The amount of time it takes to spray foam a house will depend on the size of the project. And there are a few other factors that determine how long the install will take.

With more than 20 years of experience, RetroFoam of Michigan’s installation crews are a fine-tuned machine. Most houses can be insulated in one day or less, and it can take two if we are insulating the attic, crawl space, or rim joist, as the first day would be the removal of old insulation.

Let's take a deeper dive into how long it takes to insulate different areas of the house.

How Long Does it Take to Spray Foam a House?

The area that is being insulated and the degree of difficulty of the job are the two main factors associated with the time length of the installation.

Here is what the time frame looks like for different areas of the home.

All Existing External Walls

Injecting foam insulation into existing walls could take two to five hours on average.

The time it takes to inject the foam into the walls depends on the size of the area, siding type, if the home is one or two stories, and any bump-outs in the home design.

Attic Spray Foam Insulation

Insulating an attic with spray foam insulation could take one to two days.

This depends on how much old insulation in the attics must be removed.

A separate removal crew may come out a day or two before the installation date to remove the old insulation.

Once the install crew is there, the attic can be insulated in a day in most cases. Factors on time include the pitch of the attic and accessibility difficulties to certain areas.

Crawl Space Spray Foam Insulation

A crawl space installation can take two to three hours to do.

Factors include if any old insulation needs to be removed and any accessibility challenges like hard-to-reach areas due to the design of the crawl space.

Rim Joist Spray Foam Insulation

Insulating a rim joist usually takes around one to two hours.

If fiberglass needs to be removed, or if the rim joist is hard to reach due to basement design or things in the way, the installation job could take longer.

Spray Foam Insulation for Your Home

So, how long does insulation take to install?

Every house is unique, so times to install foam insulation may vary. Generally, the removal and install usually take two days.

If you’re looking for more answers to your questions about foam insulation for your project, check our Learning Center.

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