and. Click the button to calculate the depth in inches and pounds of total insulation required for this job. R values of common types of insulation.

Click the button to calculate the depth in inches and pounds of total insulation required for this job. The specially designed atticat machine conditions the insulation by adding millions of tiny air pockets that give the material its insulating power and energy saving r value over time. The higher the r value the better the thermal performance of the insulation. You will need a higher r value of insulation if you live in the northeast than if you live in southern california.

This calculator is to be used as an estimating tool only.