InsulBase Grade-III 25 psi Polyiso Roof Insulation Panel
Rigid polyisocyanurate roof insulation with a closed-cell foam core bonded to glass-reinforced felt on both faces. Designed for durable thermal performance and compressive strength for commercial roofing assemblies.
Key Features:
- High Compressive Strength: Grade-III core rated at 25 psi for robust rooftop traffic resistance
- Enhanced Durability: Closed-cell polyiso foam laminated with glass-reinforced felt facers
- Standard Size Coverage: 4' x 8' panels simplify layout and speed installation
- Optimized Thickness: 2.1" profile balances R-value and system build-up
- Code-Compliant: Meets multiple industry standards, including ASTM C1289 and IBC Section 2603
Please check the Product Data Sheet Here
Specifications Table:
| Specification | Details |
| Thickness | 2.1" |
| Dimensions | 4' x 8' |
| Style | Polyiso |
| Compressive Strength | 25 psi (Grade-III) |
| Core | Closed-cell polyisocyanurate foam |
| Facers | Glass-reinforced felt (GRF) on both sides |
| Item Weight | 15.79 lb per panel |
| Applicable Standards | ASTM C1289 Type II Class 1 Grade 2; IBC Section 2603; UL 790; UL 263; UL 1256; FM 4450/4470 Class 1; California Title 24; PIMA Quality Mark Approved; CAN/ULC S704 Type 2 & 3 Class 3; Florida Building Code Approved; CDPH Compliant; UL Classified; LEED |
| Manufacturer Number | 323385 |
| Product Number | CAR21INSBP4825 |
| Unit of Measure | SQ|PC |
Frequently Asked Questions (FAQ):
Q: What are the panel dimensions and thickness?
A: Each panel is 4 feet by 8 feet and 2.1 inches thick.
Q: What facers are used on this insulation?
A: Glass-reinforced felt (GRF) facers are laminated to both sides of the polyiso core.
Q: Is this product approved for use under common building codes?
A: Yes. It lists compliance with ASTM C1289, IBC Section 2603, UL 790/263/1256, FM 4450/4470 Class 1, and other approvals.
Q: What is the compressive strength rating?
A: Grade-III panels are rated at 25 psi compressive strength.
Q: What is the unit of measure for ordering?
A: Listed as SQ|PC; panels are commonly ordered per piece.
Sculpted Strength with Tailored Warmth
This polyiso panel brings a refined, architectural sensibility to roofingsleek, uniform, and purposefully engineered. The glassreinforced felt facers offer a clean, tailored surface that integrates seamlessly into high-performance assemblies. Layer it to achieve crisp roof lines and thermal serenity without bulk. Its an essential foundation for spaces that demand durability and understated luxury.
Choose InsulBase Grade-III to elevate your roof system with dependable strength and streamlined installation.
