GAF EnergyGuard Grade-II (20 psi) Polyiso Roof Insulation, 2.7 in Thick, 4 ft x 8 ft Panels

GAF EnergyGuard Grade-II (20 psi) Polyiso Roof Insulation, 2.7 in Thick, 4 ft x 8 ft Panels

Regular price $35.71

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EnergyGuard Grade-II Polyiso Roof Insulation (2.7" x 4' x 8')

High-compressive-strength polyisocyanurate roof insulation with glass fiber–reinforced cellulosic felt facers. Designed for commercial roofing systems, delivering durability and thermal performance in a 2.7-inch thick 4x8 panel.


Key Features:

  • Durable Facers: Glass fiber–reinforced cellulosic felt facers bonded to polyiso core for strength
  • High Compressive Strength: Grade-II 20 psi rating for robust rooftop performance
  • Large Panel Coverage: 4 ft x 8 ft panels; 17 pieces per bundle covering 544 sq. ft.
  • Industry Approvals: Meets ASTM standards; FM Approved, UL Classified; Florida and Miami-Dade approvals; PIMA Quality Mark
  • Lightweight Handling: Approx. 17.152 lb per panel for easier installation

Specifications Table:

Specification Details
Thickness 2.7"
Dimensions 4' x 8'
Pieces per Bundle 17
Bundle Coverage 544 Sq. Ft. per Bundle
Compressive Strength 20 psi (Grade-II)
Facers Glass fiber–reinforced cellulosic felt
Core Polyisocyanurate foam
Approvals/Standards ASTM C1289 Type II (Class 1); ASTM D1621; ASTM D2126; ASTM C209; ASTM E96; ASTM E84; FM Approved; UL Classified; Florida Building Code Approved; Miami-Dade County Approved; PIMA Quality Mark
Unit of Measure SQ|PC
Item Weight 17.152 lb per panel
Manufacturer Number 20 2.7
Product Number GAF27ISO

Frequently Asked Questions (FAQ):

Q: What are the panel dimensions and thickness?
A: Each panel is 4 ft x 8 ft and 2.7 inches thick.


Q: How much area does one bundle cover?
A: A bundle of 17 panels covers approximately 544 square feet.


Q: What is the compressive strength rating?
A: Grade-II with a 20 psi compressive strength rating.


Q: What standards and approvals does it meet?
A: ASTM C1289 Type II (Class 1), ASTM D1621, D2126, C209, E96, E84; FM Approved; UL Classified; Florida Building Code and Miami-Dade County approvals; PIMA Quality Mark.


Q: What is the facer material?
A: Glass fiber–reinforced cellulosic felt facers bonded to a polyiso foam core.


Architectural Armor for Modern Roofscapes

This polyiso panel brings a clean, tailored profile to the rooftop, quietly elevating the envelope with resilient, high-compression strength. The glass fiber–reinforced felt facers lend a refined, matte finish that feels intentional and engineered. Layer it beneath membrane systems to craft a sleek, high-performance silhouette while maximizing coverage with generous 4x8 panels. Consider it the essential foundation for luxury commercial roofing—beauty built on endurance.


Choose EnergyGuard Grade-II to fortify your roof with proven 20 psi strength and broad coverage for lasting performance.

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