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What Is the Best Type of Insulation for a House?

Do you need to insulate your home? If you’ve been doing some research, you may know that there are several types of insulation—so which one is best?

In reality, there is no “best” insulation material. An insulation professional will be able to help you determine the right one for your project—depending on several factors. One major factor is the area you need to insulate.

What area of your home needs more insulation installed? This can help you narrow down your options for selecting a type of insulation.

Best Type of Insulation for an Attic

For cooler climates—such as here in the Chicago area—a combination of a radiant barrier and thermal insulation can be the most effective solution. Radiant barrier insulation is installed right under the roof to help reflect sunlight and keep your home more comfortable. But attic floors, knee walls, etc. also need to be insulated—fiberglass and cellulose are typically used.

Best Type of Insulation for Walls

If outside noises are louder than usual or if your home is drafty, you may need more wall insulation. Due to its ability to be easily sprayed into the small cracks, gaps and crevices behind your walls, spray foam insulation is ideal. Blown-in fiberglass is also a good type of insulation for existing walls (rather than open wall cavities for new construction projects).

Best Type of Insulation for a Basement

The lower levels of your home hold a lot of potential for energy savings. Blown-in fiberglass, fiberglass batts, loose-fill cellulose and spray foam insulation can all be installed in the basement.

Best Type of Insulation for a Crawl Space

The type of insulation will depend on whether your crawl space is ventilated or not, but typically fiberglass, spray foam or rigid foam insulation are used for this area of a home.

Chicago Area Insulation Installers

If you live in Chicagoland and need to install more insulation in your home, ThermaSeal / Lakeside Insulation can help. We have experience insulating all areas of a home with different insulation materials.

Contact us to learn more about our services or if you’re ready to schedule a consultation with our professionals!

Products We Install

Our team installs both batt and blown-in fiberglass insulation.


Help prevent mold and excessive moisture infiltration in homes you build with our waterproofing services.

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