PIR
Industry-standard thermal core
Polyisocyanurate, the industry-standard high-performance thermal core with built-in fire-retardant properties. The workhorse of premium cold storage and industrial applications.
Technical Profile
Key properties
The story
The core that built the modern cold chain.
Polyisocyanurate did not become the global standard for insulated panel construction by accident. Its chemistry — a rigid closed-cell foam formed by reacting isocyanates with polyols — delivers a thermal efficiency that foams developed decades later still struggle to match at equivalent density. PIR was the material that made refrigerated logistics viable at scale in the 1990s, and it has continued to evolve. Royal Havilah sources PIR to a tighter specification than the market average, requiring consistent cell structure and foil bonding strength across every batch. The result is a core that performs to its rated conductivity over decades, not just on the day it leaves the factory. If you are specifying for a project where longevity and proven performance matter more than novelty, PIR is the honest choice.
Multi-product range
Available across Sandwich Panel, Roof, Board, Royal Duct, and Royal Pipe
Decades of proven data
More real-world thermal performance data than any other foam core type
Consistent cell structure
Royal Havilah batches tested to tighter tolerances than industry standard
Where it performs
Ideal Applications
Specify PIR for your project
Our engineers will help you select the right core, thickness, and facing for your performance requirements.