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Best Type of Attic Insulation

Attics are one of the biggest sources of air leaks in homes and, therefore, it’s essential that they are properly insulated. Do you need to re-insulate your attic? Wondering what the best attic insulation is?

Professionals can help with this—from the assessment of your current space to installation and final cleanup—but it can help to know some information upfront.


What Is the Best Attic Insulation?

You have a few options for attic insulation:

Thermal insulation, like fiberglass and cellulose, can be installed in the flooring, knee walls, etc. Radiant barrier insulation is installed under the roofline, to help your roof reflect, rather than absorb, heat from the sun and keep your home cooler and more comfortable.

The best type of insulation for the attic (and other areas of your home) mainly depends on where you live.

Recommended Attic Insulation in California

Here in Southern California—and any other hot climate—it’s usually recommended to install both a radiant barrier and blown-in fiberglass or cellulose in the attic (in cooler climates, it can be more cost-effective to install more thermal insulation).

Insulating your attic can help:

  • Maximize your home’s energy efficiency and reduce your utility bills
  • Increase your home’s interior comfort levels
  • Improve the efficiency of your air conditioner
  • Contribute to a healthier environment

Attic Insulation Installation from OJ Insulation

The team at OJ Insulation installs radiant barrier, cellulose and fiberglass insulation in homes throughout the San Diego and Los Angeles areas. We have experience insulating all different types and sizes of attics and can help you with your project. No matter your attic insulation needs, we have you covered.

Contact us today to learn more about our services or if you’re ready to get a free estimate!

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

Home Insulation

We insulate attics, walls and crawl spaces.

Commercial Insulation

We insulate warehouses, offices, studio spaces & more.

Insulation Removal

Do you need to remove old insulation? We can help.


We work with builders to install fireplaces.

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