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DURO-GUARD EPS TYPES II, VIII AND IX

Installation: Storage:
 Duro-Guard EPS panels and Duro-Last  Insulation must be protected from open flame
membrane must never be in direct contact. and kept dry at all times.
Refer to the appropriate Duro-Last specification  Factory applied packaging is intended only for
for slip sheet and cover board requirements. protection during transit. Slit or remove the
 Panels must be kept dry before, during and packaging to prevent accumulation of
after installation. Install only as much insulation condensation.
as can be covered the same day with
completed roofing. TABLE 2. TYPICAL THERMAL VALUES
 The use of multiple layers of insulation with Thickness* R-Value
joints staggered a minimum of 6 inches Inches mm Type II Type VIII Type IX
between layers is recommended to eliminate 1.00 25 4.5 4.2 4.7
thermal bridging. 1.50 38 6.7 6.3 7.0
2.00 51 9.0 8.4 9.4
 Abut panel edges together and stagger joints of 2.50 64 11.2 10.5 11.7
adjacent panels. 3.00 76 13.5 12.6 14.1
3.50 89 15.7 14.7 16.4
 Boards must be neatly fitted to roof deck and 4.00 102 17.0 16.8 18.8
around penetrations with no gaps greater than 4.50 114 20.2 18.9 21.1
¼ inch. 5.00 127 22.5 21.0 23.5
5.50 140 24.7 23.1 25.8
 Refer to the appropriate Duro-Last roof system 6.00 152 27.0 25.2 28.2
specification and detail drawings for deck * Contact Duro-Last for additional thickness options.
preparation and attachment requirements.
 Precautions must be taken to ensure that new TABLE 3. TYPICAL PHYSICAL PROPERTIES
concrete decks have fully hydrated and do not
Test
continue to release moisture. Property Method Type II Type Type IX
VIII
Density ASTM
Panel Attachment: (nominal) C 303 1.50 pcf 1.25 pcf 2.00 pcf
R-Value
 Panels may be attached to the roof deck using (per inch) ASTM
mechanical fasteners or insulation adhesive. It @25°F C 518 4.76 4.55 5.00
or
is acceptable to use these products in @40°F C 177 4.55 4.25 4.76
combination. @75°F 4.17 3.92 4.35
Compressive
Mechanical Attachment Strength ASTM 15 – 21 13 – 18 25 – 33
(10%
 When installing multiple layers (which may deformation) D 1621 psi psi psi
include insulation, cover boards and thermal ASTM
barriers) it is acceptable to mechanically secure Flexural Strength C 203 ≥ 35 psi ≥ 30 psi ≥ 50 psi
through all layers. Dimensional ASTM
Stability D 2126 ≤ 2.0% ≤ 2.0%
 Only use fasteners and plates supplied by, or
approved by, Duro-Last, Inc. Water Vapor ASTM E 96 ≤ 3.5 perm ≤ 2.0 perm
Permeance
Adhesive Attachment Water Absorption ASTM ≤ 3.0% ≤ 2.0%
o Insulation adhesive must be supplied by C 272
Duro-Last, Inc. Refer to the adhesive’s Flame Spread ASTM E 84 20 20
product data sheet for application guidelines. Smoke ASTM E 84 150 - 300 150 - 300
Acceptable products: Developed
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o Duro-Grip Insta-Stik .
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o Duro-Grip Olybond .  Store elevated (at least 3 inches) and
completely covered with a weatherproof
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o Duro-Grip Millenium Weather-Tite . covering such as a tarpaulin.
o Duro-Grip CR-20.  Do not use panels which are wet or damaged.
 Subsequent layers of insulation and approved
cover boards may also be attached with Limitations:
insulation adhesive.
 Duro-Last, Inc. will not be responsible or liable
 Maximum panel dimensions are 4 ft. x 4 ft. 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.
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Duro-Last, “World’s Best Roof”, Duro-Grip, Duro-Bond and Duro-Guard are registered marks owned by Duro-Last, Inc.
Created: 01/17/2012 Revised: 03/19/2013, 11/04/2013, 03/04/2014