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Elevate ISO 95+ GL Grade-II Polyiso Roof Insulation Board, 3.5 in. x 4 ft. x 8 ft.
Regular price $57.00Orders start at $399 — combine any items to reach the minimum. Learn more
Elevate ISO 95+ GL Grade-II Polyiso Roof Insulation Board, 3.5 in. x 4 ft. x 8 ft.
This Elevate ISO 95+ GL Grade-II polyiso roof insulation board is 3.5 in. thick and measures 4 ft. x 8 ft., with a closed-cell polyiso foam core bonded to glass-reinforced mat facers. Sold as one piece, it provides high R-value per inch for low-slope commercial roofs and pairs with Elevate membrane systems.
Key Features:
- High R-value: Polyisocyanurate foam delivers the highest R-value per inch of common insulation systems.
- Grade-II 20 psi: Grade-II (20 psi) polyiso board rated for commercial roof assemblies.
- Glass mat facers: Closed-cell polyiso core is laminated to a glass-reinforced mat facer on both major surfaces.
- Broad approvals: FM Approved, UL Classified, Miami-Dade County Approved and PIMA Quality Mark certified.
- Standards listed: Meets ASTM C1289, Type II, Class 1 and CAN/ULC-S704, Type 1, Class 3.
- Full sheet size: 4 ft. x 8 ft. sheet covers 32 sq ft per board for efficient installation.
- LEED friendly: LEED-compatible product from an ISO 9001 registered manufacturing facility.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Elevate |
| Manufacturer model | W841113508 |
| Sell unit | 1 board, 3.5 in. x 4 ft. x 8 ft. |
| Product line | ISO 95+ GL (ISOGARD GL) |
| Profile / style | Flat insulation board |
| Color | Gray |
| Dimensions | 4 ft x 8 ft, 3.5 in. thick |
| Coverage per unit | 32 sq ft per board |
| Material | Polyisocyanurate foam with glass-reinforced mat facers |
| Compressive strength | 20 psi (Grade-II) |
| Thickness | 3.5 in. |
| Standards / approvals | ASTM C1289 Type II Class 1; CAN/ULC-S704 Type 1 Class 3; CCMC 13274-L; FM Approved; Miami-Dade Approved; UL Classified; PIMA Quality Mark; LEED; ISO 9001 facility |
| Weight | 22 lb per board |
| Intended use | Thermal insulation for commercial low-slope roofing |
Coverage & How Much You Need:
Each 4 ft. x 8 ft. board covers 32 sq ft of roof area. Divide total roof square footage by 32 to estimate board count and allow for cuts and waste.
Fit and Compatibility:
Designed for use under Elevate single-ply and modified bitumen membrane systems. Tapered ISOGARD GL boards and cover boards are available separately for drainage and protection.
Frequently Asked Questions (FAQ):
Q: What is included with my order?
A: One 3.5 in. x 4 ft. x 8 ft. Grade-II (20 psi) polyiso insulation board, sold per piece.
Q: How many boards do I need?
A: Each board covers 32 sq ft, so divide your roof area by 32 and add for waste and perimeter cuts.
Q: Can this be installed in multiple layers?
A: Yes, thicker assemblies are commonly built in staggered layers per the roofing system manufacturer's instructions.
Q: What facers does the board have?
A: A glass-reinforced mat facer is laminated to both major surfaces of the closed-cell polyiso core.
Q: Is the blowing agent ozone-safe?
A: Yes, ISOGARD GL uses an HCFC-free, EPA-accepted blowing agent that does not deplete the ozone layer.
Q: Which certifications apply?
A: The board is FM Approved, UL Classified, Miami-Dade County Approved, CCMC listed and carries the PIMA Quality Mark.
Expert Verdict — Reviewed by the SuperArbor Pro Desk
At 3.5 in., this board is a workhorse single-layer thickness for R-value-driven low-slope assemblies. Check the membrane system's approval listing for required board thickness and attachment, and stagger joints when layering. Follow with an approved cover board before membrane installation.
Secure large boards on the roof deck against wind and follow fall-protection and fire-safety requirements during installation.
Order the Elevate ISO 95+ GL 3.5 in. polyiso insulation board today for your low-slope roof project.
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