Pet Door Installation: Step-by-Step Guide for Beginners

Quick answer

To install a pet door, first measure your pet's height and width, then choose a door or wall location that avoids studs, wiring, and plumbing. Cut the opening slightly larger than the flap frame, secure the frame with screws, and seal all edges. For beginners, a door-mounted pet door is easier than a wall installation because it avoids structural cutting.

Measure your pet and the opening

Use a flexible tape measure to find your pet's widest point (usually the chest) and tallest point (top of the head or ears). Add 2 inches to both measurements for comfortable clearance. This is the minimum flap size. If you are measuring for a pet door, also check the thickness of your door or wall; most pet doors include a tunnel that adjusts for different thicknesses, but you may need an extension kit for thick walls.

Choose the right location

For a door installation, pick a spot that is at least 3 inches from the door's edge and away from hinges. For a wall installation, use a stud finder to locate framing and avoid electrical wires or pipes. A wall installation is more permanent and requires cutting through drywall, siding, and possibly insulation. If you rent, a door-mounted pet door is easier to replace later.

Gather tools and accessories

You will need a jigsaw, drill, tape measure, pencil, level, caulk, and safety glasses. Many pet doors come with basic screws and a template. Consider pet door accessories like a closing panel for security or weatherproofing, and a ramp for small pets. If you have a cat, a round kennel like the Petmate Get-A-Round E-Z Load Kennel For Cats can help acclimate your cat to a confined space before using the pet door, but it is not a substitute for training.

Cut the opening

Trace the template onto the door or wall. For a door, drill a starter hole and use a jigsaw to cut along the line. For a wall, cut through drywall first, then carefully cut through siding and sheathing. Check for obstructions as you go. A common mistake is cutting too fast and splintering the wood or cracking the drywall. Cut slowly and support the cutout piece.

Install the frame and flap

Insert the pet door frame into the opening. If the frame has a two-piece design, attach the interior and exterior pieces with screws provided. Make sure the flap swings freely and closes completely. For wall installations, you may need to build a tunnel from wood or purchase an extension kit. Seal all edges with exterior-grade caulk to prevent drafts and water entry.

Train your pet and maintain the door

Hold the flap open and encourage your pet to walk through with treats. Never force them. Some pets need a few days to adjust. Check the flap regularly for wear and clean it with mild soap. If you have a dog that likes to tug, keep a durable toy like the Chuckit! Ultra Tug Dog Toy away from the flap to avoid damage. For outdoor dogs, a dog house such as the Petmate Husky Dog House can provide shelter, but it does not replace a pet door.

Pet door installation steps

1. Measure pet and opening: Measure your pet's chest width and height, then add 2 inches. Check door or wall thickness for tunnel length. Checkpoint: Write down measurements and compare to the pet door's flap size before buying.
2. Pick location and check for obstructions: For doors, stay 3 inches from edges. For walls, use a stud finder and avoid wires or pipes. Common mistake: Cutting into a stud or pipe. If unsure, choose a door installation instead.
3. Trace and cut the opening: Use the provided template, drill a starter hole, and cut with a jigsaw. Support the cutout to prevent splintering. Checkpoint: Test-fit the frame before cutting further. The opening should be snug but not tight.
4. Install frame and flap: Insert the frame, screw both sides together, and ensure the flap swings freely. Seal edges with caulk. Common mistake: Over-tightening screws, which can crack the frame. Tighten until snug.
5. Train your pet: Hold the flap open, lure your pet through with treats, and praise. Repeat short sessions daily. Checkpoint: Never force your pet. If they resist, try again later or consult a trainer.

Products that support pet door training

• Get-A-Round E-Z Load Kennel For Cats: The Petmate E-Z Load Get-A-Round Kennel For Cats is a round plastic kennel designed for cats, with an extra-large opening for easy loading. If you are installing a pet door for cats, this kennel can help your cat feel secure during travel or vet visits, making the transition to a pet door less stressful.
• Chuckit! Ultra Tug Dog Toy: The Chuckit! Ultra Tug Dog Toy is a durable rubber ball on a leash-style cord with a 2-ply nylon handle, designed for tug-of-war and fetch. After installing a pet door for dogs, use this toy for active play to redirect your dog's energy away from scratching or pushing the flap.
• Petmate Husky Dog House: The Petmate Husky Dog House features an elevated floor, rear ventilation, and leak-proof structural foam construction with a dome shape and offset door. If your dog spends time outdoors and you install a pet door, this dog house offers a dry, ventilated shelter that complements the door's access.