Duro-Last ISO NB - Manual

Duro-Last, “World’s Best Roof” and Duro-Guard are registered marks owned by Duro-Last, Inc.
Updated: 10/31/2013
DURO-GUARD
®
ISO NB
1 of 2 www.duro-last.com 800-248-0280
TABLE 1. THERMAL VALUES
THICKNESS* LTTR
R-VALUE
FLUTE SPANABILITY
(inches) (mm) (inches) (mm)
1.50 38 6.20 4.625 111
2.00 51 9.10 4.375 111
2.50 64 12.00 4.375 111
3.00 76 15.00 4.375 111
3.50 89 18.00 4.375 111
4.00 102 21.10 4.375 111
4.50 114 24.20 4.375 111
* Contact Duro-Last for additional thickness options.
Figure 1. Duro-Guard ISO NB (Top Layer)
Description:
Duro-Guard ® ISO NB is a rigid roof insulation
composite panel composed of a closed cell
polyisocyanurate foam core bonded during the
manufacturing process to fiber reinforced facers on
one side and either 7/16 or 5/8 inch oriented strand
board (OSB) on the other.
 A superior combination of high insulating
properties and a nailable surface.
 Foam core manufactured with a blowing agent
that has zero ozone depletion potential (ODP)
and virtually no global warming potential
(GWP).
 Approved for direct application to steel and
other deck types.
 Duro-Guard ISO NB is not a structural
panel, and is suitable only for installation
over fully supported structural decks.
 Incorporates APA-TECO Rated Exposure 1
OSB.
 Also available with plywood.
 Foam core available in two grades of
compressive strength per ASTM C 1289.
o Type II, Class 1, Grade 2 (20 psi).
o Type II, Class 1, Grade 3 (25 psi).
 Refer to Table 2 for physical properties.
Recommended Uses:
 Underlayment for Exceptional ® Metals standing
seam metal roofs.
 Mechanically attached Duro-Last ® roof
systems.
 Adhered/Fully Bonded Duro-Last roof systems.
 Duro-Bond
® roof systems.
 Metal retrofit roof systems.
Underwriters Laboratories, Inc. Classifications:
 UL 1256.
 Insulated Metal Deck Constructions:
o No. 120, 123, 292.
 UL 790.
 UL 263 Hourly Rated P Series Roof
Assemblies.
 UL Classified for use in Canada.
Factory Mutual Approvals:
 FM 4450, FM 4470.
 Approved for Class 1 insulated steel deck
construction.
 Refer to FM Approval’s RoofNav for details on
FM Approved systems (www.roofnav.com).
Flat Panels:
 Available sizes:
o 4 ft. x 4 ft.
o 4 ft. x 8 ft.
o Thicknesses: 1.5 to 4.5 inches.
 Refer to Table 1 for R-value and flute
spanability.