RetroFoam Injection Foam Insulation for Existing Walls

Because Cold Drafts and Huge Temperature Swings Between the Rooms in Your Home is Not the Norm

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Ditch the Blankets and Extra Layers of Clothes with the Help of Retrofit Exterior Wall Insulation

You are sitting in your home during the winter and feel an annoying, cold draft.

Unfortunately, nobody forgot to shut the door - it is just another day in an uncomfortable home with insufficient or no wall insulation. Insulating the exterior wall cavities with RetroFoam injection foam will compress any old insulation in the walls and seal up the area to prevent air leakage - helping to reduce drafts, keep rooms more comfortable, control energy costs, and deaden outside noise.

Ten-minute video explaining all you need to know about injection foam insulation for your existing walls.

Updating Your Exterior Wall Insulation with RetroFoam Injection Foam is a Great Decision for Your Family’s Comfort

A More Comfortable Home is Within Reach

The easy and convenient install process turns your family’s dream of a comfortable home into a reality - without the stress and mess of a full remodel.


Insulating Your Existing Walls with RetroFoam of Michigan

We’ve been insulating existing homes across Michigan with spray and injection foam for over 17 years.

Our consultative project managers, highly skilled crews, and helpful office staff aim to guide you through the whole process with ease. Also, our lifetime warranty gives your family access to our family long after the job is complete.

Our process for retrofit exterior wall insulation is quick, simple, and typically installed in just one day. Most walls are insulated from the outside, but we can also inject foam into walls from the inside if needed. However, the install process is slightly different depending on the home’s siding type.

Vinyl and Aluminum Siding

A strip of siding is removed from your home and holes are drilled between the stud cavities. After injecting the foam insulation in the cavity we plug the hole, put your siding back on, and clean up any excess foam.

Wood Siding

Depending on the condition and make of your wood siding, we may be able to remove it and follow the same process we do for vinyl and aluminum siding. If we aren’t able to remove it, we would drill through the siding to inject the foam, then plug the hole with a tapered wood plug.

Brick Exterior

We can also insulate through a brick exterior without removing any brick.

Our installers drill ⅝ inch holes through the mortar joints to inject the foam insulation, and the holes are re-mortared upon completion using a standard gray mortar.

Concrete Block Walls

Concrete block walls can be insulated by using either spray foam or injection foam, depending on the look the homeowner wants to accomplish.

The foam can be sprayed directly on the concrete wall, or in some cases, it can be injected into the cores of the concrete blocks.

Our Start to Finish Process

  • Scheduling a Free Estimate
  • Creating a Personalized Plan for Your Project
  • Schedule, Prep, and Install your Insulation
  • Follow Up and Warranty

Learn More About Our Process


"… The RetroFoam Crews were exceptional, courteous, and answer all of my barrage of questions. The attic is perfect and you can’t even see where they drilled the holes in the mortar for the exterior wall insulation. I didn’t need to do anything!"

Jason Sobick

“Awesome company - great work! Made a huge difference in not only insulation for heat/cool temps but cuts down on noise too. Would highly recommend them.”

Beth Yoskovich

Learn More About Injection Foam Insulation for Your Existing Walls

Frequently Asked Questions

What’s the difference between injection and spray foams?

How do the crews know when a wall cavity is full?

Can the drywall pop off or crack in existing walls during installation?

How does siding effect how exterior walls are insulated?

How much does it cost to insulate walls with injection foam?

What happens to the old insulation in the walls when injection foam is installed?

What if I need electrical work done?

What causes condensation on interior walls?

Can you insulate existing interior walls?

Should I insulate the wall between my garage and house?

How can I tell if my wall is insulated?

Tell cold drafts and uncomfortable rooms who’s the boss.

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