Attic Insulation Cellulose R Value

Your home s age if your home is more than 10 year old you likely need more insulation.

Attic insulation cellulose r value.

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. By today s standards most homes built more than 10 years ago can be considered under insulated. 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. As a benchmark one inch of solid wood has an r value of 1.

Square feet of house or area to be insulated current and desired r value for insulation and type and cost of your energy. Click the button to calculate the approximate r value for this job. Recycled glass or sand that s melted and spun into fibers. This calculator is to be used as an estimating tool only.

You will need a higher r value of insulation if you live in the northeast than if you live in southern california. 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. A professional contractor or existing energy codes will provide the right r values for you depending on your home s climates.

Lighter in weight than cellulose or mineral wool but it settles more than those materials so you ve got to put in a thicker layer to get the protection you need. There are many ways to retrofit a home with fiberglass and. When installing cellulose in your home the highest r value or installation depth is not necessarily the best. Cellulose insulation has a baseline r value of 3 8 per inch.

Input depth of existing blown in insulation in inches. The higher the r value the better the thermal performance of the insulation. Achieving greater r values in exterior walls. Where you live different climates require different insulation r values.

R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. The r value of loose fill cellulose is r 3 2 3 8 per inch. Average ratings 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. The common denominator among varieties of insulation is the r value.