You know attic insulation is important for home comfort, energy efficiency and indoor air quality. But it isnât enough to install insulation and call it good (or trust that previous owners did); youâll need to make sure you have enough insulation and that itâs in good condition. To determine if your attic needs more insulation, look for these signs:
- Moisture or mold in your attic
- Roof damage (if it wasnât addressed promptly, your insulation could be compromised)
- Rising energy bills, even though your HVAC is working well
- Uncomfortable inside temperatures when the thermostat is set properly
- Drafts in the home, especially those that come from upper floors
- Rodents or bugs (they often enter a home through the attic)
If youâve noticed any of these signs (or you just want to double-check your insulation for your own peace of mind), there are two ways to determine how much insulation is in your attic.
- If your current insulation is in batt form, read the fine print on the outer label and find the insulationâs R-value (a measure of how effectively it resists heat transfer).
- If you have loose-fill, rolled or spray foam insulation, youâll need a tape measure so you can measure the depth of insulation. R-value is measured by the inch, so multiply the depth of the insulation by the R-value of your insulation type. Loose-fill insulationâs R-value ranges from 2.2 to 3.8, depending on the material. Rolled insulation has an R-value between 2.9 and 3.8. Spray foam can range from 3.6 to 8.2, depending on the manufacturer and whether itâs closed-cell or open-cell.
If you know your insulationâs manufacturer, you can check with them to find a more precise R-value. Still not sure? The pros at IBP Nashville can help you determine what type of insulation you have and what R-value itâs giving you.
Do I Have Enough Insulation?
Once youâve figured out what R-value you have, youâll need to determine if thatâs enough. You can refer to this R-value guide to double-check what the proper R-value is for your home. The local climate plays a large part in determining the R-value you need. In Middle Tennessee, itâs recommended to have an R-value between R-38 and R-60 in an attic.
Itâs also important to keep in mind that insulation can become damaged over time, lowering its R-value from what it initially was when it was installed. Moisture is the most frequent culprit, so if you suspect thereâs been a water leak in your attic, consult a pro to see if the insulation is still effective.
If it turns out you donât have enough insulation in your attic, turn to Installed Building Products of Nashville. Having a professional check is always the best way to be sure. Weâll check your installation and provide you with the best suggestion based on what we find. If you need more insulation, weâll gladly install new insulation for you. We sell and install spray foam, fiberglass batt and fiberglass blown-in insulation for attics. Weâll help you decide which form of insulation is best for your home and its needs and come up with a cost-effective plan for you.
To set up a professional service to have your attic insulation checked, contact IBP Nashville today. Reach out online or call us at (615) 244-9420.






