Elevate ISO 95+ GL Grade-II (20 psi) Polyiso Roof Insulation Board, 3.25 in. x 4 ft x 4 ft

This Elevate ISO 95+ GL Grade-II polyiso roof insulation board is a 3.25 in. thick, 4 ft x 4 ft flat panel with a closed-cell polyisocyanurate foam core laminated to a glass-reinforced mat facer on both surfaces. One piece is the sell unit. Pair it with Elevate membrane, adhesives and fasteners as part of a complete commercial roofing assembly.

Key Features:

• High thermal value: Polyisocyanurate foam delivers among the highest R-value per inch of common insulation systems.
• GL glass facer: A glass-reinforced mat facer is laminated to both major surfaces of the closed-cell foam core.
• Grade-II 20 psi: Grade-II compressive strength rating (20 psi) suits commercial low-slope roofing assemblies.
• Compact 4×4 size: The 4 ft x 4 ft board is easier to handle and maneuver than full 4 x 8 sheets.
• ODP-free blowing agent: Uses an HCFC-free blowing agent that does not contribute to ozone depletion.
• Code approvals: FM Approved, Miami-Dade County Approved, UL Classified, CCMC 13274-L and PIMA Quality Mark listed.

Specifications Table:

Coverage & How Much You Need:

Each 4 ft x 4 ft board covers 16 sq ft of roof area. Divide total roof square footage by 16 to estimate board count, and check the specified system assembly for the required total insulation thickness.

Fit and Compatibility:

Designed for use in Elevate commercial low-slope roofing systems; install per Elevate specifications with compatible membranes, adhesives and fasteners (sold separately). Confirm board thickness and layering against the project specification.

Frequently Asked Questions (FAQ):

Q: What is included with my order?
A: One 3.25 in. thick, 4 ft x 4 ft flat polyiso insulation board.

Q: How many boards do I need?
A: Each board covers 16 sq ft; divide your roof area by 16 and confirm the total thickness your roofing specification requires.

Q: What compressive strength does this board have?
A: It is a Grade-II board rated at 20 psi.

Q: Which standards does it meet?
A: It meets ASTM C1289 Type II, Class 1 and CAN/ULC-S704 Type 1, Class 3, and is FM Approved, UL Classified and Miami-Dade County Approved (CCMC 13274-L).

Q: Can it be used under any membrane?
A: It is intended for low-slope commercial roofing assemblies; follow the membrane manufacturer’s system specification for acceptable board and attachment methods.

Q: How much does one board weigh?
A: A single 3.25 in. 4 x 4 board weighs approximately 12 lb.

Expert Verdict Reviewed by the SuperArbor Pro Desk

The 4 ft x 4 ft format is handy where roof access is restricted or for filling small areas and odd-shaped zones within a polyiso assembly. Stagger joints between layers to limit thermal bridging and produce a flatter substrate for the membrane. Match total thickness to the project R-value target and confirm deck type, attachment and wind-uplift requirements before ordering fasteners or adhesives.

Handle rigid boards carefully on the roof and follow manufacturer instructions and local building code for attachment and wind-uplift requirements.

Order the Elevate ISO 95+ GL Grade-II 3.25 in. 4 ft x 4 ft polyiso insulation board for your roofing project today.