When purchasing insulation one of the biggest considerations is the R-Value. The R-Value plays a large role in setting the price of the insulation because it determines how effective and useful the insulation is. Because price increases as the R-Value improve, many people want to know what R-Value is required. The required R-Value of insulation depends on multiple factors. These factors include the location you live in, where the insulation will be placed, and the age of your home.

What Is an R-Value?

Before diving too deep into the technicalities, let’s review what an R-Value is. An R-Value measures an insulation’s ability to reduce the flow of heat. It expresses the ability of the insulation to block the passage of air or resist heat from entering and exiting through the insulated space. The R-Value effectively measures the insulation’s ability to save on energy and regulate the temperature within your home.

What R-Value Do I Need

As we stated earlier, the necessary R-Value depends on many factors. One important factor is the location where the insulation will be placed. Remember that the greater the R-Value the better the insulation is at restricting heat flow. Exterior walls typically require an R-value between 13 and 23. Attics and ceilings often require an R-Value of 30, 38, or 49.

R-Value Recommendations

Another key consideration when installing attic insulation is where you live. Northern regions in the United States and Ottawa insulation requirements include an R-Value of 49 to 60 based on EnergyStar guidelines. Northern states like Washington, Montana, and Maine require an R-Value closer to R-49. States along the middle of the continental United States require an R-Value around 38 to 60. As you travel south in the United States, the required R-Value decreases.

R-Value and Insulation Amount

Where you install insulation and the location you live in are not the only considerations to take when selecting insulation. You may also want to consider the amount of insulation necessary to achieve the required R-Value. Carefully read packaging and research insulation types to determine the thickness of insulation required to achieve the recommended R-Value for our project.

Consult the Professionals

There are so many factors and considerations to take before purchasing and installing insulation, sometimes it is easier to leave the job in the hands of attic insulation professionals. An insulation professional and expert can help you decide which type and thickness of insulation are needed for your home. They understand the region’s R-value requirements and can ensure that your home is insulated adequately.

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