(Specifier Note: The purpose of this guide specification is to assist the specifier in correctly specifying premium roof underlayment products and their installation. . The specifier needs to edit these guide specifications to fit the needs of each specific project.
Contact a DuPontTM RoofLiner Product Representative to assist in appropriate product
selections. Throughout the guide specification, there are Specifier Notes to assist in the
editing of the file.
References have been made within the text of the specification to MasterFormat 2004
Section numbers and titles, specifier need to coordinate this numbers and titles with
sections included for the specific project. The design professional may elect to incorporate the information of this section within the roofing section as appropriate.
This guide is for applications using an enhanced roof underlayment under all types of
roofing materials identified by ICC-ES AC 48, Section 3.0, such as asphalt shingles, clay,
concrete, fiber cement or metal tiles, slates, wood shakes, standing seam metal sheets
and corrugated metal roofing. DuPont™ RoofLiner is a lightweight, premium synthetic
roofing underlayment made with high-performance DuPont™ Elvaloy® AC copolymer
and is engineered to provide superior tear resistance for increased durability as compared to 30-lb roofing felt. It is ideal for sloped roofs (2:12 and greater) on commercial
or residential, new or re-roofing applications.)
SECTION 07 30 10
ROOF UNDERLAYMENT
DuPont TM RoofLiner
PART 1 - GENERAL
1.1
A.
1.2
A.
SECTION INCLUDES
Roof underlayment (DuPont™ RoofLiner)
REFERENCES
ASTM International
1.
2.
3.
4.
5.
ASTM D 751; Standard Test Methods for Coated Fabrics.
ASTM D 4533; Standard Test Method for Trapezoid Tearing Strength of
Geotextiles.
ASTM D 4869; Standard Specification For Asphalt-Saturated Organic Felt
Underlayment Used In Steep Slope Roofing.
ASTM E108; Standard Test Methods for Fire Tests of Roof Coverings
ASTM G154; Standard Practice for Operating Fluorescent Light Apparatus
for UV Exposure of Nonmetallic Materials.
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Roof Underlayment
DuPont™ RoofLiner
B.
ICC Evaluation Service (ICC-ES)
1.
2.
3.
C.
TAPPI
1.
1.3
ICC-ES AC48 (Section 3.0); Acceptance Criteria for Roof Underlayment for
Use in Severe Climate Areas, Required Test Data.
ICC-ES AC48 (Section 4.4); Acceptance Criteria for Roof Underlayment for
Use in Severe Climate Areas, Water-ponding Test.
ICC-ES AC48 (Section 4.7); Acceptance Criteria for Roof Underlayment for
Use in Severe Climate Areas, Accelerated Aging.
Test Method T-410; Grams of Paper and Paperboard (Weight per Unit
Area)
SUBMITTALS
A.
Refer to Section [01 33 00 Submittal Procedures] [Insert section number and
title].
B.
Product Data: Submit manufacturer current technical literature.
C.
Samples: Minimum 8-1/2 inches by 11 inch.
D.
Quality Assurance Submittals
(Specifier Note: DELETE Design Data, Test Report submittal requirements when propriety
specification is used and can be held. MAINTAIN Design Data, Test Report submittal
requirement when other products may be submitted for substitution.)
1.
2.
E.
Closeout Submittals
1.
1.4
A.
Design Data, Test Reports: Provide manufacturer test reports indicating
product compliance with indicated requirements.
Manufacturer Instructions: Provide manufacturer’s written installation
instructions.
Refer to Section [01 78 00 Closeout Submittals] [Insert section number and
title].
QUALITY ASSURANCE
Installer Qualifications
1.
Installer shall have experience with installation of commercial roof
underlayments assemblies under similar conditions.
2.
Installation shall be in accordance with roof underlayment manufacturer’s
installation guidelines and recommendations.
Roof Underlayment
DuPont™ Roof Liner
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3.
B.
1.5
Source Limitations: Provide roof underlayment and accessory materials
produced by single manufacturer.
Exterior Fire-Test Exposure: ASTM E 108, Class A; for application and roof slopes
indicated, as determined by testing identical membrane roofing materials by a
qualified testing agency.
DELIVERY, STORAGE AND HANDLING
A.
Refer to Section [01 60 00 Product Requirements] [Insert section number and
title].
B.
Deliver roof underlayment in manufacturer’s original, unopened, undamaged
containers with identification labels intact.
C.
Store roof underlayment as recommended by weather barrier manufacturer.
1.6
A.
WARRANTY
Refer to Section [01 78 36 Warranties] [Insert section number and title].
(Specifier Note: Special warranty is subject to use of manufacturer’s recommended
installation methods. Click here for complete warranty information.)
B.
Special Warranty: Product shall conform to the “Pass” requirements for Waterponding test in accordance with Section 4.4 of ICC-ES AC48.
1.
Warranty Period: 30 years from purchase
PART 2 - PRODUCTS
(Specifier Note: Product information is proprietary to DuPont™ Building Innovations™. If
additional products are required for competitive procurement, contact DuPont™
Building Innovations™ for assistance.)
2.1
A.
2.2
A.
MANUFACTURER
DuPont Building Innovations; 4417 Lancaster Pike, Chestnut Run Plaza 728,
Wilmington, DE 19805; 1.800.448-9835; www.roofing.dupont.com.
