Roofer         Distributor         Design Pro         Owner

GenFlex NB ISO Polyiso Insulation Board

A durable, nailable composite insulation board featuring a polyiso foam core laminated to a 7/16″ OSB surface and a black glass-reinforced mat facer.

Overview        |          Options         |         Documents         |         Videos         |         Accessories

Overview

GenFlex NB ISO consists of a polyiso foam core laminated to a 7/16” oriented strand board (OSB) on one side and a black glass reinforced mat facer on the other side. This nailable OSB surface protects the roof against accidental punctures, hail and winds up to 100 mph. It is suitable for use with EPDM, TPO, modified bitumen and metal roofing systems.

Installation methods

Options

Size Thickness
Size 4 ft x 4 ft (1.22 m x 1.22 m)
Thickness 1.5 in (38.1 mm) min. to 4 1/2 in (114.3 mm)
Size 4 ft x 8 ft (1.22 m x 2.43 m) flat and tapered
Thickness 1.5 in (38.1 mm) min. to 4 1/2 in (114.3 mm)

Documents

TitleLink
PDS 905 Nailbase NB Composite Board
PDS 905B GenFlex Nailbase NB ISO
PDS 950 ISO Fastening Pattern
TitleLink
TitleLink
TitleLink
TitleLink
LTTR Reference Card
Polyiso Brochure
TitleFile TypeLink
TitleFile TypeLink
TitleFile TypeLink
TitleFile TypeLink
TitleFile TypeLink
TitleFile TypeLink
TitleFile TypeLink
TitleFile TypeLink
TitleFile TypeLink
TitleFile TypeLink
TitleLink
TitleLink
SDS – GenFlex NB ISO – USA-EN
SDS – GenFlex NB ISO with add – USA-EN

*See the SDS Portal for additional languages.

NB ISO Accessories

Quick Dual

No Accessories Found

No Accessories Found

No Accessories Found

No Accessories Found

No Accessories Found

No Accessories Found

No Accessories Found

No Accessories Found

Sample Warranties

TitleLink
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