3-Panel Tub Kit
Install Instructions
For missing items do not return to store.
Please call 877-941-3662
(Monday – Friday 8:00 a.m. – 5:00 p.m MT)
V.3 06/2021
3-wall Tub Surround Instructions
Elite Series
Tub Model: FTSK60326031
G
D
F
I
B
C
Item Description Qty
A Back wall panel 1
B Side wall panel 2
C Left wall front mitered trim 1
D Left wall top mitered trim 1
E Right wall front mitered trim 1
F Right wall top mitered trim 1
G Back wall top trim 1
I Corner shelf with bracket 1
J Inside corner reinforcement 2
A
J
B
E
Please inspect packages for damage or missing pieces, and read instructions carefully prior to
installation. All FlexStone products come with a protective masking covering the image side of
the material. If you have any questions or issues, please call our customer suppport
Monday – Friday 8:00 a.m. – 5:00 p.m. MT at 877–941–3662
Visit http://FlexstoneProducts.com/installation to access a walkthrough video and other useful installation information.
V.3 06/2021
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Required Tools
Helpful Tools
Installation Kit
Your tub surround kit includes eight cartridges of adhesive and two
cartridges of color-tinted 100% silicone. Refer to section 2B of these
instructions for adhesive usage guidelines.
x 8
Construction
Adhesive
x 2
100% Silicone
Before Starting
Consult your local building codes with questions on installation compliance standards.
!
1. The FlexStone wall system is designed to be installed over a solid substrate such as green board, cement board, or other water resistant backers. Substrate should be clean, dry, and free of dust or loose
paint. Unless using our Remodel Trim Kit, any existing surround material should be removed.
2. The Remodel Trim Kit (sold separately) allows FlexStone to be used over existing tile. Tile should be
in good shape, and wall surfaces should be at (i.e. remove any accessories that would interfere with the
FlexStone panels.) The 4 pieces of 96" length would replace Items C, D, E, F, and G. Follow instructions
included with Remodel Trim Kit.
3. If installing a new bathtub prior to FlexStone installation, follow the manufacturer’s instructions, and
install the tub or base level and square to walls.
4. Turn o the water supply and complete any plumbing modications prior to installing your FlexStone
surround. Leave plumbing handles o until surround is installed. Plan the placement of the shower head
such that it is either above the height of the wall panels or at least 2" below the top of the wall panels.
This will keep the trim moldings from interfering with the pipe and escutcheon plate.
Building and plumbing codes may vary by location, and FlexStone Bath Systems is not
responsible for code compliance standards for your project.
5. Review Section 6 and decide how the vertical trim moldings will be installed, either outside the
shower base, or on top of the base threshold. This will impact the width of the side wall panels in
Section 3.
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Install Instructions
1. Installation of Inside Corner Reinforcements (J)
A. Flashing Tape Corner Reinforcements go behind the
panels in the back vertical corners for added leak protection.
This tape has been cut to length, matching the height of the
panels of your kit.
B. Apply a bead of adhesive onto both walls about 3/4 inch
away from the corner. Fold the ashing tape at the center
crease with the print side together, then press the tape into
the corner using a taping or putty type blade. Using the same
blade, atten out the tape to create a at, smooth inside corner. Wipe away any excess adhesive.
2. Installation of Back Wall Panel (A)
NOTE: It is not necessary to cut the top edges of panels to be level, as
they will be covered by trim moldings.
L1
R1
A. The back panel must be t to both the left and right corners,
and to the tub or shower base. Keep in mind that walls may
not be square or plumb, so you will want to measure width of
the alcove at both the bottom and top of the alcove prior to
trimming panel. (See TIP on right and below for a technique
for achieving good fit measurements.) Trim the panel to
size with a utility knife, jigsaw, or power plane and dry t
until a tight t is achieved.
TIP: Draw a vertical plumb line directly on the middle of the
sheetrock from top to bottom of wall. Now draw a horizontal
level line crossing the plumb line about halfway up the wall.
Record measurements left from the vertical line to corner at top,
middle and bottom (L1, L2, L3), then right from the vertical line to
corner (R1, R2, R3.) Now record measurements down from the
horizontal line to the tub (D1, D2, D3.) Transfer these measurements to your back wall panel (A). These 9 measurements will
account for out of plumb walls AND out of level tubs!
B. When satised with the t, peel protective masking back
from the edges of the panel (approx. 4") and clean burs from any
rough edges. Apply adhesive in lines or dollops to the back of
the panel in a pattern every 4 to 6 inches. Use approximately
one 10oz tube per 12 square feet following the adhesive
directions on the tube. Push the panel in place, lightly
pounding to achieve good bond.
Vertical Plumb Line
L2
R2
D1 D2 D3
L3
R3
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Adhesive Usage Guidlines:
• 3 tubes for back panel
!
• 1-2 tubes for each side panel
• 1-2 tubes for corner reinforcements, trim, and corner shelf.
3. Installation of Wet/Plumbing Wall Panel (B)
A . Hold side panel as close to plumbing wall as possible.
Scribe and trim the inside edge and bottom edge against
the shower base for best t before measuring, marking, and
cutting holes for plumbing xtures. The depth of the side
wall panels can also be trimmed down to t the opening or
your shower base, although how you decide to install verti-
cal trims C and E will inuence the width sizing of side wall
panels (see Section 4.)
NOTE: You will be able to ne tune your panel to a more accurate
t after the holes are cut and your panel can be rmly pushed into
the corner.
B. For each hole to be cut, measure the vertical distance be-
tween the center of the plumbing xture and the shower base.
Measure the horizontal distance between the center of the
xture and the installed back wall panel. Mark the center of the
xtures on the face of the panel.
