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Elevate ISO 95+ GL Grade-II Polyiso Roof Insulation Board, 3.75 in. x 4 ft. x 8 ft.
Regular price $58.00Orders start at $399 — combine any items to reach the minimum. Learn more
Elevate ISO 95+ GL Grade-II Polyiso Roof Insulation Board, 3.75 in. x 4 ft. x 8 ft.
This Elevate ISO 95+ GL Grade-II polyiso roof insulation board is a 3.75 in. thick, 4 ft. x 8 ft. flat panel with a closed-cell polyiso foam core laminated to glass-reinforced mat facers. Sold as one piece, it delivers high R-value per inch for commercial low-slope roofing and pairs with Elevate membrane systems and cover boards.
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 for use beneath approved roofing membranes.
- 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.
- LEED friendly: LEED-compatible product manufactured in an ISO 9001 registered facility.
- Full sheet size: Large 4 ft. x 8 ft. sheet covers 32 sq ft per board for faster installation.
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Elevate |
| Manufacturer model | W841113758 |
| Sell unit | 1 board, 3.75 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, 3.75 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 | 3.75 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 | 23 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 plan layout per the membrane manufacturer's instructions.
Fit and Compatibility:
Designed for use under Elevate single-ply and modified bitumen membrane systems on commercial low-slope roofs. 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 3.75 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 layout waste and perimeter conditions.
Q: Is this board suitable under single-ply membranes?
A: Yes, it is a flat polyiso insulation board made for commercial low-slope roofing applications; install 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
Polyiso gives the highest R-value per inch of common insulation options, so this 3.75 in. board is an efficient choice when targeting R-value in a thin assembly. Verify board thickness and attachment against the membrane system's FM or UL listing, and use layers to stagger joints. Pair with an approved cover board before adhering single-ply membrane.
Handle large 4 ft. x 8 ft. boards with care on windy rooftops and follow fall-protection and fire-safety requirements during installation.
Order the Elevate ISO 95+ GL 3.75 in. polyiso insulation board today to build R-value into your low-slope roof assembly.
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