Should I Insulate My Basement Ceiling and Walls?

So, you have an unfinished basement. Maybe it’s the place where seasonal decorations and exercise equipment go to hide out for most of the year. Or maybe it is an empty space you walk through quickly because it’s bone-chillingly cold in the winter and too humid in the summer. If you’ve been contemplating making your basement more efficient and comfortable, you’re probably wondering if insulating your basement ceiling and walls is worthwhile. The answer in all probability is yes, but let’s explore why that’s the case.

The Hidden Cost of an Unfinished Basement

If your basement is not finished or already insulated, you’re not just wasting what could be extra living space; your home’s overall efficiency is also taking a hit. Uninsulated basements make your HVAC system work overtime, increasing your energy costs.

You may assume the solution is to shut the basement air vents. But if the builder planned ahead, the company sized the heating and cooling system for the home’s total square footage, including the basement, so you could finish it one day without upgrading the HVAC equipment. This means if you close the vents, you’ll throw off the return-supply balance and pressure your furnace or air conditioning system to work harder, resulting in the opposite of what you were hoping for.

The good news is that insulating your basement can make your home more cozy and may even reduce your energy bill. It’s a win-win!

The Ins and Outs of Insulating a Basement

A thorough insulation job involves more than simply putting some insulation on your walls or ceiling and calling it a job well done. Various styles of insulation are available, each with benefits and drawbacks to contemplate. You need to also decide where insulation will be the most beneficial—in the walls or on the ceiling.

Insulating the Basement Walls

Most homes benefit from insulated basement walls. It’s like giving your home a comfortable blanket to wrap around itself during cold weather, leading to significant energy savings. Insulating your walls also helps soundproof the level if you plan to put a home theater or other possibly loud features in the basement.

Note: If your basement is vulnerable to flooding or moisture, tackle these issues first. “Insulated” doesn’t mean “weatherproofed,” and wet insulation doesn’t work.

Insulating the Basement Ceiling

This decision as to whether to insulate your basement ceiling isn’t so simple. Yes, insulating the ceiling makes the first floor of your home feel warmer, but it can also make your basement cooler. If you intend to finish your basement someday, you might not want to take this road. Rather than do that, you could install ductwork and vents, if if you don’t already have those in your basement, to help balance the temperature. On the other hand, if your basement is simply used for storage, by all means insulate that ceiling!

Insulating the Basement Floor

You’ve looked into putting insulation in the basement ceiling and walls, but have you thought about the floor? If you reside in a cooler area or you plan to spend a lot of time in your new basement space, insulating the floor is a good move. An insulated subfloor topped with your choice of carpet, wood or composite flooring will make your winter movie nights or workout sessions much better.

Types of Basement Insulation

You’ve got multiple choices for insulating your basement. The most popular materials include:

    • Spray foam: Ideal for walls and ceilings, spray foam fills each and every nook and cranny and also is an effective air barrier.
    • Foam boards: This flexible option is suited for basement walls, ceilings and floors.
    • Fiberglass batting: This commonly used insulation is great for filling the space between joists.

Basement Insulation R-Values

The R-value of an insulation material reflects its heat flow resistance. The greater the R-value, the better the insulation. While local building codes give you the minimum R-value recommended for your region, buy product with an R-value that’s higher if you can for maximum efficiency. Here are some standard guidelines:

    • An R-value of R-15 to R-19 is recommended for basement walls in most climates.
    • An R-value of R-30 to R-60 is suggested for basement ceilings if you want to insulate between an unfinished basement and the living space above.

More Tips for a Warm and Cozy Basement

Aside from insulating, you can do several other things to keep your home and basement comfortable:

    • Purchase a smart thermostat
    • Seal the windows and doors
    • Use insulating curtains
    • Lay down area rugs
    • Install radiant floor heating
    • Run a dehumidifier

Choose Service Experts Heating, Air Conditioning & Plumbing for Your Insulation Needs

Whether you want to improve your home’s insulation or install other comfort-enhancing accessories, choose Service Experts Heating, Air Conditioning & Plumbing to get the job done right. We offer top quality, expertise and peace of mind, with 24/7 availability and a one-year 100% satisfaction guarantee. If you’re ready to take the next step in home comfort in the U.S., contact Service Experts Heating, Air Conditioning & Plumbing to request the services you need. Call 866-397-3787 today to learn how we can help!

Savings For You

See All Offers Here >


  • Breathe cleaner, healthier air
  • Removes harmful contaminants in your ducts
  • Written 100% Expert Service Guarantee


  • Free Estimates
  • Save Energy and Money
  • Keep Your Home Comfortable

© 2024 Service Experts, Service Experts Heating & Air Conditioning, and the Service Experts logo and design are registered trademarks of Service Experts LLC and used under license by SE Canada Inc. All Rights Reserved. *Not applicable to the Advantage Program. See your signed Advantage Program Agreement for full details and exclusions. 100% Satisfaction Guarantee is subject to certain restrictions and limitations as set forth in the applicable Terms and Conditions.

Chat with a Service Experts Professional