Blown Insulation In Attic R Value

When determining how much insulation you need don t guesstimate calculate.
Blown insulation in attic r value. Input length width and desired r value of the area to be insulated. 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. R values of 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. The table below shows what levels of insulation are cost effective for different climates and. You will need a higher r value of insulation if you live in the northeast than if you live in southern california. 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.
This calculator is to be used as an estimating tool only. There are many ways to retrofit a home with fiberglass and. Recommended home insulation r values. The higher the r value the better the thermal performance of the insulation.
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. Your home s age if your home is more than 10 year old you likely need more insulation. The r value of the insulation for every inch of thickness depends on the type of insulation.
R value measures how well certain building insulation materials can resist heat. The two distinct types of attic insulation are loose fill material also commonly known as blown in insulation and batting. Insulation level are specified by r value. This calculator is to be used as an estimating tool only.
Where you live different climates require different insulation r values. Input depth of existing blown in insulation in inches. Click the button to calculate the depth in inches and pounds of total insulation required for this job. 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.
Input length width and desired r value of the area to be insulated. The recommended r value for attic insulation in ontario is between r 50 and r 60. As a benchmark one inch of solid wood has an r value of 1. This calculator is to be used as an estimating tool only.
Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system.