Installation Guide

5. Install Trim Pieces
6. Install Corner Blocks
7. Finish with Silicone
Apply silicone to the joints
where sills and jambs meet the
window. Next, apply a bead of
silicone on the wall panel ½"
from the edge all around the
window. Apply adhesive to sill,
jambs and header. If any piece
is out of square, add more
adhesive to compensate and
install each piece.
Install each corner block by
applying adhesive into the
hollow back and placing the
corner block in each corner of
the window sill frame. To avoid
a messy cleanup, be careful to
not overll.
To nish up the installation, use
color matching silicone and
seal both the entire outside
perimeter as well as all inside
seams of your window trim kit.
3. Cut Trim Pieces
4. Dry-Fit
Cut the trim pieces according
to the depth and length
measurements. Remember to
cut o an additional ½" from
the length measurements to
allow room for the corner
blocks.
Dry-t each piece and check for
plumb and level.
NOTE: The Window Sill Frame
Trim can easily be cut down
to size to precisely frame the
window in your bath surround.
Before installing the window
sill frame, make sure to
waterproof the window sill with
a waterproof membrane, such
as RedGard.
1. Measure Depth
2. Measure Length
For each piece of trim, measure
from the window sash to the
outside of the wall panel in 3
locations —left, center & right.
Measure both the inside and
outside length of the sill, jambs
and header. For each piece, use
the shortest measurement of
the two and subtract ½" to al-
low room for the corner blocks.
Window Trim Instructions
V.4 - 07/2021