Locking Dog Doors

Choosing locking dog doors

Select the cover by model, size and load direction. Top-, left- and right-loading interior frames require matching cover orientation, and an optional second cover may be used on eligible wall configurations.

Pet-door covers help stop pet access and close the opening when it is not in use. They are not a substitute for the home’s primary doors, windows, alarms or other security controls.

Fit the pet, then fit the frame

Cover size and load direction must match the interior frame. Check top, left or right clearance before choosing the orientation.

Use the smallest clear opening that still permits relaxed passage. That limits unnecessary opening area without sacrificing comfort. Mount the frame so the pet can step through and push the selected flap package in one natural motion. Very small, elderly or hesitant pets may find added flap resistance difficult at first. Confirm behavior during supervised training and reconsider flap count or mounting height if the animal consistently backs away, crawls or strikes the lower edge.

Dog Doors Depot carries 11 standard flap sizes from Small Medium through Giant, including tall intermediate sizes that separate height from width. Use the individual animal rather than the label as the decision-maker. After the clear opening is selected, compare the exact product variant because model families can use different frame, tunnel and cutout relationships. If every standard choice creates a meaningful compromise, use the custom-size workflow and keep the submitted dimensional basis attached to the order.

Weather, service and long-term use

Covers help manage pet access and close the passage, but the home’s primary doors, windows and security system remain the main security controls.

Flexible components change with use and exposure. Clean flap edges and magnets, remove hair or grit from contact points, inspect weather strip and replace panels that curl, crack or no longer return to position. Review exterior caulk and flashing as part of normal building maintenance. Close the fitted cover when pet access is not needed or during severe conditions. No pet opening is maintenance-free, but a serviceable system allows worn components to be corrected without replacing the entire frame.

From a shortlist to an order-ready configuration

Move from shortlist to order only after four checks agree. The pet fits the clear opening; the building can accept the rough opening and full frame; the selected model matches the surface and thickness; and the flap, finish, cover and accessory choices match the intended use. Save the product page and model instructions with a labeled measurement sheet. For multiple openings, give each location its own ID and configuration. Review every line before submitting because made-to-order dimensions and options should not be inferred from another opening or corrected after fabrication begins.

Read the finished configuration back as a complete sentence before approving it: model family, named size or custom dimensions, measurement basis, frame finish, flap count, installation surface, finished thickness and mounting location. Then compare that sentence with the cart, worksheet and installer scope. This catches a correct measurement attached to the wrong model or a correct product attached to the wrong opening. When two pets share the door, confirm the widest body, tallest shoulder and lowest comfortable step-over still work together. Photograph the taped frame outline and keep that image with the order so the installer can verify placement before cutting.

Related dog-door collections and guides

Common questions about locking dog doors