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Surface Preparation
Tip:
Use a circular saw with a
carbide-tipped blade for large
cutouts or a drill with a masonry
bit for small holes.
Save time by pre-cutting all panels then fastening.
1
With scoring tool or utility knife and straight-edge,
score through fiberglass mesh on one side.
2
Snap board at score line.
3
Cut mesh on other side and snap back. Cut through
mesh on both sides.
4
Knock out piece with hammer and smooth with file.
Scoring & Cutting Panels
1
Using a 1/4" x 1/4" x 1/4" square-notch trowel, apply
a leveling bed of polymer-modified thin-set mortar
such as FlexBond
®
to the subfloor.
2
Place WonderBoard Lite panels perpendicular to the
plywood sheets, leaving a 1/8" gap between each
panel.
3
Stagger panel joints to eliminate a continuous gap
line across the floor.
4
Fasten WonderBoard Lite every 6"-8" around all
edges using 1-1/4" cement backerboard screws or
1-1/2" galvanized roofing nails. Around perimeter
of each board, position fasteners within 1/2" -2" of
edges and throughout the panels.
5
Fill all joints between panels with thin-set mortar
then embed 2" wide fiberglass mesh tape and
smooth. Leave a 1/8"-1/4" gap around perimeter of
wall for expansion.
Installation for Ceramic Tile
or Natural Stone
Floor or Countertop Installation:
1/4" or 7/16" WonderBoard Lite
Score then snap
WonderBoard Lite
Adhere to subfloor Stagger surface and
panel joints