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Apply wedi Joint Sealant and a strip
wedi Building Panel in any thickness
starting from 1/8” thick standard wedi
Building Panels. This strip’s cementitious
coating side will allow you to better set
small tile.
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Cut out for the sink using a jigsaw or handsaw. As needed, recess cuts
might be created with a utility knife or a router to accommodate recessed
sinks. Cutting the holes may proceed before or after installation of large
format, thin porcelain tile as indicated in step 5.
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Apply weight equally distributed across the tile until thinset mortar has
set.
Install the large, or small format tile, including thin veneer tile, or stone
to the wedi Building Panel surface and edges using a modified thinset.
Installation of Large Format Thin Porcelain Tile,
and Other Tile/Stone, Over Countertops
Installation Tips:
 wedi Building Panels starting with an panel thickness of 1 1/2“ (38.1 mm) can be used over
counters without additional plywood support. The wedi Building Panels may overhang
at the countertop edges by a maximum of 6” (152.4 mm) if overhang areas are tiled top,
front and bottom.
 Some large or irregular shaped countertops will require multiple panels. This makes
it necessary for the use of an edge leveling system to maintain a smooth transition
between the large format, thin porcelain tile. For timing and method of installation
refer to the edge leveling system manufacturer’s instructions.
 In areas where the countertop intersects with the backsplash or other vertical pro-
jections through the countertop, differential movement will occur. For these active
transitions, most manufacturers recommend the use of a color coordinated 100%
silicone caulk for its superior flexibility and adhesion, or when applicable a permanent
metal or plastic edge treatment piece can be used.
 Full coverage of bonding mortar is critical for the impact resistance of the installed
countertop. It has found that a high speed orbital sander with pad is the best way to
evacuate the air and collapse the ridges under the panel. The installation guidelines for
floors, including but not limited to, proper trowel and troweling technique (excluding
the walk-in method for embedding), should be followed for countertops.
Apply a continuous 1/2” (12.7 mm)
thick bead of wedi Joint Sealant over the
spacers of your countertop. Glue down
the wedi Building Panel in thickness of
1 1/2” (38.1 mm) to 2” (50.8 mm) after
you have cut it to size. Leave it recessed
behind the front of the counter so you
can apply a strip of wedi Building Panel
to the exposed foam edge as shown in
Step 2 and still finish flush. Apply some
weight equally on the surface for 15-20
minutes so that the wedi Joint Sealant
can set up properly under compression.
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