Playing doorman every time your dog wants out gets old fast. A dog door hands that job over to your pet, so they can head to the yard and come back while you stay put. It also cuts down on the drafts and scuffed paint that come from a door swinging open all day.
Cutting a hole in your own door sounds nerve-wracking, but on a standard wooden or fiberglass door it is a two to three hour afternoon project using tools most people already own. Below you’ll find how to size the flap to your dog, which door types are worth buying, the full cut-and-fit steps, and how to seal the opening against the weather.
Key Takeaways
- Size the flap to your dog: Measure width at the widest point and height to the withers, then add up to two inches so your dog clears the opening without ducking or squeezing.
- Mark and cut with a template: Tape the kit’s paper template to a removed door, drill a starter hole in each corner, and cut the opening with a jigsaw.
- Seal against the weather: Run outdoor-rated silicone caulk around the exterior frame so rain cannot reach the door core and cause rot.
- Train with the flap taped open: Lure your dog through with treats first, then lower the flap and coax them to nose it open.
Types of Dog Doors
Picking the right door is about more than just size. You need to balance security, insulation, and ease of access. Modern pet doors offer far more features than the classic plastic flaps of the past.
Here are the most common options available:
Energy-Efficient Pet Doors
Standard flaps often leak air, which drives up your utility bills. Energy-efficient models, like the PetSafe Extreme Weather Pet Door, utilize a three-flap system and strong magnetic seals. This design traps a pocket of air to create an insulation barrier.
If you live in an area with extreme heat or cold, spending a little more on an insulated door prevents drafts and saves money in the long run.
Pet Doors for Sliding Glass Doors
Cutting through glass is difficult and expensive. The PetSafe One-Piece Sliding Pet Door solves this by inserting a panel into your existing track. It adjusts to the height of your sliding door and requires no permanent modification.
This is a perfect solution for renters or anyone who wants to take the dog door with them when they move.
Interior Pet Doors
Sometimes you need to control access inside the home, such as keeping the dog out of the bedroom or letting the cat into the laundry room. The Baboni Pet Door is a sturdy option for interior walls or hollow-core doors. It gives your pet reign over the house without requiring you to leave doors wide open.
Electronic Pet Doors
Security is a major concern for many homeowners. Electronic doors, such as the SureFlap-Sure Automatic Pet Door, only open when they detect your pet. They work by reading your pet’s existing microchip or a specialized RFID collar tag.
This prevents raccoons, stray cats, or other unwanted guests from entering your home.
Window Sash Pet Doors
If you lack a suitable door, you can use a window. The Ideal Pet Products Aluminum Sash Window Pet Door fits into the track of a sash window. It installs quickly and allows your dog to jump in and out through the window opening.
Wall-Mounted Pet Doors
When a door installation isn’t feasible, you can go through the wall. The PetSafe Wall Entry Pet Door includes a telescoping tunnel to bridge the gap between the interior and exterior drywall.
Wall installations offer flexibility in placement, but you must be careful to avoid electrical wires and plumbing studs inside the wall cavity.
How to Install a Dog Door
The most common installation method is mounting the unit into an existing wooden or fiberglass exterior door. It is a straightforward job if you measure twice and cut once.
Grab these tools before you begin to ensure a smooth process:
What You’ll Need
- Tape measure.
- Power drill and bits.
- Jigsaw.
- Sandpaper (medium grit).
- Utility knife.
- Pet door kit (frame and hardware).
- Pencil or marker.
- Exterior silicone caulk.
- Hammer and nail punch.
- Screwdriver.
- Safety gear (Dust mask, eye goggles).
- Sawhorses.
Dog Door Installation Costs
If you hire a handyman to fit a door into a standard entry or back door, labor usually runs about $75 to $300, and most projects land between $200 and $800 once you include the door itself. A pro needs roughly one to four hours depending on the surface. Wall installations are a bigger job: cutting through the wall and running a tunnel between the interior and exterior can push materials and labor anywhere from $200 to $2,000, and glass or brick pushes it higher still.
Doing it yourself removes the labor cost, so you only pay for the pet door unit. Basic plastic flaps start around $40, while electronic, microchip-reading models can run a couple hundred dollars or more.
1. Measure Your Dog
You must size the door correctly for your pet, so measure before you buy anything. Measure the width across the widest part of your dog’s body, usually the chest or hips, and add about two inches of clearance. Then measure the height from the floor to the withers, the top of the shoulders, and pick a flap that clears the back by at least one and a half to two inches. Measure to the back, not the head, because dogs duck slightly as they step through.
One number people forget is the step over, the gap between the ground and the bottom of the flap. Set it as low as your dog can comfortably cross, generally no higher than their elbow, so an older or short-legged dog is not forced to hop through. Keep the overall opening as small as your largest pet needs, since a smaller hole is easier to weatherproof and harder for an intruder to use.
