PolyCon PC 450 Open Cell Spray Foam Now Certified to Appendix U
No Ignition Barrier Required
Upgrade Your Insulation Offering
PolyCon's PC 450 Open Cell Spray Foam (no-mix Required) has officially passed the rigorous
Appendix U testing protocol, offering unmatched installation flexibility and cost savings
without compromising safety or code compliance.
What Is Appendix U?
Appendix U, adopted by the International Code Council in 2023, provides a standardized path
to code compliance for open cell spray foam used in unvented attics with a downward
opening hatch. Systems that pass this test do not require an ignition barrier such as
intumescent coatings.
Key Advantages of PC 450 with Appendix U Certification:
1. No Ignition Barrier Required
• Installs directly to the underside of roof decks and attic walls
• Eliminates the cost, labor, and time of applying coatings
2. Faster Installs & Lower Labor Costs
• One-crew, one-step install
• No need to schedule or wait for coating application
3. Simplified Code Compliance
• Recognized compliance pathway under IRC Section R316.5.3 –
o Specific approvals and IRC Section R302.9.4 Alternative Test Method
• Easier approval by building officials and inspectors
• Does not require a specific brand of attic hatch, just a downward opening hatch
• Compliant with up to 14” on walls and ceilings
4. Improved Profit Margins
• Fewer materials and labor = higher contractor profitability
• Makes open cell foam more price competitive
5. Enhanced Marketability
• Boosts your value proposition to builders and homeowners
• Promotes fire safety, efficiency, and simplicity in one system
Real-World Applications:
• Unvented attics with a downward opening
• Retrofit insulation upgrades
• High-performance residential homes
• Code-sensitive jurisdictions
Certified & Trusted
PC 450 passed full-scale fire testing per ICC-ES AC377 Appendix U using:
• Full-depth cavity fill
Test Report: RTL0972-7 – Dated April 30, 2025
Call Today!
Contact PolyCon Sales
Email: info@polyconspf.com
Phone: 1-855-PC1-FOAM
Published by Spray Foam Magazine
SprayFoam / Spray Foam Insulation
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