Cellulose Attic Insulation R Value

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Cellulose attic insulation r value.

In general to optimally isolate an attic on average an r value of the insulation is required ranging from r 50 to r 60. 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. You will need a higher r value of insulation if you live in the northeast than if you live in southern california. The r values of both insulations will accumulate.

The common standard by which insulation is measured r value is the level of resistance to heat flow. When walls are already finished injecting loose fill cellulose insulation is one of the few ways of adding. There are many ways to retrofit a home with fiberglass and. Your home s age if your home is more than 10 year old you likely need more insulation.

It measures the ability of a material to impede the flow of heat along a continuous solid mass. R value measures conductive resistance. They are sprayed stapled blown nailed or simply laid in place. For example if your attic already has fiberglass insulation blankets installed you can improve its r value by installing blown in cellulose insulation on top of the blankets.

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. The insulation levels of an attic or of any part of a house are understood through the r value that is the value with which the insulating material is resistant to heat flow. Most of your home s heat is lost through conduction where blown in cellulose insulation r value read more. Click the button to calculate the approximate r value for this job.

Square feet of house or area to be insulated current and desired r value for insulation and type and cost of your energy. The choices can be difficult to sift but cellulose insulation passes as a strong contender. 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.

Loose fill cellulose insulation can settle around and conform to most of the obstructions found in walls and attics. Use this insulation savings calculator to measure the financial impact of increasing your insulation performance. The term used to define an insulation material s resistance to heat loss. Insulation materials come in many forms.

This calculator is to be used as an estimating tool only. 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.