Installation Guide

1 Measure the width
of the window opening
from jamb to jamb.
2 Measure the depth of
the window opening in
three places (each end
and the center). Note
the largest of these
dimensions.
3 Mark the width on
the top of the sill.
4 Cut the sill to the
width of the opening.
5 Mark the depth (the
largest dimension from
step 2) on the back of
the sill, starting from
the lip of the sill.
6 Using a saw, rip the
sill to the proper depth.
Sand any rough edges.
7 Insert the sill in the
window opening to
make sure it fits.
8 Apply 1-inch balls
of polyurethane
construction adhesive 3
to 6 inches from each
end and 12 inches on
center of the sill area.
9 Apply a bead of
caulk to the back edge
of the sill.
10 Insert the sill at a
slight angle making
contact with the
window, then pivot the
sill down in place.
11 Apply a bead of
caulk in the joints
between the sill and
the window, and the
sill and the drywall.
Smooth the caulk
with a wet finger.
Occasionally, the
butt-cut ends will have
voids. These voids can
be filled with an all-
purpose adhesive caulk.
Installation Instructions
Make sure you read and understand these instructions
before beginning your installation.
Tools and Materials
Tape measure Square
Pencil Sandpaper
Jigsaw or small circular saw
Polyurethane construction adhesive
Weatherproof paintable caulk
Always wear safety eyewear when operating power tools.
Care & Cleaning
Sill-Rite sills are easy to clean and require little maintenance.
Make sure any cleaning product you use is safe for use on vinyl
products. Test the cleaning product on an inconspicuous location
of the sill, such as an underneath, out of site location. For tough
scuffs and stains, lightly sand with 300 grit sandpaper. As with
testing cleaning products, test on an inconspicuous location.
Painting
Sill-Rite sills are pre-finished and do not require painting, but
may be painted to achieve a custom color. For best results,
prepare the surface by sanding lightly with fine sandpaper. Clean
the sill thoroughly and apply an acrylic latex primer. Finish with
a 100% acrylic latex paint.
1
2
3
4
5
6
9
www.sill-rite.com
1-800-503-2334
8