USG Durock, Installation Manual

Page: 6 / 16

15. The D
urock
Shower System
waterproofing application is
now complete. Before
water testing and setting
tile, allow a minimum of
24 hours to ensure both
proper curing of thin-set
mortar and waterproof
performance at all seams
and connections.
16.
Insert a water test plug
and fill the shower with
approximately 3" of water.
After 24 hours check for
leakage and remove the
plug. This confirms the
waterproofing is sound.
17.
You are now ready to apply
thin-set mortar to the shower
walls and floor and set tile.
1.
The
D
urock
™
Shower System
Grate Assembly is installed at
the same time as the floor tile.
Tip:
Remove the construction plug
from the grate tray by pushing up
from the inside, then apply a light
coating of petroleum jelly to the
plug’s edges to keep grout from
bonding to the plug’s perimeter
(this is especially important when
using urethane or epoxy grout
which bonds more aggressively).
2.
Install the construction
plug into the grate tray,
and snap the assembly into
the grate tray riser. Apply
thin-set mortar to both the
underside of the grate tray
and to the recessed area of
the drain assembly’s bonding
flange. Place the assembly
into the horizontal adjustment
ring, then place the grate
assembly into the recessed
area of the drain body.
Align the grate assembly with
the layout of the floor tile and
adjust vertically to ensure the
construction plug is even with,
or slightly below, the surface
of the surrounding tile.
Tip: During the grouting process,
expose the top surface of the
construction plug up to its outer
edges while keeping the grout joints
immediately surrounding the plug
as full as possible.
3.
After grouting the shower
floor, wait at least 24
hours before removing
the construction plug. To
remove the construction
plug after grouting, press
down firmly a few times
on the center of the plug
to create a separation line
between the perimeter and
the surrounding grout joints.
Insert a thin screw (drywall
screw or similar) into one
of the four start holes in
the construction plug and
thread the screw far enough
in so that the screw grips
the plug firmly, then use the
screw to pull the plug out.
Install the grate.
Note:
The construction plug
ensures that the grate tray remains
absolutely square and in perfect
form for subsequent installation
of the grate. Removing the
construction plug prematurely can
cause the grout to crack, creating
an improper fit to the grate.
For tile application, refer
to manufacturer of setting
material for specific
information related to type
of mortar, as well as to size
and type of trowel.
Grate Assembly
Construction Plug
Grate
Grate Tray
Grate Tray Riser
Horizontal
Adjustment Ring
Drain Body
with Integrated
Bonding Flange
PVC or ABS Bushing with
2" (5 cm) Coupling Socket
Drain Assembly and Grate Assembly
Shower Floor
Drain Assembly cont.
O-Ring
Grate Puller
For more detailed instructions visit durockshowersystem.com 5