Duro-Last ISO Foil - 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 FOIL
FLAT AND TAPERED PANELS
1 of 2 www.duro-last.com 800-248-0280
Figure 1. Duro-Guard ISO Foil On Steel Deck
Description:
Duro-Guard ® ISO Foil is a closed-cell
polyisocyanurate foam core insulation board with
integrally laminated foil facers which are compatible
with Duro-Last
® roof membranes.
 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 decks.
 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.
 This product is not intended as a substitute for
a vapor retarder.
 Duro-Last membrane shall not be adhered to
this product.
 This product is not an acceptable substrate for
the Duro-Bond ® System.
Recommended Uses:
 Mechanically attached Duro-Last 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 to 4 inches.
 Refer to Table 1 for R-value and flute
spanability.
* Contact Duro-Last for additional thickness options.
TABLE 1. THERMAL VALUES
THICKNESS* LTTR
R-VALUE
FLUTE
SPANABILITY
inches mm inches mm
1.00 25 5.60 2.625 67
1.50 38 8.50 4.375 111
1.60 41 9.10 4.375 111
1.70 43 9.60 4.375 111
2.00 51 11.40 4.375 111
2.50 64 14.40 4.375 111
2.70 69 15.60 4.375 111
3.00 76 17.40 4.375 111
3.30 84 19.20 4.375 111
3.50 89 20.50 4.375 111
3.60 91 21.10 4.375 111
4.00 102 23.60 4.375 111