Blow In Attic Insulation R Value

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

Blow in attic insulation r value.

This is because it achieves nominal r value when it fills in the cavities which include the hard to reach in areas voids and gaps. Insulation level are specified by r value. Blown in insulation makes it easy to earn a higher grade rating when it comes to r values. When blown into attics and wall spaces loose fill fiberglass offers an average r 2 5 thermal value per inch the higher the number the greater the insulating effect.

Input depth of existing blown in insulation in inches. Where you live different climates require different insulation r values. The higher the r value the better the thermal performance of the insulation. Click the button to calculate the approximate r value for this job.

You d need a thickness of. 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. Your home s age if your home is more than 10 year old you likely need more insulation. You can achieve better thermal performance in your attic by adding an additional layer of 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. As a benchmark one inch of solid wood has an r value of 1. R value is a measure of insulation s ability to resist heat traveling through it. However it s hard to see a home that has batt insulation that doesn t fall short.

This calculator is to be used as an estimating tool only. The table below shows what levels of insulation are cost effective for different climates and. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. Achieving greater r values in exterior walls.

Input length width and desired r value of the area to be insulated. For example a wall with 3 fiberglass batting r value of 10 8 11 9 may have an overall r value of nearly 14 because of siding sheathing and drywall. The higher the r value the better the thermal performance of the insulation. So that it can be installed with an insulation blowing machine.

The r value of loose fill cellulose is r 3 2 to 3 8 per inch2. Recommended home insulation r values. 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.

Loose fill fiberglass has an r value of r 2 2 to 2 7 per inch3. Fiber glass insulation typically contains 20 to 30 recycled glass1.