I am leaning towards insulation of pink fiberglass with a r 38 rating.
How many inches of insulation in the attic equals r45.
Attic existing 3 4 inches of insulation uninsulated floor uninsulated wood frame wall insulated.
Click the button to calculate the approximate r value for this job.
It now has roughly 3 to 4 inches of blown cellouse insulation.
As a benchmark one inch of solid wood has an r value of 1.
I live in raleigh north carolina and would like to insulate my attic.
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.
If you think you re among the 90 of us homes that are under insulated 1 performing a simple insulation inspection will help you determine your insulation needs.
This calculator is to be used as an estimating tool only.
Use this insulation savings calculator to measure the financial impact of increasing your insulation performance.
12 inches thick 13 0 20 to 0 40 0 02 30 0 60 to 1 00 0 03.
My house is approximately 1600 sq feet and was built in 1963.
Enter your data into the fields where indicated.
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.
For loose fill cellulose this translates to a total depth ranging from 8 inches.
Square feet of house or area to be insulated current and desired r value for insulation and type and cost of your energy.
The attic has had no upgrade of insulation since.
Having the correct amount of attic insulation can help you maintain a comfortable temperature throughout your home and help save money on your energy bills plus prevent major issues like ice dams in the winter.
Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system.
Input depth of existing blown in insulation in inches.
These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.
Kraft faced insulation has a vapor retarder that helps to control moisture.
6 inches maximum in esr 1172 sealection 500 but only 3 5 inches maximum for attic walls 5 5 inches maximum in ner 420 icynene but 6 inches in certain attic constructions 2 inches maximum in er 3974 froth pak hogan continued it is worth noting that in the iecc and the energy chapter of the irc the attic insulation.
