Home Attic InsulationSpray Foam Insulation is significantly more expensive if it is compared with the fiberglass insulation. However, spray foam insulation is more effective, especially for the extreme cold conditions. The fiberglass insulation is used more in American homes. The fiberglass insulation is actually a very common kind of insulation. On the other hand, spray foam insulation has comparatively less market but is gaining popularity. The basic difference is only that the fiberglass insulation can be installed easily, by homeowners in most of the cases and the spray foam requires professional installation.

How they work

Spray Foam: They are of two types; open cell and closed cell. The open cell is basically used as one air barrier and the closed cell is used as a moisture, vapor, and air barrier.

Fiberglass: They have tiny or little glass fibers that trap the air inside and transfer the heat slowly.

Air Leakage

Spray Foam: The open cell sometimes has very little air leakage but with the closed cell there will be absolutely no air leakage.

Fiberglass: The fiberglass insulation has air leakage.


Spray Foam: The installation requires professionals to spray it.

Fiberglass: There are sheets that need to be placed on the wall in order to install.

Energy Efficient

Spray Foam: They are relatively more efficient.

Fiberglass: The fiberglass insulation is less efficient comparatively.

Longevity or Lifetime

Spray Foam: They have a lifetime of more than 80 years.

Fiberglass: The lifetime of the fiberglass is 10 to 25 years that too if the fiberglass manages to stay dry.


Spray Foam: They have the following benefits.

Stops moisture and air infiltration.

Makes the structure of the building stronger.

It will remain permanently and won’t sag.

Keeps pollen and dust out.

Reduces maintenance, capacity requirements & wear of the HVAC equipment.

Fiberglass: The only benefit of the fiberglass insulation in comparison is that its installation is cheaper than the spray foam insulation.

Fresh Insulation AustinTx Fresh Insulation is a leading Spray Foam Insulation Company in Austin Tx and we would like to thank them for sharing this information with our readers. Feel free to reach out to Fresh Insulation with any questions regarding insulation and home energy efficiency. Have a great day!