Duro-Last EPS Types II and VIII User Manual

DURO-GUARD® EPS TYPES II AND VIII

FLAT AND TAPERED PANELS

Description:

Duro-Guard insulations consisting of a superior closed-cell, lightweight and resilient expanded polystyrene (EPS). They meet or exceed the requirements of ASTM C 578, Standard Specification for Rigid, Cellular Polystyrene Thermal Insulation.

• Available in both flat and tapered panels in order to meet thermal insulation needs as well as provide slope for proper roof drainage.

• Provides long-term thermal insulation value.

• Does not contain CFCs or HCFCs.

• Superior moisture resistance.

• 100% recyclable.

• Available in two densities per ASTM C 578:

o Type II, 1.50 pcf. o Type VIII, 1.25 pcf.

• Refer to Table 3 for physical properties.

Recommended Uses:

• Mechanically attached Duro-Last roof systems.

• Adhered/Fully Bonded Duro-Last roof systems.

• Duro-Bond

• Metal retrofit roof systems.

EPS Type II and Type VIII are premium

roof systems.

Figure 1. Duro-Guard EPS Types II and VIII Flat

Tapered Panels:

• Typical sizes:

o 4 ft. x 4 ft. (1220 mm x 1220 mm). o 4 ft. x 8 ft. (1220 mm x 2440 mm). o Thicknesses: 0 to 40 inch (0 to 1016 mm).

• Precut cricket and saddle systems are available.

• Taper designs and shop drawings are

available.

• Custom sizes are available.

Underwriters Laboratories Inc.:

• Refer to Duro-Last’s UL Listings (TGFU.R10128) for assembly details (www.ul.com).

Factory Mutual Global:

• Refer to FM Approval’s RoofNav for details on FM Approved systems (www.roofnav.com).

Flat Panels:

• Typical sizes:

o 4 ft. x 4 ft. (1220 mm x 1220 mm). o 4 ft. x 8 ft. (1220 mm x 2440 mm). o Thickness: Up to 40 inch (1016 mm).

o Custom cut “flute filler” for metal roofs is available.

* Contact Duro-Last for additional slope options.

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: 11/4/2013

Figure 2. Duro-Guard EPS Types II and VIII Taper

TABLE 1. TYPICAL TAPER PANEL DIMENSIONS

ID SLOPE* Thickness A1 ⅛” per 12” 1% A2 ⅛” per 12” 1% A3 ⅛” per 12” 1% A4 ⅛” per 12” 1% C1 ¼” per 12” 2% C2 ¼” per 12” 2% C3 ¼” per 12” 2% C4 ¼” per 12” 2% E1 ½” per 12” 4% E2 ½” per 12” 4% E3 ½” per 12” 4% E4 ½” per 12” 4%

EPS panels can be formed

up to 40” thick.

The starting thickness of

the tapered panels can be

custom ordered based on

project requirements.

/4/

ast.co

800

DURO-GUARD® EPS TYPES II AND VIII

Installation:

• Duro-Guard EPS panels and Duro-Last membrane must never be in direct contact. Refer to the appropriate Duro-Last specification for slip sheet and cover board requirements.

• 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.

• Butt 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 or insulation adhesive. 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 and plates supplied by or approved by Duro-Last, Inc.

Adhesive Attachment

o 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 o Duro-Grip o Duro-Grip

Insta-Stik™.

Olybond®.

Millenium Weather-Tite®.

CR-20.

• Subsequent layers of insulation and approved cover boards may also be attached with insulation adhesive.

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

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.

TABLE 2. TYPICAL THERMAL VALUES

THICKNESS* R-Value

inches mm TYPE II TYPE VIII

1.00 25 4.5 4.2

1.50 38 6.7 6.3

2.00 51 9.0 8.4

2.50 64 11.2 10.5

3.00 76 13.5 12.6

3.50 89 15.7 14.7

4.00 102 17.0 16.8

4.50 114 20.2 18.9

5.00 127 22.5 21

5.50 140 24.7 23.1

6.00 152 27.0 25.2

* Contact Duro-Last for additional thickness options.

TABLE 3. TYPICAL PHYSICAL PROPERTIES

Property Test Method Type II

Density

(nominal)

R-Value

(per inch)

@25°F @40°F @75°F

Compressive

Strength

(10% deformation)

Flexural Strength ASTM C 203 ≥ 35 psi

Dimensional

Stability

Water Vapor

Permeance

Water Absorption ASTM C 272 ≤ 3.0%

Flame Spread ASTM E 84 20

Smoke Developed ASTM E 84 150 - 300

ASTM C 303 1.50 pcf

ASTM C 518

C 177

ASTM

D 1621

ASTM

D 2126

ASTM E 96 ≤ 3.5 perm

4.76

4.55

4.17

15 – 21

psi

Type

VIII

1.25 pcf

4.55

4.25

3.92

13 – 18

psi

≥ 30 psi

≤ 2.0%

• Store elevated (at least 3”) and completely covered with a weatherproof covering such as a tarpaulin.

• Do not use panels which are wet or damaged.

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.

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

2of 2www.duro-l

Updated: 11

-248-02

2013