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GenFlex GL ISO Polyiso Roof Insulation

A versatile, high efficiency polyiso insulation board designed for use with virtually all membrane roofing systems. Also available in tapered configurations to promote positive drainage and extend roof life.

Overview        |          Options         |         Documents         |         Videos         |         Accessories

Overview

Perfect for use with virtually all membrane roofing systems, GenFlex GL ISO is a highly efficient thermal insulation board with a polyisocyanurate foam core bonded to fiber-reinforced facers. It is approved for new construction and reroofing over virtually all roof deck types. It is especially suited for FM Approved and UL Classified direct-to-deck applications/assemblies without an additional thermal barrier in most installations.

Installation methods

Options

Size Thickness
Size 4 ft x 4 ft (1.22 m x 1.22 m)
Thickness ½ in to 4.5 in (12.7 mm to 114.3  mm)
Size 4 ft x 8 ft (1.22 m x 2.43 m) flat and tapered
Thickness ½ in to 4.5 in (12.7 mm to 114.3  mm)

Documents

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PDS 901 GenFlex ISO Flat and Taper
PDS 901B GenFlex GL ISO
PDS 950 ISO Fastening Pattern
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LTTR Reference Card
Polyiso Brochure
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SDS – GENFLEX GL ISO – USA-EN
SDS – GENFLEX ISO (Flat and Tapered Polyiso Boards) – USA-EN

*See the SDS Portal for additional languages.

GL ISO Accessories

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Sample Warranties

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Commercial Building Membrane Limited Warranty (Tear-Off Warranty)_Distributors_2021
GenFlex Domestic Warranty Pricing Guide 2025
GenFlex Lifetime Residential Material Limited Warranty
GF-Limited Membrane Only-10-20-Yrs-SAMPLE
Paint Finish Warranty – 35 Yrs – SAMPLE 2008
Roofing System Limited Warranty – 5-20 years – 100 MPH – CP – SAMPLE 2003
Roofing System Limited Warranty – 5-20 years – 100 MPH – Hail – CP – SAMPLE 2003
Roofing System Limited Warranty – 5-20 years – 100 MPH – Hail – SAMPLE 2003
Roofing System Limited Warranty – 5-20 years – 100 MPH – SAMPLE 2003
Roofing System Limited Warranty – 5-20 years – 55 MPH – CP – SAMPLE 2003
Roofing System Limited Warranty – 5-20 years – 55 MPH – Hail – CP – SAMPLE 2003
Roofing System Limited Warranty – 5-20 years – 55 MPH – Hail – SAMPLE 2003
Roofing System Limited Warranty – 5-20 years – 55 MPH – SAMPLE 2003
Roofing System Limited Warranty – 5-20 years – 72 MPH – CP – SAMPLE 2003
Roofing System Limited Warranty – 5-20 years – 72 MPH – Hail – CP – SAMPLE 2003
Roofing System Limited Warranty – 5-20 years – 72 MPH – Hail – SAMPLE 2003
Roofing System Limited Warranty – 5-20 years – 72 MPH – SAMPLE 2003
Roofing System Limited Warranty – 5-20 years – 80 MPH – CP – SAMPLE 2003
Roofing System Limited Warranty – 5-20 years – 80 MPH – Hail – CP – SAMPLE 2003
Roofing System Limited Warranty – 5-20 years – 80 MPH – Hail – SAMPLE 2003
Roofing System Limited Warranty – 5-20 years – 80 MPH – SAMPLE 2003
Roofing System Limited Warranty – 5-20 years – 90 MPH – CP – SAMPLE 2003
Roofing System Limited Warranty – 5-20 years – 90 MPH – Hail – CP – SAMPLE 2003
Roofing System Limited Warranty – 5-20 years – 90 MPH – Hail – SAMPLE 2003
Roofing System Limited Warranty – 5-20 years – 90 MPH – SAMPLE 2003