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How to Insulate Your Home: Where to Install Insulation

If you’re trying to increase your home’s year-round energy efficiency and comfort levels, we recommend installing insulation. In a recent blog post, we talked about when it’s time to re-insulate—this post will discuss where in your home to insulate.

Generally, insulation should be installed in all areas of your home, including:

  • Walls
  • Attic
  • Crawl space

Check out our interactive infographic for a visual answer to “where should I install insulation in my home?”

where to insulate a house

Where to Insulate

Although talking to insulation professionals is the best course of action, it can be helpful to have some basic information.

Wall Insulation

Both interior and exterior walls should be insulated. Also, behind your walls, there are wires, pipes and ductwork and it may be recommended to insulate around them. In general, the best types of wall insulation are blown-in fiberglass, loose-fill cellulose and spray foam.

Attic Insulation

As a significant source of energy loss, the attic is a good place to insulate. Although every attic can vary slightly, knee walls, floors and ceilings are generally insulated. In warm climates, like here in the Sacramento area, professionals sometimes install two types of attic insulation—radiant barrier (installed under the roofline to reflect heat from the sun and keep your home cooler and more energy-efficient) and thermal insulation (usually fiberglass or cellulose).

Crawl Space Insulation

Does your home have a crawl space? It should be insulated. Crawl space insulation can help reduce air leaks, control moisture problems and prevent issues like frozen pipes, soil vapor intrusion, etc. Floor joists, walls and subflooring should be insulated, depending on whether the crawl space is ventilated or unventilated—and we can help you determine which one you have. In general, the best types of crawl space insulation are foam and fiberglass.

Insulation Installers Serving Sacramento, CA

If you need an insulation company in the Sacramento, California area, Gold Star Insulation can help. We have experience installing different types of insulation (including eco-friendly denim) in different homes and have helped countless families save money and live more comfortably.

Contact us today to learn more about our services or to schedule an initial consultation with one of our professionals!

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.

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