Short Answer
Yes. The Glass Patio Pet Door can be fitted with an optional Bottom Riser that raises the entire pet door by 50 mm (2.0").
This increases the flap clearance height, giving taller pets more room to comfortably enter and exit without crouching as much.
Why Would I Use a Bottom Riser?
Some taller pets may benefit from additional clearance when passing through the pet door.
The optional Bottom Riser raises the entire Glass Patio Pet Door by 50 mm (2.0"). This:
- Increases the flap clearance height, making it more comfortable for taller pets to use.
- Increases the step-over measurement by 50 mm (2.0").
- Increases the overall height of the Glass Patio Pet Door by 50 mm (2.0"), which should be considered when checking your sliding door height.
This can make the pet door more comfortable for larger breeds by reducing how much they need to crouch when entering and exiting the pet door.
Flap Clearance by Size
| Glass Patio Pet Door Size | Standard | With Bottom Riser |
|---|---|---|
| Small | 235 mm (9.3") | 285 mm (11.2") |
| Medium | 365 mm (14.4") | 415 mm (16.3") |
| Large | 560 mm (22.0") | 610 mm (24.0") |
Step-Over Measurement
The Bottom Riser also increases the height your pet steps over to enter the flap.
| Glass Patio Pet Door Size | Standard | With Bottom Riser |
|---|---|---|
| Small | 50 mm (2.0") | 100 mm (3.9") |
| Medium | 100 mm (3.9") | 150 mm (5.9") |
| Large | 150 mm (5.9") | 200 mm (7.9") |
How Do I Know If My Pet Needs a Bottom Riser?
Measure your pet from the floor to the highest point of their back while standing naturally.
Compare this measurement with the top of the flap opening shown in the table above.
For comfortable everyday use, your pet should be able to pass through the flap without needing to crouch excessively.
While the Bottom Riser increases the flap clearance height, remember it also increases the step-over measurement, so your pet must still be able to comfortably step over the bottom of the frame.

Installing the Bottom Riser
The Bottom Riser installs beneath the Glass Patio Pet Door using the supplied hardware and raises the entire pet door by 50 mm (2.0")
Important Considerations
Only 1 Bottom Riser can be installed per Glass Patio Pet Door.
The Bottom Riser is designed to improve flap clearance for taller pets—it is not intended as a primary height extension for taller sliding doors.
Always measure your pet before purchasing accessories.
The Bottom Riser increases the overall height of the Glass Patio Pet Door by 50 mm (2.0"). Before purchasing, make sure your sliding door opening has enough additional height to accommodate the increased overall size of the pet door.
Because every pet is different, customers should measure their own pet and compare the measurements with the flap opening before purchasing.
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Keywords
glass patio pet door bottom riser, raise flap height, taller dog pet door, glass patio pet door flap clearance, bottom riser extension, pet door for tall dogs, glass patio pet door accessories
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