Blown In Blanket Insulation R Value

It can also be used for retrofitting existing sidewalls.

Blown in blanket insulation r value.

For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3. The jm spider solution does not settle retaining its original r value and energy efficiency. No other product installs better or performs better than optima. 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. Johns manville s spider loose fill insulation is blown in behind the bibs fabric for complete coverage making it easier to install at r 15 and r 23 in 2 4 and 2 6 walls without bulging. The higher the r value the more resistance to heat flow. Once installed bibs offers the highest attainable r values available by cost 4 2 per square inch meaning the buildings in which it s used will offer maximum thermal efficiency which is good for the environment and the occupant s wallet.

Optima fiberglass insulation is blown behind a special optima fabric or equivalent in new construction. This calculator is to be used as an estimating tool only. Input depth of existing blown in insulation in inches. The average cost of blown in insulation to achieve an r value of r 38 r 49 is 1 665 with most homeowners spending between 874 and 2 156 or 1 59 per square foot.

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. Optima gives homes a custom designed seamless thermally efficient sound reducing blanket that completely fills any void. It offers r values from r 11 to r 70. 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.

For example fiberglass insulation rated r 23 provides more insulating power than fiberglass insulation rated r 19. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. 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.

As a benchmark one inch of solid wood has an r value of 1.