ROOF UNDERLAYMENT
Premium Synthetic Underlayment: Synthetic underlayment made from
polypropylene, with bi-directional twisted tape throughout, which is coated on
both sides with a top coating containing DuPont™ Elvaloy® AC copolymer.
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Roof Underlayment
DuPont™ RoofLiner
1.
B.
Performance Characteristics
1.
2.
3.
4.
5.
6.
7.
8.
2.3
Basis-of-Design: DuPont™ RoofLiner.
Liquid Water Transmission: Pass, when tested in accordance with ICC-ES
AC48 (Section 4.4)
Basis Weight: Minimum 4.6 oz/yd2, when tested in accordance with TAPPI
Test Method T-410.
Breaking Strength (MD): 120 lbs., when tested in accordance with ASTM
D751.
Pliability: Pass, when tested in accordance with ICC-ES AC48 (Section 3.0).
Accelerated Aging: Pass, when tested in accordance with ICC-ES AC48
(Section 4.7).
Ultra Violet Exposure: Pass, when tested in accordance with ASTM G154.
Fire Rating: Class A, when tested in accordance with ASTM E108.
Tear Strength: MD 38 lbs. and CD 31 lbs. when tested in accordance with
ASTM D 4533.
ACCESSORIES
(Specifier Note: DELETE Temporary fasteners if underlayment is to be installed using only
permanent fasteners or fasteners used for attaching finish roofing. Coordinate
appropriate finish roofing fasteners with roofing section. )
A.
Temporary Fasteners: [5/8 inch, minimum, uncapped wire staples] [or] [3/8
inch, minimum capped staples]
B.
Permanent Fasteners: [Aluminum, stainless-steel, or hot-dip galvanized-steel wire
with low-profile capped heads or disc caps, 1-inch minimum diameter] [16gauge minimum cap-staples] and 3/4-inch minimum long.
PART 3 - EXECUTION
3.1
A.
3.2
A.
EXAMINATION
Verify substrate and surface conditions are in accordance with roof
underlayment manufacturer recommended tolerances prior to installation of
roof underlayment.
INSTALLATION
Install roof underlayment over roof sheathing, drip edges along eave edge and
under drip edges along rake edges in accordance with manufacturer
recommendations.
Roof Underlayment
DuPont™ Roof Liner
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B.
Line valleys with roof underlayment prior to overall roof installation.
(Specifier Note: DELETE one of two installation paragraphs below. Retain single-layer
roof underlayment installation for roof slopes greater than 4:12. Retain double-layer roof
underlayment on roof slopes between 2:12 and 4:12.)
C.
Single-Layer Roof Underlayment: Install roof underlayment horizontally in shingle
style fashion with 4-inch course overlaps and 6-inch end laps beginning along
eave edges. Offset end laps in successive courses by 6 feet.
D.
Double-Layer Roof Underlayment: Apply two layers of roof underlayment. Begin
with 26-inch undercourse strip parallel to eave edge and then cover with a full
width sheet. Install successive sheets horizontally in shingle style fashion with 26inch course overlaps and 6-inch end laps. Offset end laps in successive courses
by 6 feet.
E.
Attach roof underlayment to roof sheathing.
(Specifier Note: Temporary fastening is only acceptable under certain conditions, and
design professional needs to be clear on appropriate nature of temporary installation.
Temporary fastening may occur prior to installation of final roof covering)
1.
Temporary installation: Secure using roof underlayment manufacturer
recommend fasteners spaced 8-inches on center along course and end
laps, and a single row 8-inches on center in the field of sheets.
a.
b.
Install final roof covering within 24 hours of temporary underlayment
installation
Temporary installation conditions conform to the following:
1)
2)
3)
Roof Slope less than 9:12
Wind conditions: less than 10 mph
Precipitation (rain or snow) is not anticipated while
underlayment is installed using temporary installation methods.
(Specifier Note: SELECT second options in attachment paragraph below where roof is
subject to high wind speeds.)
2.
Permanent installation Secure using roof underlayment manufacturer
recommend fasteners spaced [8-inches] [4-inches] on center along
course and end laps, and [a single row] [two rows] 24-inches on center in
the field of sheets.
F.
Lap roof underlayment 8-inches onto walls.
G.
Lap ends of horizontal roof underlayment courses over valley sheet by 6-inches.
H.
At ridges and hips where ridge vents will not be applied, cross-lap roof
underlayment from one roof plane onto the other by 6-inches.
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Roof Underlayment
DuPont™ RoofLiner
END OF SECTION
DISCLAIMER:
DuPontBuilding InnovationsGuide Specifications have been written as an aid to the
professionally qualified Specifier and Design Professional. The use of this Guideline
Specification requires the sole professional judgment and expertise of the qualified
Specifier and Design Professional to adapt the information to the specific needs for the
Building Owner and the Project, to coordinate with their Construction Document
Process, and to meet all the applicable building codes, regulations and laws. DUPONT
EXPRESSLY DISCLAIMS ANY WARRANTY, EXPRESSED OR IMPLIED, INCLUDING THE
WARRANTY OF MERCHANTABILITY OR FITNESS FOR PARTICULAR PURPOSE OF THIS
PRODUCT FOR THE PROJECT.
Roof Underlayment
DuPont™ Roof Liner
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