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Installing attic insulation is an excellent way to reduce monthly utility bill. It’s estimated that the amount of time needed to pay off the initial installation cost for attic is between 5 to 6 years with the money saved from the reduced monthly utility bills. There are different types of attic insulation and the type you use relies on the place where you want the insulation to be applied.

Determining the cost of attic insulation is important to give you a rough idea of how much money you need to spend and the return on investment of the money that you have spent on the installation. The following steps are some of the basic you need to know to give you a heads up of how much it’s going to cost you.

1. First of all, find out if there is an existing insulation in your attic. If there is any, you need to figure out the attic insulation type and find out its standards such as the R value. The R value is the single most important item in determining the insulation effectiveness. The higher the R value, the better the insulation works. Find out more on insulation R value here.

2. Next determine additional requirements. “R-38” is the recommended value based on industry standard. If the R-value of the existing attic insulation is less than that, you need to top it up so that they all add up to R-38. For example, if the existing insulation is R-28, you need to add extra insulation with R-10 so that the total R-value is R38.

3. After determining the R-value, calculate the width that needs insulation. The standard width for attic insulation blankets and batts is 16 and 24 inches. Find out the width of insulation that fits perfectly the area between the joists of the attic floor.

4. Once the width is determined, find out which insulation type suits your requirement, blankets or batts. The difference between them is that batts has shorter length which is usually cut into 4 to 8-foot lengths while blankets can come in lengths of 40 feet of longer.

After finding out the insulation type to use, blankets or batts, multiply the length and width calculated from step 3 to give you the total insulation in square foot needed for the attic.

5. Go to a local hardware store or call a professional insulation installer to find out the cost of insulation per square foot. Multiply the cost of the insulation per square foot by the total area that you need.

For example, if the cost of insulation is $1.50 per square foot and the total area in the attic that needs insulation is 1,000 square feet, the total cost will be $1.50 X 1000 = $1500.

6. Get a free quote from insulation contractor. If your attic has cavity walls, additional blow-in attic insulation is required. But blow-in insulation is cheap and requires the least amount of work. Professionals use special equipment to install this type of insulation.

In short, more insulation maybe needed for existing structure compared to new constructions. The attic insulation cost heavily depends on the type of home, the size, the square footage of the attic and types of insulation.

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