There is no time like the present to replace your attic insulation in Columbia. Replacing your old insulation is an investment that can save you thousands of dollars each year in heating and cooling costs. The sooner you replace your old and worn insulation, the sooner you will start saving money on your heating and cooling bills in Maryland.
Contact Park Heights Roofing at (410) 358-1257 today to learn more about our attic insulation replacement services.
The Lifespan of Insulation
Blown cellulose insulation has an average effective lifespan of between 20 to 30 years. However, it doesn’t provide the same amount of thermal protection that fiberglass insulation offers which means you need more to achieve the desired level of protection.
Blown or fiberglass insulation batts can last anywhere from 15 to 50 years depending on the insulation. Spray foam insulation can provide protection for up to 80 years. Of course, many variables affect overall lifetime effectiveness. For example, whether the insulation is compacted, whether insects/rodents infiltrate it, and whether moisture penetrates the attic space and causes the growth of mold, mildew, etc. When this happens, the effectiveness and lifespan of the insulation are significantly reduced.
The Importance of Understanding “R-Value”
Insulating materials are rated based on their ability to resist conducting heat flow. The thermal resistance of insulation is referred to as its R-value. Maryland is in Zone 4 which means that homes with an uninsulated attic should install insulation with an R-value of between R38 and R60. In homes with an existing 3-4 inches of insulation, R38 should be sufficient.
Installing New Insulation Over the Old
Yes, you can typically install new insulation over old insulation but not always. Faced insulation, such as rolled batts, can be placed atop old insulation if it doesn’t have a vapor retarder. If the attic contains blown insulation, then new insulation can be blown in atop of it without any problem.
However, if the existing insulation is wet or contains mold or mildew, then adding new insulation over the old isn’t possible. That is because mold and mildew will continue to grow. This can lead to roof rot, insect infestation, and respiratory health problems as the mold spores begin to circulate throughout the home. Similarly, if the insulation contains asbestos, this needs to be removed immediately as it poses a significant threat to the health of everyone in the house.
The Value of Air Sealing
Adding installation is just one step of the insulating process. Every home should be tested for air leaks, and these leaks should be plugged at the same time that the insulation is added. Air leaks are a major source of heat loss throughout the year and should always be investigated anytime you notice an otherwise unexplained increase in your heating and cooling bills.
Tax Benefits and Rebates
The State of Maryland is eager to reduce electricity and gas usage throughout the state. To that end, the Maryland Energy Department is offering some highly attractive rebates to homeowners who upgrade their homes to be more energy efficient. Insulation improvements are among the projects listed as eligible for rebates. There are also programs available for financing, tax credits, etc. that are worth looking into as these can significantly offset the cost of installation.
We invite you to contact Park Heights Roofing at (410) 358-1257 for more information about attic insulation replacement. We have the answers to your questions and will be happy to tell you more about the ways we can help keep you cool in the summer and snug as a bug throughout the winter.