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10 Customer Care Center +1 (800) 732-2677
Installation in Glass Doors and Windows
It is not possible to cut holes in tempered or double pane glass except at the
time of manufacture. Consult a professional glazier or glass manufacturer to
install the pet door in a glass door or window.
The Big Cat Door is also designed for installation in glass windows and doors. Cutting glass
is a skilled job and should be done by a professional glazier or glass manufacturer. To install
the pet door in glass, mark your pet’s shoulder height and location for the pet door using
instructions listed in Step 1 under Non-Glass Doors. Your glazier will need to cut a circular
hole with a diameter of 10
3
⁄8 ˝ (263 mm) with the center of the circle 1
13
⁄16 ˝ (46 mm) below the
shoulder height mark. After the cut-out is made, then the pet door can be installed using the
installation instructions under Non-Glass Doors starting with Step 5B.
Sliding Glass Door or
Window Installation:
If installing the pet door in a sliding glass
door or window, the pet door should be
installed on the inner panel with the interior
frame on the inside of the house so the
4-way lock does not prevent your door or
window from working properly.
(See Figure 1)
Outer Panel Inner Panel
Pet Door
(exterior frame)
Pet Door
(interior frame with 4-way lock)
Figure 1
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