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How many inches of insulation in the attic equals r45.
In temperate coastal areas such as zone 3 attic insulation of at least r30 up to a maximum of r60 is recommended.
Owens corning pink insulation is soft to the touch and easy to install.
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.
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.
Input depth of existing blown in insulation in inches.
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.
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.
I am leaning towards insulation of pink fiberglass with a r 38 rating.
These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.
The attic has had no upgrade of insulation since.
Types of insulation insulation comes in many different forms some of which are listed below.
Square feet of house or area to be insulated current and desired r value for insulation and type and cost of your energy.
Kraft faced insulation has a vapor retarder that helps to control moisture.
This calculator is to be used as an estimating tool only.
For loose fill cellulose this translates to a total depth ranging from 8 inches.
It now has roughly 3 to 4 inches of blown cellouse insulation.
Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system.
Attic existing 3 4 inches of insulation uninsulated floor uninsulated wood frame wall insulated.
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.
Click the button to calculate the approximate r value for this job.
