Download What's the Best Insulation for Exterior Walls | Gold Star
  • 210 North 10th Street, Sacramento, CA 95811
  • |Contact Us
Call Your Local Pros Today! (916) 229-8445

Options for Exterior Wall Insulation

Although we don’t see too many frigid temperatures here in the Sacramento area, as the summer ends, you may be thinking of ways to save on your energy bills. Sufficient insulation is one of the most basic elements of an energy-efficient home.

Is your house properly insulated? As one of the biggest sources of air leaks, the walls hold a lot of potential. Exterior wall insulation is important when it comes to thermal efficiency and year-round comfort.

What Is the Best Insulation for Exterior Walls?

All exterior walls should be insulated, including foundation walls (above ground and in heated basements) and walls between living spaces and an unconditioned garage or shed roof. According to the U.S. Department of Energy, your best exterior wall insulation options are:

  • Blown-in insulation (can be added to exterior walls without a lot of disturbance to finished areas in the home)
  • Two-part spray foam or wet spray cellulose (for open wall cavities during a remodel)
  • Injectable spray foam (for wall cavities that won’t be open)

While blanket insulation tends to be a more affordable option, it won’t provide as much air sealing and thermal efficiency as spray foam. Insulated concrete blocks and rigid foam are often used for new homes being built.

It’s also recommended to “consider using insulating wall sheathing” for high efficiency. Foam sheathing:

  • Provides a continuous layer of insulation, which helps save energy and improve comfort
  • Helps protects against condensation on the inside wall by keeping it warmer
  • Usually costs less than plywood or oriented strand board (OSB)

Learn more »

Sacramento Area Wall Insulation Installers

If you’re in the Sacramento, California area, Gold Star Insulation can help! We have experience installing insulation in interior and exterior walls, and our professionals use only high-quality materials from leading manufacturers. Get in touch with us to learn more about our insulation services or if you’re ready to start your project—call us at 916-229-8445 or fill out the form on this page!

Where should you insulate in your home? Check out our interactive infographic:

Products We Install
Energy Audits

Our team can help you save money with a home energy audit and air sealing services.


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


Environmentally friendly and effective, cellulose works well in homes and buildings.

Spray Foam

Gold Star Insulation is a leading installer of spray foam insulation in the Sacramento area.

Radiant Barrier

An attic radiant barrier can help keep your home cooler and more comfortable.

Insulation Removal

Gold Star Insulation provides home insulation removal services.

Air Sealing

We are committed to saving you money by sealing your attic—which is the main source of air leaks in the home.

Are You Sure?
You are about to leave Gold Star Insulation and enter a third-party site. Gold Star 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