Dog Door Minimum Window Size Requirements

Small Dog Door/Cat Door installed into a low light

All of our dog doors are installed into toughened glass. Toughened glass requires a certain amount of room on either side of the hole. For a more in-depth understanding about toughened glass please read here Toughened Glass for Dog Doors

Small Dog Doors: Hole size is 267mm, with a minimum window size requirement being width H417XW467mm. This will leave 100mm either side of the left and right side, and 50mm from the bottom and 100mm from the top. This could be considered generous but we think a good standard. In all honesty, I’d prefer a larger window but if this is your absolute minimum then these sizes are possible.

Medium Dog Doors: Hole size is 385mm, with a minimum window size requirement being H535XW585mm. This will leave 100mm on either side of the left and right side, and 50mm from the bottom and 100mm from the top. Same formula as the small dog door

Large Dog Doors: Cut out size H475X340. Following the same formula starting from the hight, a minimum window size requirement is 625X540 which will leave 50mm from the bottom, 100mm from the top, and 100mm from either side of the left and right side.

Extra Large Dog Doors: H643X395mm. Following the same formula as the large dog door starting from the hight, a minimum window size requirement is 793X595 which will leave 50mm from the bottom, 100mm from the top, and 100mm from either side of the left and right side.

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