Installation Guide

TECHNICAL DATA SHEET
02.17.2017 | Page 8
Roppe Corporation | 1602 N. Union St. - Fostoria, OH 44830 | (800) 537 - 9527
RUBBER STAIR TREADS,
RISERS & STRINGERS
raised design
& specialty
riser and step nose. Cut several triangular
holes in the center of the template and
tape template to stringer substrate to
hold in place while trimming. Template
should be flat, flush and must not contain
any creases or ripples to ensure that
final template is accurate. Carefully trim
template to match step, riser and step
nose.
Place the stringer template over the
stringer material and mark cut lines
using suitable marker. Rough cut using a
suitable knife that is intended for resilient
flooring materials. All final adjustments
must be made prior to installing
adhesive. Stringer should be flush with
all step surfaces.
Apply adhesive according to instructions
for specific product in use. Be sure to
follow instructions based on substrate
porosity (porous or non-porous).
Replace trowels and/or applicators at
recommended intervals to maintain
proper trowel ridge and spread rate.
When installing into adhesive using
a wet-set method, avoid disrupting
material until adhesive has cured for
light foot traffic.
Carefully position stringer to ensure that
stringer material is flush with steps. Roll
material with a hand roller or equivalent
within 30 minutes of installation, crossing
in a perpendicular direction after initial
roll. Visually inspect installation to ensure
that material has not shifted and that
adhesive has not been squeezed out of
joints or compressed onto surface.
6. STAIR TREAD & RISER
PREPARATION
Prior to trimming and installation, confirm
material installation pattern per design
specifications or work order, especially
when installing profiled treads or butting
treads. If patterns need to be centered or
aligned, ensure that stair treads are long
enough to allow for trimming on either
side of tread.
Inspect all stair treads and risers prior
to trimming or installation to verify that
there are no visible defects, damages
or excessive shading variations. Some
products, colors and textures have
latent and acceptable color and shade
variations. If there are concerns regarding
shade or color variation, do not install
material and consult sales representative
and manufacturer’s technical staff.
Due to natural variances in stairwells and
steps, all Raised Design and Specialty
stair tread and riser installations are
intended to be scribed and trimmed
on-site to conform to each step, using
one of the following scribing methods.
Prior to trimming and installation,
ensure stair tread nose fits the substrate,
especially when installing round nose
treads or square nose treads that are not
adjustable, as nosing may not conform
to steps that are not designed for the
specific stair tread in use. Do not install
stair treads that do not conform to the
substrate or alter the interior stair tread
nose to conform to steps, as this could
result in premature wear and damage,
as well as void any and all expressed or
implied warranty.
Prior to trimming stair treads and risers,
ensure that specified stringer materials
are installed and that adhesive has cured
for light foot traffic to avoid stringer
adhesion issues. When scribing stair
treads and risers, start from the bottom
of the stairwell to ensure that stair treads
and risers are properly trimmed. Be sure
to protect stringer materials from sharp
edges, such as a sharp edge of a divider,
during stair tread and riser trimming and
installation.
THREE SIDE SCRIBE METHOD
Determine the center of the stairwell and
mark a center line on the riser portion of
each step. Determine the center of each
stair tread and mark a center line on the
back edge of the tread for alignment
during trimming and installation. When
necessary, rough cut stair treads to
within 1/2" - 2" of step dimensions to
make scribing and trimming easier.
Align the stair tread to the right side of
the step and set divider to the distance
between the center mark on the step
riser and the center mark on the stair
tread. While applying firm pressure to the
stringer material with divider, mark the
stair tread with the divider to determine
scribe line. If using a One-Piece Tread &
Riser, scribe the riser portion of the tread
as well. Use a suitable knife to trim stair
tread along scribe mark and create a
slight undercut to ease final installation.
Once the right side of the tread is scribed
and trimmed, reposition the stair tread
to align to the left side of the step. Reset
the divider to the distance between the
center mark on the step riser and the
center mark on the stair tread. Use divider
to scribe stair treads as before and trim
stair tread along scribe mark, creating a
slight undercut. Ensure that stair tread
fits step snugly against stringers without
over-compressing tread material.
To aid in scribing and trimming the
back edge of stair treads, a spacer (such
as a carpenters level, 1" x 2" wood or
equivalent) is required to set the depth of
the tread. Prior to cutting the back edge
of the stair tread, measure the depth of
the step and the thickness of the spacer.
Rough cut stair tread to be at least 1/4"
deeper than the step but no deeper than
the width of the spacer.
Once the back edge has been rough cut,
align stair tread to the back of the step
riser above. Insert the spacer between
the leading edge of the stair tread and
the step nose, ensuring that the spacer
and stair tread fit snugly against the
step. Set the divider to the exact width
of the spacer and scribe the back edge
of the stair tread to the step riser. Trim
the back edge stair tread along scribe
mark, creating a slight undercut to ease
installation. Ensure that all sides of
the stair tread fit snugly to step while
avoiding over-compressing material.
Once the initial step has been scribed
and trimmed, the riser should be
scribed and trimmed to accommodate
imperfections in the step stringers using
the Two Side Scribe Method.
TWO SIDE SCRIBE METHOD
Prior to trimming risers, ensure that the
stair tread below has been trimmed and
fits snugly on the step beneath the riser.
Use the previous center mark used when
trimming the adjourning stair treads as
the center of the stairwell, ensuring that
center mark is visible while trimming
risers. Determine the center of each riser
and mark a center line on the top of the
riser for alignment during trimming and