USG Durock Tile Membrane - Manual (Page 4)

4
Preparation Installation of
Tile Membrane
1. Ensure that substrate is clean,
even, flat, designed to support
ceramic tile, and properly
installed according to manu-
facturers’ specifications.
2. Substrate must be free
of sealers, waxes, bond
breakers, dust and dirt.
3. If D
urock
tile membrane is
installed directly over a wood-
based subfloor, ensure that
all fasteners are seated cor-
rectly and there are no uneven
joints. Sand or fill if necessary.
1. Precut the full width of mem-
brane to provide a tight fit to
the perimeter of the room.
2. Spread adhesive over an area
the full width of the sheet and
as far as can be comfortably
reached.
– For D
urock
tile membrane
adhesive, use a 3/89-nap
paint roller or a 1/169 U-notch
trowel.
– For Type 1 organic adhesive,
use a 1/169 U-notch trowel.
– For latex-modified thin-set
mortar, use a 1/89 U-notch
trowel. Roll or trowel adhesive
in parallel rows across the
width or length to avoid trap-
ping air under the membrane.
For installations over non-
porous surfaces, such as
vinyl, laminate and existing
tile—allow adhesive to air-dry,
becoming translucent and
developing tack, before
installing D
urock
tile
membrane. Time will vary
depending on temperature,
humidity and substrate type;
however, a minimum of 15
minutes should be allowed.
3. Install membrane with
cementitious side out. Embed
into adhesive, using the flat
edge of the trowel or with a
non-segmented hand roller.
Start in the center of the