Duro-Last ISO HD Composite - 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 HD Composite
1 of 2 www.duro-last.com 800-248-0280
Figure 1. Duro-Guard ISO HD Composite (Top Layer)
Description:
Duro-Guard ® ISO HD Composite is comprised of
½ inch high density polyisocyanurate (ISO) cover
board laminated during the manufacturing process to
Duro-Guard ISO III rigid roof insulation. R-value is
optimized with a thinner profile.
 Eliminates the need for a cover board while
saving on inter-ply adhesive and labor.
 Manufactured with a blowing agent that has
zero ozone depletion potential (ODP) and
virtually no global warming potential (GWP).
 Recycled content of cover board > 8%.
 Approved for direct application to steel and
other deck types.
 Top layer of ½ inch high density ISO provides
100 psi compressive strength.
 The bottom layer of Duro-Guard ISO III is
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).
 Passes ASTM Resistance to Mold Test.
 Refer to Tables 2 and 3 for physical properties.
Recommended Uses:
 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:
 In some cases, use of this product may result
in a Class A or B fire rating over a combustible
deck without the use of a fire rated slip sheet or
board. Refer to Duro-Last’s UL Listings
(TGFU.R10128) for assembly details.
 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, wood,
concrete and gypsum roof 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: 2 to 4.5 inches.
 Refer to Table 1 for R-value and flute
spanability.
TABLE 1. THERMAL VALUES
THICKNESS
LTTR
R-VALUE*
FLUTE SPANABILITY
inches mm inches mm
2.00 51 11.00 4.375 111
2.25 57 12.10 4.375 111
2.50 64 13.90 4.375 111
3.00 76 16.90 4.375 111
3.25 83 18.10 4.375 111
3.50 89 19.90 4.375 111
4.00 102 23.00 4.375 111
4.25 108 24.20 4.375 111
4.50 114 26.10 4.375 111
* R-Value is calculated by adding the R-value of the cover board
and the R-value of Duro-Guard ISO III together.