Is the flap lockable? David July 15, 2019 02:22 Updated Yes, you can lock the flap with the locking plate provided. Related articles I’m in a rental property and cannot install anything permanently, will this work? My sliding door doesn't slide into the channel on the pet door what do I do? How Secure is the Panel? How does the barlock work? Sizes - Patio Pet Doors Comments 0 comments Please sign in to leave a comment.