• 118 Spacegate Drive, Huntsville, AL 35806
  • |Contact Us
Call Your Local Pros Today! (256) 715-4061

Underfloor Insulation Options & Tips

As a homeowner, you may know a little bit about insulation and what it does. You probably even know that your attic and walls should be insulated. But what about the floors? Keep reading to learn more about installing insulation under your flooring!

Should I Insulate Under My Floor?

It’s a good question, one we often hear. Underfloor insulation is an important part of your overall home insulation. Floors above cold spaces—like vented crawl spaces and unheated garages—should be insulated, but don’t forget about under the flooring. This will help ensure maximum energy efficiency for your home.

According to the U.S. Department of Energy, it’s ideal to insulate:

  • Slab floors built directly on the ground
  • Foundation walls of unvented crawl spaces (as an alternative to floor insulation)

An insulated slab is easy to heat, and placing the mass of the slab in your house’s thermal envelope helps keep interior temperatures comfortable. Most slab insulation is done during home construction. While insulating a slab in an existing home can be more expensive and a bit more invasive, it is possible to dig around the perimeter of the house and install insulation, typically foam board. Insulating the exterior edge of a slab can reduce heating bills by 10 to 20 percent in many homes! Foam-in-place insulation can also be blown under floors to help insulate and reduce air leakage.

It’s a good idea to install an air barrier—caulk, foam sealant, etc.—to help prevent cold air in the garage from “short circuiting” the insulation under the subfloor as well.

Underfloor Insulation Services in Huntsville & Decatur, AL

If you’re located in Huntsville, Decatur or a surrounding area in Alabama, call the team at American Insulation. We install floor and underfloor insulation and have experience with new construction and retrofit projects of all kinds. Contact us today to learn more!

Products We Install
Fiberglass Insulation

Our insulation team installs batt and blown-in fiberglass.

Spray Foam Insulation

American Insulation is proud to be a leading installer of spray foam insulation.

Closets & Shelving

American Insulation installs quality shelving and storage solutions.

Shower Enclosures

American Insulation offers a large assortment of shower doors.


From standard sizes to custom cuts, we offer all types of mirrors.

Bathroom Accessories

American Insulation offers bath accessories for every taste.

Door Hardware

We have the right locks, handles, hinges and other hardware for your project.

Are You Sure?
Stay on Page
You are about to leave this American Insulation and enter a third-party site. American Insulation and Installed Building Products have no control over, and accept no liability, obligation, or responsibility for, the contents or performance of other websites. Any such link does not constitute an endorsement or any representation regarding, the linked website, its content, its owner, its performance, its owner’s products or services, or any forward-looking statements found in.
Leave Page
Stay on Page