Loose fill cellulose is relatively inexpensive yet still has an r value of about 3 5 per inch of thickness compared to fiberglass r value between r3 to r4 per inch.
Cellulose attic insulation r value.
You will need a higher r value of insulation if you live in the northeast than if you live in southern california.
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.
It measures the ability of a material to impede the flow of heat along a continuous solid mass.
R value measures conductive resistance.
The thermal resistance or r value of polystyrene foam board depends on its density.
Input depth of existing blown in insulation in inches.
Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system.
Your home s age if your home is more than 10 year old you likely need more insulation.
They are sprayed stapled blown nailed or simply laid in place.
The common standard by which insulation is measured r value is the level of resistance to heat flow.
So for example a home in kansas is recommended to have a minimum r38 for attic insulation.
The r value for cellulose insulation in an attic depends on several factors including the size shape and construction of your attic typical weather conditions where you live any air leaks and.
Insulation materials come in many forms.
The choices can be difficult to sift but cellulose insulation passes as a strong contender.
You can achieve better thermal performance in your attic by adding an additional layer of insulation.
R value is an essential factor to consider when selecting an insulation material for your premises.
With blown in cellulose insulation that would require insulation to a depth of 10 inches.
Loose fill cellulose insulation can settle around and conform to most of the obstructions found in walls and attics.
There are many ways to retrofit a home with fiberglass and.
This calculator is to be used as an estimating tool only.
Polystyrene loose fill or bead insulation typically has a lower r value compared to the foam board.
As a benchmark one inch of solid wood has an r value of 1.
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.
Over time the r value of xps insulation can drop as some of the low conductivity gas escapes and air replaces it a phenomenon is known as thermal drift or ageing.
Achieving greater r values in exterior walls.
Where you live different climates require different insulation r values.
The term used to define an insulation material s resistance to heat loss.