Installation Guide

window and door trim
accessories installation
Installing Long Length Mantel
System Keystones
With the mantel already mounted to
the wall, pencil a centerline on the
top and bottom of both the mantel
and keystone.
Using the drill jig provided with the
keystone, place on the mantel’s top
edge and align slotted holes over the
penciled centerline on the mantel.
Drill 1/4˝ holes through hole pattern
of drill jig. Repeat second set of
holes on bottom edge of mantel.
(Fig.1)
Install the keystone clips making sure
end “A” is inserted first, then snap in
end “B”.
Slide clip back 1/16˝ to ensure
clamping legs are fully locked into
place. (Fig.2)
Position the keystone using the
centerline as the guide and snap it
into place starting at one end of the
top of the keystone. You may need to
trim the sides of the keystone when
using dentil cover strips. (Fig.3)
NOTE: When installing keystone over
two-piece mantel, make sure mantel
pieces are cut to equal lengths. Use
the cut ends to form the centerline
for clips and keystone. Caulk bottom
ends then install.
Pencil
Line
Pencil
Line
A
A
B
B
Fig.1
Fig. 2
Fig. 3
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