Duro-Last ISO NB User Manual

DURO-GUARD® ISO NB

Description:

Duro-Guard 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

 Foam core manufactured with a blowing agent

 Approved for direct application to steel and

 Duro-Guard ISO NB is not a structural

 Incorporates APA-TECO Rated Exposure 1

 Also available with plywood.

 Foam core available in two grades of

 Refer to Table 2 for physical properties.

Recommended Uses:

 Underlayment for Exceptional

 Mechanically attached Duro-Last

 Adhered/Fully Bonded Duro-Last roof systems.

 Duro-Bond

 Metal retrofit roof systems.

Underwriters Laboratories, Inc. Classifications:

 UL 1256.

 Insulated Metal Deck Constructions:

 UL 790.

 UL 263 Hourly Rated P Series Roof

 UL Classified for use in Canada.

ISO NB is a rigid roof insulation

properties and a nailable surface.

that has zero ozone depletion potential (ODP) and virtually no global warming potential (GWP).

other deck types.

panel, and is suitable only for installation over fully supported structural decks.

OSB.

compressive strength per ASTM C 1289.

o Type II, Class 1, Grade 2 (20 psi). o Type II, Class 1, Grade 3 (25 psi).

Metals standing

seam metal roofs.

roof

systems.

roof systems.

o No. 120, 123, 292.

Assemblies.

Figure 1. Duro-Guard ISO NB (Top Layer)

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.

TABLE 1. THERMAL VALUES

THICKNESS*

(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.

LTTR

R-VALUE

FLUTE SPANABILITY

Duro-Last, “World’s Best Roof” and Duro-Guard are registered marks owned by Duro-Last, Inc.

1 of 2 www.duro-last.com 800-248-0280

Updated: 10/31/2013

ast.co

800

DURO-GUARD® ISO NB

Installation:

 Panels must be kept dry before, during and

after installation. Install only as much insulation as can be covered the same day with completed roofing.

 The use of multiple layers of insulation with

joints staggered a minimum of 6 inches between layers is recommended to eliminate thermal bridging.

 Abut panel edges together and stagger joints of

adjacent panels.

 Boards must be neatly fitted to roof deck and

around penetrations with no gaps greater than ¼ inch.

 Refer to the appropriate Duro-Last roof system

specification and detail drawings for deck preparation and attachment requirements.

 Precautions must be taken to ensure that new

concrete decks have fully hydrated and do not continue to release moisture.

Panel Attachment:

 Panels may be attached to the roof deck using

mechanical fasteners, insulation adhesive or hot bitumen. It is acceptable to use these products in combination.

Mechanical Attachment

 When installing multiple layers (which may

include insulation, cover boards and thermal barriers) it is acceptable to mechanically secure through all layers.

 Use fasteners intended for use with this

product and that are supplied by or approved by Duro-Last, Inc.

Adhesive Attachment

 Insulation adhesive must be supplied by Duro-

Last, Inc. Refer to the adhesive’s product data sheet for application guidelines. Acceptable products:

o Duro-Grip o Duro-Grip Olybond o Duro-Grip Millenium Weather-Tite

Insta-Stik™.

o Duro-Grip CR-20.

 Subsequent layers of insulation and approved

cover boards may be attached with insulation adhesive.

 Maximum panel dimensions are 4 ft. x 4 ft.

TABLE 2. TYPICAL PHYSICAL PROPERTIES (FOAM CORE)

Compressive

Strength

Dimensional

Stability

Moisture Vapor

Transmission

Water

Absorption

Service

Temperature

ASTM D 1621 ASTM C 1289

ASTM D 2126

ASTM E 96

ASTM C 209 < 1% volume

Grade 2

Grade 3

2% linear change

(57.5 ng/Pa·s·m

-100° to 250° F

(-73° to 122° C)

20 psi

(138 kPa)

25 psi

(172 kPa)

(7 days)

< 1 perm

 The deck shall be dry and care must be taken

to apply the bitumen in sufficient quantity to totally cover the available deck surface.

 To ensure embedment, the board shall also be

“stepped in” at several points while the bitumen is still hot enough to allow positive attachment.

 Maximum panel dimensions are 4 ft. x 4 ft.

 Any roof membrane contaminated with bitumen

must be replaced.

Storage:

 Insulation must be protected from open flame

and kept dry at all times.

 Factory applied packaging is intended only for

protection during transit. Slit or remove the packaging to prevent accumulation of condensation.

 Store elevated (at least 3 inches) and

completely covered with a weatherproof covering such as a tarpaulin.

 Do not use panels which are wet or damaged.

 Refer to PIMA Technical Bulletin No. 109:

Storage and Handling Recommendations for Polyiso Roof Insulation for additional guidelines

(www.pima.org).

Limitations:

 Duro-Last, Inc. will not be responsible or liable

for any defects or problems related to building or roof design by others, to deficiencies in construction, to dangerous conditions on the job site, or to improper storage, handling or installation by others.

)

Hot Bitumen Attachment

 When using hot bitumen on concrete decks,

priming is necessary.

 Temperature of the bitumen shall be

approximately 50° F below the inter-ply hand mopping EVT.

Duro-Last, “World’s Best Roof” and Duro-Guard are registered marks owned by Duro-Last, Inc.

2of 2www.duro-l

Updated: 10/31

-248-02

2013