Inside Wall
C. Using a drill, make a small pilot hole in marked locations.
Using a jigsaw, hole saw, or paddle bit cut out each hole in the
panel to the appropriate size for the particular pipe or xture.
Make each hole only as large as necessary for access to the
plumbing. Cover plates only cover so much!
D. With holes drilled so the panel now ts over the plumbing,
you can ne tune the t of the panel into the back corner and
against the shower base from step 3.A.
E. Prior to adhering the plumbing wall panel, seal the back
panel A to the corner reinforcement using a small bead of Performance Pro 100% Silicone.
F. Follow Step 2.B and adhere the side panel, but also form a
bead of adhesive on the back around each plumbing hole.
4. Installation of Opposite Side Wall Panel (B)
A . Use same procedures as in steps 3.A-3.F except that no
holes will be drilled in this panel. Dry t rst, and then apply
silicone to seal the corner, and adhesive as you did on previous side panel.
Shower Base
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5. Installation of Back Wall Top Trim (G)
NOTE: Trim moldings are shaped like an "L", and the long leg is
designed to overlap panels, with the short leg returning back to
the sheetrock and hiding the panel edge. Be sure to peel protective
masking back from the edges of the panels before adhering the trim
moldings.
A. Note the height of the shower head. Decide if top trims
will be installed above or below shower head/escutcheon,
keeping in mind that trims can overlap panels from ½" to
2-1/2". Mark a level line at desired height of the top of the
trim on the back wall (above the back wall panel).j
B. Measure the distance from plumbing wall to opposite
wall (sheetrock to sheetrock, NOT FlexStone to FlexStone).
Cut item (G) to this measurement, then cut a notch ¼" wide in
both ends. This will enable the trim to overlap the back panel
and t over the end panels eliminating any large gaps or holes
in the corners.
C. Dry t this trim piece and make sure it ts properly in a
level position. Peel away protective masking from the trim,
apply adhesive to the back of the trim molding, and adhere it
over the back wall panel. Secure the trim piece in place while
the adhesive cures using paint-safe masking tape.
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6. Installation of Side Wall Trims (C,D,E,F)
Note: Vertical trim moldings are designed to be installed just outside
the tub, running down to the oor, and contour cut to match the tub
front shape. Optionally, trims can be cut short to rest on top of the
tub.
A. Place horizontal left wall top mitered trim (Item D) in
place, push into the corner against back wall trim piece, then
level it. Mark a level line on the wall on the top side of the
molding near the outer end. Set aside this trim piece.
B. Measure from the oor to the level mark made in 6.A to
determine the length needed for the vertical trim piece (Item
C). Cut vertical trim piece (C) to this length, but do not cut
from the pre-mitered end!
C. Fit vertical trim piece (C) over panel and plumb using a
level. If contour cutting this molding to match the tub shape,
do so now. You can scribe the contour with a compass, or by
hand, and cut with a jig saw or utility knife. For tub installations, the back side of the molding will not be supported
by panel material in the contour cut region outside the tub.
Use a piece of cuto scrap as a ller behind this area of the
molding. Peel away protective masking from the trim, apply
adhesive and adhere molding to panel. Secure with masking
tape as in Step 5.C.
Vertical trims installed to top of tub
X
D. Measure horizontal distance from back wall molding
piece to the tip of miter on the vertical molding. Cut the
horizontal top trim molding (Item D) to this dimension by
cutting o the end opposite the miter. Be sure not to cut
the mitered end.
E. Dry t the molding (D) in place for a tight t. Peel away
protective masking from the trim, apply adhesive on the
backside of the molding and adhere to the wall as before.
Make any minor adjustments necessary to ensure that the
mitered end makes a tight joint.
F. Repeat 6.A-6.E for the opposite wall trims (E, F).
X
Contour cutting the trim molding to match
the tub shape gives a professional look
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Vertical trim installed outside tub,
and contour cut to match tub shape
V.3 06/2021
8. Installation of Corner Shelf (I)
NOTE: Corner shelf includes a folding-triangle metal bracket with
screw holes which is designed to mount directly to the FlexStone
wall panels. Be sure to peel away protective masking from the in-
stallation area before securing the bracket.
A. Position corner shelf bracket in desired corner at desired
height. Use a level to mark level lines in pencil. Adjust the
alignment to include a slight forward slope for water runo.
B. Using drywall screws or other coarse-thread screws, fasten
each side of the bracket through the FlexStone panels and the
sheetrock.
C. Fold bracket and complete triangle by bending the tab
over to secure bracket. Dry t the corner shelf material over
the bracket. If corner is out of square, trim one side of shelf to
achieve a tight t.
D. Peel back protective masking from edges of shelf, apply
adhesive to top and bottom of bracket and place FlexStone
material over bracket like a clamshell. Clamp until dry
(24 hours).
9. Sealing with Silicone
A. If you desire to paint the walls now or in the future, use
paintable latex caulk where trim moldings meet sheetrock. Use
wet nger or caulk tool to shape the latex caulk to a nice nish.
B. Using denatured alcohol, clean and prime all joints in the
surround, including vertical and horizontal joints where panel
meets tub, panel meets panel, or trim meets panel. Clean any
oils, greases, or adhesive residues from these joints.
C. Seal all joints in your surround with Performance Pro 100%
silicone. Our installation kit has color-matched translucent silicone, tinted to complement your selected FlexStone color. Ap-
ply a ne bead of silicone to all joints. Use wet nger or caulk
tool to shape the silicone to a nice nish. Follow any directions
on sealant tube.
PLEASE WAIT 24 HOURS BEFORE INSTALLING FINISH
PLUMBING OR USING YOUR NEW TUB/SHOWER SURROUND.
REMOVE REMAINING PROTECTIVE MASKING PRIOR TO USE.
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V.3 06/2021
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