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Fiberglass Insulation for Your Attic

Do you need to install insulation in your attic? As one of the most significant sources of energy loss in homes, the attic is the place to start when it comes to insulating your home. There are two types of insulation to install in the attic: thermal (fiberglass) and foil (radiant barrier).

If we get a cold winter this year here in Southern California, you’ll need to consider thermal insulation rather than radiant barrier, which is installed in attic ceilings and helps roofing reflect heat from the sun to keep interior home temperatures cooler. A material like fiberglass insulation works a little differently—installed in the attic floor, knee walls, etc., it helps prevent heat escape from homes.

What kind of attic insulation should you install in your San Diego or Los Angeles area home?

Attic Insulation: Batts vs. Loose-Fill

You have two options when it comes to fiberglass insulation—batts or loose-fill (blown-in). Which one is best for your attic? Our team can help you determine that, but in general, here are a few things to keep in mind:

Batts (Blanket Insulation)


Batt insulation works well in attics with:

  • Standard joist spacing, particularly if there is no insulation
  • Few obstructions
  • A lot of head room



Blown-in (or loose-fill) fiberglass insulation works well in attics with:

  • Irregular joist spacing
  • Many obstructions (like piping, ductwork, etc.)
  • Insulation that needs to be topped off (it easily fills small gaps)
  • Limited headroom

Loose-fill cellulose can also be installed in your attic—it is similar to and offers the same benefits as blown-in fiberglass.

Attic Insulation Installation in San Diego & Los Angeles

Whether you install batt or blown-in insulation, it will help:

  • Reduce your energy bills
  • Make your home more comfortable
  • Improve the performance of your HVAC equipment

Contact the experts at OJ Insulation if you’re ready to insulate your attic and start increasing the energy efficiency of your home—we are just a call (800-707-9278) or click away! If you’re a builder looking for a new attic insulation installer, we serve Southern California, and the Bay Area.

You may also be interested in reading:

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.

Fireplaces & Mantels

We work with builders to install fireplaces and mantels.

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