Installing a pet door is one of the most rewarding upgrades you can make as a pet owner. It adds convenience, improves your pet’s independence, and simplifies daily routines. However, improper installation can lead to drafts, security concerns, or long-term damage to your door or wall.

At Moore Pet Supplies, we’ve spent 30 years helping customers choose the right products—and just as importantly—install them correctly. If you’re planning to add a pet door to your home, here are the most common mistakes to avoid.

1. Choosing the Wrong Size
One of the biggest mistakes happens before installation even begins. A pet door that’s too small will be uncomfortable or unusable for your pet. One that’s too large can reduce energy efficiency and may not seal properly.

Always measure your pet’s height (floor to shoulder) and width (widest point). When in doubt, size for your largest pet.

2. Installing It Too High or Too Low
Placement matters. The bottom of the pet door opening should typically align close to your pet’s belly line—not their shoulders. Installing it too high can make it difficult for smaller or older pets to step through comfortably.

Careful measurement and marking before cutting is critical.

3. Skipping Insulation Considerations
Many homeowners focus on convenience and overlook energy efficiency. Cutting into a door or wall without proper sealing can create drafts and increase heating and cooling costs.

Using a high-quality, insulated pet door and ensuring tight seals during installation will help maintain indoor comfort year-round.

4. Improper Wall Installations
Wall-mounted pet doors require careful planning. Cutting into a wall without understanding what’s inside—such as wiring or plumbing—can lead to serious issues.

Always check for obstructions and follow installation instructions carefully. If you’re unsure, consulting a professional installer is a wise decision.

5. Not Sealing the Frame Properly
Even the best pet door can underperform if it isn’t sealed correctly. Gaps between the frame and the door or wall can allow air, moisture, and insects to enter.

Take your time during installation and use appropriate sealants and hardware to ensure a tight, secure fit.

6. Ignoring Security Features
Some homeowners forget to consider how they’ll secure the pet door when it’s not in use. Locking panels or covers are important for nighttime or extended travel.

Choosing a model with built-in security features ensures you maintain control over access to your home.

Take Your Time—It Pays Off
Rushing a pet door installation can lead to long-term frustration. Measuring carefully, selecting a high-quality product, and following proper installation steps will result in better performance and durability.

For three decades, Moore Pet Supplies has helped pet owners across the country choose reliable pet doors designed for performance, comfort, and long-term use. When installed correctly, a quality pet door becomes a seamless part of your home.

If you’re ready to install a pet door the right way, we’re here to guide you every step of the process.