USG Durock Tile Membrane - Manual (Page 5)

4 5
sheet and work out towards
the edges, removing all air
bubbles. Overlap each row
29, making sure that a
sufficient amount of
adhesive is applied to the
joint area.
For wall applications, begin
from the lowest point and work
toward the highest point of
coverage so that all horizontal
membrane seams are lapped
in a shingle-like manner.
4. Areas unable to receive verti-
cal flashing, such as pipe pen-
etrations and bathroom tubs,
should be sealed using a good
quality silicone sealant. Run a
continuous bead and tool the
material to provide continuity
to the membrane.
5. Allow membrane adhesive to
cure sufficiently (minimum
2 hours for D
urock
tile mem-
brane adhesive, minimum
4 hours for Type 1 organic
adhesive or 8 hours for latex-
modified thin-set mortar).
6. Install tiles on cementitious
(dark) side of membrane with
ANSI A118.4 latex-modified
Portland cement mortar or ANSI
A136.1 Type 1 organic adhe-
sive. Determine correct
trowel size based on tile mate-
rial and size to achieve at least
95% coverage of the average
tile contact area.
7. After tile installation, do not
walk on floor for at least 48
hours unless walking boards
or plywood sheets are used, as
per current TCNA Handbook for
Ceramic Tile Installation.
8. Select, prepare and install ANSI
A118.7 latex-modified or ANSI
A118.8 modified epoxy emul-
sion grout per grout manufac-
turer recommendations.