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ICC-ES Evaluation Report
ESR-3731
Reissued November 2018
This report is subject to renewal November 2019.
www.icc-es.org | [phone] | [phone] A Subsidiary of the International Code Council
®
DIVISION: 07 00 00—THERMAL AND MOISTURE
PROTECTION
Section: 07 65 00—Flexible Flashing
Section: 07 72 00—Roof Accessories
REPORT HOLDER:
NU-STEP LLC
EVALUATION SUBJECT:
NU-STEP POLYMER STEP FLASHING
1.0 EVALUATION SCOPE
Compliance with the following codes:
 2018, 2015, 2012 and 2009 International Building
Code
®
(IBC)
 2018, 2015, 2012 and 2009 International Residential
Code
®
(IRC)
Properties evaluated:
 Weather resistance
 Durability
2.0 USES
Nu-Step Step Flashing is a polymer step flashing used as
a mechanically attached flashing at wall and roof
intersections to prevent moisture from penetrating the roof
under IBC Section 1503.2 and IRC Section R903.2.
3.0 DESCRIPTION
Nu-Step Step Flashing is made of a proprietary polymer
and is approximately 8 inches long by 8 inches wide by
0.033 inches thick.
4.0 INSTALLATION
Nu-Step Step Flashing installation must be installed in
accordance with the manufacturer’s published installation
instructions, the applicable code and this evaluation report.
In the event of a conflict between this report and the
manufacturer’s published installation instructions, this
report governs.
Nu-Step Step Flashing installation must be coordinated
with installation of roof shingles. Roofing underlayment,
roof shingles, drainage material and gutters must be
installed in accordance with the applicable code and the
roof covering manufacturer’s installation instructions and/or
design professional’s specifications and instructions.
Nu-Step Step Flashing must be bent and creased at
90 degrees as shown in Figure 1. Each piece of step
flashing is installed under each course of shingles with a
minimum 2-inch (51 mm) overlap to the flashing below.
Each piece of Nu-Step Step Flashing is fastened through
the shingle and step flashing into the roof deck. The
adjacent side of the step flashing is covered by the
siding or counter flashing on any vertical protrusion. See
Figure 2.
5.0 CONDITIONS OF USE
The Nu-Step Step Flashing described in this report
complies with, or is a suitable alternative to what is
specified in, those codes listed in Section 1.0 of this report,
subject to the following conditions:
5.1 Nu-Step Step Flashing must be installed in
accordance with the manufacturer’s published
installation instructions, the applicable code and this
evaluation report. In the event of a conflict between
this report and the manufacturer’s published
installation instructions, this report governs.
5.2 The flashing is limited to use on solid sheathed roof
decks.
6.0 EVIDENCE SUBMITTED
6.1 Data in accordance with Sections 4.3 and 4.4 of the
ICC-ES Acceptance Criteria for Attic Vents (AC132),
dated February 2010 (editorially revised January
2018).
6.2 Manufacturer’s installation instructions.
6.3 Quality documentation in accordance with the ICC-ES
Acceptance Criteria for Quality Documentation
(AC10), dated June 2014.
7.0 IDENTIFICATION
7.1 Each Nu-Step Step Flashing bundle is labeled with
the product name (Nu-Step Step Flashing), the report
holder’s name (Nu-Step) and the evaluation report
number (ESR-3731).
7.2 The report holder’s contact information is the
following:
NU-STEP LLC
1700 DOVER STREET
LAKEWOOD, COLORADO 80215
[phone]
www.nu-step.net