Check Regulations
Verify that installing a dog door complies with your local building codes and fire safety regulations. If you rent or live in an HOA, check your lease or bylaws before cutting any holes.
2. Apply the Template
Your pet door kit should include a paper template. Tape this template to the door at the appropriate height. The bottom edge of the opening should be at least three inches above the bottom of the door to maintain structural integrity, but low enough for your dog to step over easily.
Trace the outline onto the door with a pencil. If your kit lacks a template, use the inside of the frame itself to draw your guide.
3. Remove the Door
It is much safer and easier to cut the hole with the door lying flat. Use a hammer and a nail set (or screwdriver) to tap the hinge pins up and out. Lift the door off the hinges and lay it across your sawhorses.
Safety First
Wear your safety goggles and a dust mask. Cutting into door cores produces fine dust and debris that can irritate your eyes and lungs.
4. Drill Starter Holes
Using a drill bit slightly larger than your jigsaw blade (usually 3/8-inch or 1/2-inch), drill a hole inside each of the four corners of your drawn outline. These holes allow you to insert the saw blade to begin the cut.
5. Cut the Opening
Insert your jigsaw blade into one of the corner holes. Cut slowly along your traced line, moving from corner to corner until the block of wood is free. Take your time to keep the line straight.
Once the center is removed, use sandpaper to smooth out any rough edges or splinters inside the cut.
6. Test Fit the Frame
Place the interior frame (the side with the flap) into the hole to ensure it fits snugly. If it binds or won’t sit flush, use a rasp or the jigsaw to trim the opening slightly.
7. Drill Mounting Holes
With the frame in the hole, mark the spots for the screws. Remove the frame and drill these holes using the bit size recommended in the instructions. Keep the drill perpendicular to the door so the holes line up perfectly with the exterior frame.
8. Assemble the Door
Sandwich the door between the interior and exterior frames. Insert the long screws through the interior side and thread them into the exterior frame.
Tighten them evenly, but do not overtighten, as this can crack the plastic frame or warp the flap mechanism. If the screws are too long for your door thickness, use wire cutters to trim them or use the shorter set provided in the kit.
9. Seal the Edges
Apply a bead of outdoor-rated silicone caulk around the perimeter of the exterior frame where it meets the door. This prevents rain and moisture from seeping into the door core, which causes rot and swelling.
10. Rehang the Door
Lift the door back onto its hinges and tap the pins back into place. Open and close the main door to ensure the pet door doesn’t interfere with the jamb or the threshold.
11. Train Your Dog
Your dog might be skeptical of the new contraption. Tape the flap open initially so they can see through it. Encourage them to pass through using high-value treats and lots of praise.
Once they get the hang of it, lower the flap and coax them to push through with their nose. Be patient; forcing them through can create fear and make the process take longer.
Tips for Installing Pet Doors
A few strategic decisions can make your installation more secure and durable. Keep these professional tips in mind before you start drilling.
Center on Flat Surfaces
If you have a paneled door, try to center the pet door on a flat section or within a lower panel. Installing across raised molding or uneven contours creates gaps. If you must cut through molding, you will need to fill the gaps with extra caulk or wood filler to ensure a watertight seal.
Check for Obstructions
When installing into a wall, use a stud finder to locate studs, and be mindful of electrical wiring and plumbing. Cutting into a live wire or a water pipe turns a simple DIY project into a dangerous and expensive disaster.
Avoid Structural Weakness
Do not install a pet door too close to the lockset or the hinges. Cutting too close to the edge of the door weakens its structure and makes it easier for intruders to break in. Always leave a solid perimeter of wood around the cutout.
Use the Security Cover
Most pet doors come with a slide-in locking cover. Get in the habit of using this at night or when you leave for vacation. It adds a layer of insulation and prevents critters from entering while you sleep.
Doggy Door Alternatives
If you aren’t ready to cut a hole in your door, there are less permanent ways to give your pet freedom.
Door Latches
A Door Buddy Dog Latch holds your door slightly ajar. It creates a gap wide enough for a cat or small dog to slip through but narrow enough to keep toddlers or larger dogs out of specific rooms. This is great for interior use but not secure for exterior doors.
Smart Door Sensors
For a high-tech approach, some smart home systems allow you to install automatic door openers. These systems physically swing the main door open when they detect your pet’s sensor, though they are generally expensive and require complex installation.
FAQs
Final Thoughts
Installing a dog door is one of the best upgrades you can make for your pet’s happiness and your own convenience. Whether you choose a simple flap or a high-tech electronic model, the freedom it provides is well worth the afternoon of work.
Just remember to measure carefully, seal the frame against the weather, and take the time to train your dog properly. Once they master the flap, you’ll wonder how you ever lived without it.
