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®
                                              DURO-GUARD  ISO HD Composite
            Installation:
                 Panels must be kept dry before, during and        TABLE 2. PHYSICAL PROPERTIES – COVER BOARD
                 after installation. Install only as much insulation   Compressive Strength ASTM D 1621   100 PSI
                 as can be covered the same day with                                           < .5 % linear change (7
                 completed roofing.                             Dimensional Stability  ASTM D 2126   days)
                 The use of multiple layers of insulation with   Water Absorption   ASTM C 209    < 1% volume
                 joints staggered a minimum of 6 inches
                 between layers is recommended to eliminate      Resistance to Mold   ASTM D 3273   Passed (10)
                 thermal bridging.                               Service Temperature           260° F (126° C) or less
                 Abut panel edges together and stagger joints of
                 adjacent panels.
                                                                  TABLE 3. PHYSICAL PROPERTIES – DURO-GUARD ISO III
                 Boards must be neatly fitted to roof deck and
                                                                                                          20 psi
                 around penetrations with no gaps greater than                    ASTM D 1621   Grade 2   (138 kPa)
                 ¼ inch.                                        Compressive Strength                      25 psi
                                                                                  ASTM C 1289   Grade 3
                 Refer to the appropriate Duro-Last roof system                                         (172 kPa)
                 specification and detail drawings for deck     Dimensional Stability  ASTM D 2126   2% linear change
                                                                                                    (7 days)
                 preparation and attachment requirements.
                                                                   Moisture Vapor   ASTM E 96       < 1 perm
                                                                                                            2
                 Precautions must be taken to ensure that new     Transmission                  (85.0 ng/Pa·s·m )
                 concrete decks have fully hydrated and do not    Water Absorption   ASTM C 209    < 1% volume
                 continue to release moisture.
                                                                 Service Temperature              -100° to 250° F
            Panel Attachment:                                                                     (-73° to 122° C)

                 Panels may be attached to the roof deck using
                 mechanical fasteners, insulation adhesive or         The deck shall be dry and care must be taken
                 hot bitumen. It is acceptable to use these           to apply the bitumen in sufficient quantity to
                 products in combination.                             totally cover the available deck surface.
             Mechanical Attachment                                    To ensure embedment, the board shall also be
                                                                      “stepped in” at several points while the bitumen
                 When installing multiple layers (which may          is still hot enough to allow positive attachment.
                 include insulation, cover boards and thermal
                 barriers) it is acceptable to mechanically secure      Maximum panel dimensions are 4 ft. x 4 ft.
                 through all layers.                                  Any roof membrane contaminated with bitumen
                 Use fasteners and plates supplied by or             must be replaced.
                 approved by Duro-Last, Inc.                     Storage:
             Adhesive Attachment
                                                                      Insulation must be protected from open flame
                 Insulation adhesive must be supplied by Duro-       and kept dry at all times.
                 Last, Inc. Refer to the adhesive’s product data      Factory applied packaging is intended only for
                 sheet for application guidelines. Acceptable         protection during transit. Slit or remove the
                 products:                                            packaging to prevent accumulation of
                            ®
                                      ™
                 o Duro-Grip  Insta-Stik .                            condensation.
                                    ®
                 o Duro-Grip Olybond .                                Store elevated (at least 3 inches) and
                                                 ®
                 o Duro-Grip Millenium Weather-Tite .                 completely covered with a weatherproof
                 o Duro-Grip CR-20.                                   covering such as a tarpaulin.
                 Subsequent layers of insulation and approved        Do not use panels which are wet or damaged.
                 cover boards may be attached with insulation         Refer to PIMA Technical Bulletin No. 109:
                 adhesive.                                            Storage and Handling Recommendations for
                 Maximum panel dimensions are 4 ft. x 4 ft.          Polyiso Roof Insulation for additional guidelines
                                                                      (www.pima.org).
             Hot Bitumen Attachment
                 When using hot bitumen on concrete decks,      Limitations:
                 priming is necessary.                                Duro-Last, Inc. will not be responsible or liable
                 Temperature of the bitumen shall be                 for any defects or problems related to building
                 approximately 50° F below the inter-ply hand         or roof design by others, to deficiencies in
                 mopping EVT.                                         construction, to dangerous conditions on the
                                                                      job site, or to improper storage, handling or
                                                                      installation by others.


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

                                   Duro-Last, “World’s Best Roof” and Duro-Guard are registered marks owned by Duro-Last, Inc.
                                                       Updated: 10/31/2013
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