Add Insulation to Your Home Without Tearing It Apart
A retrofit adds insulation to walls that are already built and finished — no demolition, no construction mess, no months-long project. One day and it's done.
What Is a Retrofit?
New Construction Gets Insulation During the Build. Existing Homes Need a Different Approach.
When a new home is built, insulation goes in before the drywall — it's easy. But millions of homes across the Pacific Northwest were built when insulation standards were minimal or nonexistent. Those homes have hollow wall cavities that leak heat all winter.
A retrofit is the process of adding insulation to those finished walls after the fact. The challenge is doing it without gutting the interior. RetroFoam was engineered specifically for this — injected through small access holes, it fills cavities completely without any demolition.
The difference between a retrofitted home and an uninsulated one is dramatic: rooms hold temperature, heating bills drop, and cold drafts disappear — often after a single day of work.
Signs You Need a Retrofit
Your home may have uninsulated walls if you notice:
Rooms that are cold in winter even with the heat running
Exterior walls that feel cold to the touch
Heating or cooling bills that seem high for your home's size
Noticeable drafts along exterior walls
A home built before 1990 — many had minimal or no wall insulation
Traffic noise or rain clearly audible through exterior walls
Comparison
RetroFoam vs. Other Retrofit Options
Not all retrofit approaches are equal. Here's how the main options compare for finished homes.
Factor
RetroFoam Injection
Blown-In Insulation
Open-Wall (Demo)
Drywall removal required
No
Usually not
Yes — full tear-out
Fills entire cavity
Yes — flows around obstacles
No — settles, leaves voids
Yes
Air sealing
Yes
No
Requires extra step
Settles over time
No — cures rigid
Yes
No
Disruption level
Minimal — one day
Low
High — weeks of work
Warranty
Lifetime
Limited
Varies
Why Blown-In Falls Short for Retrofits
Blown-in cellulose or fiberglass is sometimes marketed as a retrofit solution, but it has a fundamental problem: it relies on gravity. In a wall cavity, this means it settles to the bottom over time, leaving gaps at the top. It also bridges over blocking, pipes, and wires rather than filling around them. And because it's loose-fill, it doesn't air-seal — cold air still infiltrates through the same paths it always did. RetroFoam's injection process fills around every obstacle and cures in place, permanently.
Is Your Home Ready for a Retrofit?
We'll assess your walls, confirm which cavities need filling, and give you a clear picture of what the project looks like — before you commit to anything.
