Attic insulation can last for up to a century, but it's important to keep an eye on its condition and replace it every 15 years to ensure it continues to function properly. The actual lifespan of fiberglass insulation, the most commonly used attic insulation, is 80 to 100 years. However, due to its construction with natural materials, the product will eventually lose effectiveness and need to be replaced 15 to 20 years after its lifespan. Spray foam insulation, duct tape, and household-wrapped insulation can last more than 80 years, while cellulose, loose-filled, foamed cardboard, loose padding, and rockwool insulators can last up to 100 years.
When homeowners buy a property with old insulation, the estimate of the lifespan of the insulation may be overestimated. A professional attic insulation contractor will be able to determine all of these factors for you with a simple insulation inspection. A quick and easy way to tell if your attic needs more insulation is to look at the attic floor. All homeowners are always interested in saving money whenever they can, since energy costs save them the most money and an uninsulated attic is something that many overlook.
In winter, attic insulation keeps the house warm, while in summer it blocks heat and allows the air conditioner to work effectively, keeping the house cool and comfortable. Having the right amount of insulation in your home's attic is the best way to reduce your energy cost. If your home doesn't have attic insulation on the bottom of the roof or on the attic floor, you're probably losing a lot of air conditioning and heating, putting a cost on your energy bills. Even so, all insulation can be weakened by several factors, such as water damage that is not addressed, since fungi can still form and corrode the insulation outside and inside the attic. Depending on the type of insulation you choose for your attic, how long the material will last varies. Because the conditions in an average home are rarely ideal for maintaining flawless insulation, insulation often fails before it reaches its maximum lifespan.
When cellulose, fiberglass, or other insulating materials in attics fall, “empty spaces” are created where mold can grow, become dirty, and become less effective. It's important to remember that even though attic insulation is said to last between 80 and 100 years, it loses effectiveness as it ages. To ensure that your home remains comfortable and energy efficient for as long as possible, it's best to have a professional inspect your attic every 15 years. In addition to regular inspections every 15 years, there are other ways you can extend the life of your attic insulation. Make sure that any water damage is addressed immediately and that any areas where air can escape are sealed off. Additionally, check for any signs of pests or rodents that may have made their way into your attic space.
Finally, make sure that any vents or fans are properly installed and functioning correctly. Attic insulation is an important part of keeping your home comfortable and energy efficient. With proper maintenance and regular inspections every 15 years or so, you can ensure that your attic insulation lasts for its full lifespan.