The R-Value of Insulation

An R-value indicates an insulation's resistance to heat flow. The higher the R-value, the greater the insulating effectiveness. The R-value depends on the type of insulation and includes its material, thickness, and density. When calculating the R-value of a multilayered installation, add the R-values of the individual layers. Installing more insulation in your home increases the R-value and the resistance to heat flow.

Insulation Type R-Value per inch Typical Application
Cellulose, loose fill 3.7 Attic Floor
Cellulose, high density 3.2 Walls, Enclosed Cavities
Fiberglass, bats 3.0* Basement Ceiling, Open Studs walls, Attic Floor*
Fiberglass, loose fill 2.8 Attic Floor, Walls (existing)
Rockwood, loose or bats 3.0 Basement Ceiling, Open Studs walls, Attic Floor*
* Properly installed Source: Building Performance Institute INC.

R-Value Recommendations for Existing Homes
Rochester, NY and surrounding areas
Insulation Location R-Value Notes
Attic 49 Attic Floor
Wood framed wall cavity 15 Walls, Enclosed Cavities
Floor 25 Basement Ceiling, Open Studs walls, Attic Floor*

Source: Department of Energy

 

I am writing to express our satisfaction of the installation of our new central air conditioning system, attic vent fan, and replacement of our vent on our furnace. I would like to go into detail because it's important for an owner to know his employees are performing as an owner would want them to. Their performance reflects on the reputation of the business.

-Satisfied Customer
Rochester, NY



Are you ready for your home energy assessment paid for by New York State?

Name:   
Phone:   
Email: