Attic Insulation Cellulose R Value
You will need a higher r value of insulation if you live in the northeast than if you live in southern california.
Attic insulation cellulose r value. A professional contractor or existing energy codes will provide the right r values for you depending on your home s climates. Click the button to calculate the approximate r value for this job. As a benchmark one inch of solid wood has an r value of 1. By today s standards most homes built more than 10 years ago can be considered under insulated.
This calculator is to be used as an estimating tool only. Enter your data into the fields where indicated. Achieving greater r values in exterior walls. 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.
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. Recycled glass or sand that s melted and spun into fibers. The r value of loose fill cellulose is r 3 2 3 8 per inch. Square feet of house or area to be insulated current and desired r value for insulation and type and cost of your energy.
Input depth of existing blown in insulation in inches. You can achieve better thermal performance in your attic by adding an additional layer of insulation. Cellulose insulation has a baseline r value of 3 8 per inch. When installing cellulose in your home the highest r value or installation depth is not necessarily the best.
There are many ways to retrofit a home with fiberglass and. The higher the r value the better the thermal performance of the insulation. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another. Loose fill cellulose insulation can settle around and conform to most of the obstructions found in walls and attics.
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. The common denominator among varieties of insulation is the r value. Use this insulation savings calculator to measure the financial impact of increasing your insulation performance. How much is enough.