Cellulose Attic Insulation R Value

They are sprayed stapled blown nailed or simply laid in place.

Cellulose attic insulation r value.

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. With blown in cellulose insulation that would require insulation to a depth of 10 inches. Click the button to calculate the approximate r value for this job. R value is an essential factor to consider when selecting an insulation material for your premises.

As a benchmark one inch of solid wood has an r value of 1. The term used to define an insulation material s resistance to heat loss. Once the current r value is estimated check the recommended r value based on the region of the country. There are many ways to retrofit a home with fiberglass and.

The choices can be difficult to sift but cellulose insulation passes as a strong contender. 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. Polystyrene loose fill or bead insulation typically has a lower r value compared to the foam board. 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.

This calculator is to be used as an estimating tool only. When walls are already finished injecting loose fill cellulose insulation is one of the few ways of adding. Achieving greater r values in exterior walls. Most of your home s heat is lost through conduction where blown in cellulose insulation r value read more.

Loose fill cellulose insulation can settle around and conform to most of the obstructions found in walls and attics. The higher the r value the better the thermal performance of the insulation. The common standard by which insulation is measured r value is the level of resistance to heat flow. You will need a higher r value of insulation if you live in the northeast than if you live in southern california.

Where you live different climates require different insulation r values. Input depth of existing blown in insulation in inches. It measures the ability of a material to impede the flow of heat along a continuous solid mass. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system.

The thermal resistance or r value of polystyrene foam board depends on its density. Insulation materials come in many forms. So for example a home in kansas is recommended to have a minimum r38 for attic insulation. Your home s age if your home is more than 10 year old you likely need more insulation.