Froth-Pak Insulation Spray Foam
Safe and Effective Use of DuPont’s Froth-Pak Insulation Spray Foam For Contractors
As remodeling contractors, we frequently encounter the need to insulate the rim joist area on our projects. The rim joists (also known as band joists) and sill plates are often overlooked when it comes to insulation, but these areas are critical for energy efficiency, comfort, and moisture control in a home. The rim joist is a cavity where the floor joists connect to the foundation sill and wall.
Red Area: Uninsulated Rim Joist
Why Insulating Rim Joists and Sill Plates Matters
If left untreated, rim joists and sill plates can become major sources of air leakage, moisture problems, and pest infiltration. These areas are notorious for drafts, leading to higher heating and cooling costs and a less comfortable home for the occupants. To prevent air leaks, mold, and rot, the best practice is to seal and insulate the rim joist and sill plate areas with materials like rigid foam or spray polyurethane foam.
Old Methods vs. Best Practices
In the past, many contractors insulated rim joists by stuffing fiberglass batt insulation into the bays. While this approach may have been common, it’s no longer considered the best practice. Since around 2018, the industry has shifted toward more effective, airtight methods that prevent air and moisture infiltration. Best practice now involves fully sealing all gaps and cracks and using advanced insulation techniques.
A Real-World Example: Saving Big with DIY Insulation
Instead of paying my spray foam contractor the minimum visit cost of $2,400 to insulate the sill plates in my 1863 vintage house, I decided to take matters into my own hands and tackle the project myself.
Using DuPont Froth-Pak spray foam, I was able to fully insulate the rim joist and sill plate area for under $500 all in—a savings of over $1,900!
By doing it myself, I was able to get a high-quality, air-tight seal without the premium price tag. The Froth-Pak system is easy to use and provides an efficient, professional-level finish, making it a great option for anyone looking to tackle this job without breaking the bank.
But like any powerful tool, proper use and safety are key. In this video, I’m going to walk you through how to use Froth-Pak Spray Foam safely and effectively on your job site.”
What Is Froth-Pak?
Froth-Pak is a quick-cure, two-component polyurethane foam that’s perfect for filling larger gaps and penetrations, improving energy efficiency, and providing long-lasting insulation. It’s ideal for a wide variety of applications—whether you’re working on attics, basements, rim joists, roof perimeters, or wall cavities. But before we dive into how to use it, let’s talk about safety.
Froth-Pak Precautions
The right PPE and precautions are a must.
Now, before you start spraying, check that your Froth-Pak tank temperature is between 70°F-90°F. This ensures you’re getting the best foam consistency and performance. Attach your hoses securely with a 5/8” wrench—no leaks here.
Apply a little petroleum jelly to the inside face of your gun and the edges of the ports. It makes the foam flow smoother and prevents any mess. Trust me, this little step can save you a lot of time and headaches.
When you’re ready to start spraying, ensure that you’re working in a well-ventilated area. Aim for a minimum of 10 air changes per hour. If you’re spraying indoors, make sure no one enters the area without PPE for at least one hour after application—safety comes first
Reasons To Choose Froth-Pak
One of the reasons Froth-Pak is a game-changer is because it’s designed to cover more area, with better yield and less mess. Plus, the newly designed helical nozzle improves mixing, reduces drips, and means fewer nozzle changes. It’s the total package, giving you more control and a smoother application.
Froth-Pak cures fast—tack-free in just 30 seconds—and with a Class-A fire rating up to 2 inches thick, you’re not only improving insulation but also fire safety. Whether you’re working on residential, commercial, or industrial spaces, it’s versatile, reliable, and efficient.
The product’s high yield, long shelf life, and zero ozone-depleting chemicals make it a top choice for contractors like you. And with proper installation, you’ll be improving the energy efficiency of your clients’ homes, reducing moisture, and preventing mold and mildew.
DOs and DON’Ts for working with Froth-Pak Foam
DOs:
- DO wear full PPE: coveralls, gloves, goggles, and respirator.
- DO ensure your tank temperature is between 70°F-90°F.
- DO apply petroleum jelly to the gun for smooth operation.
- DO ventilate during and after spraying.
- DO use Froth-Pak for its intended purposes—sealing and insulating gaps.
DON’Ts:
- DON’T spray without the required PPE.
- DON’T use if sensitized to isocyanates.
- DON’T re-enter without proper ventilation—wait at least one hour.
- DON’T handle foam with bare hands—always wear gloves.
- DON’T use near heat sources or ignition points.
Conclusion
By following these simple guidelines, you’ll get the best performance out of Froth-Pak and keep everyone safe on the job site. If you want to purchase Froth-Pak, check out the link below to find a retailer near you, and don’t forget to get certified in safe handling and application.
For more tips and tricks on using Froth-Pak, be sure to subscribe to our channel and follow us on YouTube for all the latest updates and videos. Thanks for watching, and happy insulating!
Stay safe, stay efficient, and keep building with Froth-Pak.
