In the overhang are roof rafters or floor joists to
which the cables are anchored. The cables run
through the hollow mullions separating the windows
in the unit, and the cables are finally anchored to the
threaded pins which protrude through the bottom of
the seat board on the window.
The washer and nut are applied to the threaded pin.
Each nut is tightened until the window unit is level
and plumb. Once the window is level, the temporary
bracing can be removed.The cable support system
can be adjusted periodically to compensate for
changes caused by temperature, humidity, or 
settling of the wall. 
For installations where there is no overhang, refer to
the instructions to add a roof. The cable system can
be substituted for the plumber's tape. The cable
anchor is bolted
to the stud in the
wall under the
roof, and the
cable and pins
are installed the
same way. 
Remember,
because of the
angle of the cable,
stress is placed at
the point where
the cable exits the
top of the head-
board. It is rec-
ommended to
also use support
angles below the
seat board in
installations
where the cable
cannot be hung
from a rafter or
joist above.
Adding a Roof
Garden Windows have their own integral roof with 
a glass panel. Bay and Bow Windows do not have a
water-tight roof or headboard. If the new Window sits
close to an existing overhang (cantilevered upper
floor or soffit) capping from pre-finished aluminum
coil stock can be applied and blend the unit into the
overhang as shown and no roof is needed. However,
for installations where there is no overhang, a roof is
necessary to avoid water leakage. The addition of a
roof can be a decorative addition as well.
There are pre-cut, or pre-fab roof kits available from
various manufacturers. Most times, because the Bay
or Bow Window is custom sized, pre-made roofs are
not available, so it may be necessary to build your
own.  If you install a pre-cut roof, follow the manu-
facturer’s instructions. 
To fabricate a roof for your new window begin by
marking the siding in the shape of the roof to be
added. Cut back the siding to the sheathing at least
12 inches above the top of the Bay, Bow, or Garden
Window Unit. Using plumbers’ tape (metal strapping)
attach the strap to a wall stud about 10” above the
top of the window unit. 
Cable 
Supports
Soffit
Coil Stock
Window Fitters Guide to Window Installation 
64                ©2022 AWDI, LLC Do not reproduce without permission
Brace
Cable
Support
SAMPLE MANUAL

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