Is My Sliding Door Suitable for the Glass Patio Pet Door?

Before installing a Glass Patio Pet Door, it’s important to check whether your sliding glass door is suitable. This guide will walk you through the key considerations.

1. Locking Hardware

• Check your existing handle and lock: Some sliding doors have internal locking hardware inside the track, which can block the pet door from sitting correctly.

• Look for screws or fittings in the track where the pet door would be placed.

• If locking hardware is present: In most cases, you can unscrew and remove it, then store it safely for future use.

2. Door Track Compatibility

For proper installation, your sliding door track must:

• Be wider than 19 mm

• Be clear of locking components inside the track

• Be wide enough to hold the pet door frame securely

Note: Older or custom sliding doors may not be suitable.

3. Door Type Compatibility 

4. Quick Measurement Checklist

Before purchase, check these three things:
Track Width – 19 mm (0.75") or more
Clear Track – No locks, screws, or fittings blocking the track
Height Range – Confirm your door height fits within the Glass Patio Pet Door’s adjustable range (see product specs) or Glass Patio - Extension Height Guide

Clearance – Ensure there is still enough space to comfortably walk through the sliding door after the pet door is installed. 

Tip: To test clearance before buying, slide your door open by the reduced width that would remain once the pet door is installed. Walk through and see if it feels comfortable.