A pet door can put an end to the familiar routine of getting up to let the dog out, then back in five minutes later. But cutting an opening into a door or glass panel is not a job to rush. The right pet doors give your animal freedom while keeping your home secure, weatherproof and looking tidy.
For Geelong homes, the best choice depends on your pet, the type of door or glazing you have, and where the opening sits in relation to wind, rain and everyday foot traffic. A well-fitted unit should feel like part of the home, not an afterthought that creates draughts, rattles or a security concern.
Start with your pet, not the opening
The most common mistake is choosing a flap based only on a pet’s current size. Puppies grow, cats vary more in height than many owners expect, and older animals may need extra clearance to step through comfortably. Measure your pet at the widest point of their body, then measure from the floor to the bottom of their chest or belly. This gives a sensible starting point for both flap width and height.
A pet door should allow your pet to pass through without crouching, squeezing or catching their back. For a dog, allow a little room above the shoulders and on either side. For cats, think about their confidence as well as their dimensions. A very large flap can feel exposed to a timid cat, while a smaller, well-positioned option may encourage regular use.
Also consider who else may use it. If you have a large dog and a small cat, a flap sized for the dog may be too easy for other animals to enter. In that situation, access control may be worth considering rather than simply choosing the largest available opening.
Where can pet doors be installed?
Pet doors can be fitted into more places than many homeowners realise. The most suitable location depends on the construction of the existing door or panel, the condition of the frame and the level of security required.
Glass doors and fixed glass panels
A glass installation is often the cleanest solution for homes with sliding doors, hinged glass doors or fixed panels beside an entry. The opening needs to be planned before a new glass panel is made. Existing toughened safety glass cannot simply be cut after installation, because cutting toughened glass causes it to shatter.
Instead, a qualified glazier measures the panel, arranges replacement safety glass with the required opening, then installs the new panel and pet door correctly. This protects the integrity of the glazing and avoids an improvised result. It is particularly useful where a timber or aluminium door is not the right place for a flap.
For many homes, fitting the pet door into a fixed side panel rather than the main sliding panel is a practical choice. It keeps the sliding door operating as intended and can reduce wear around a busy access point. The right answer depends on the layout of the room and how your pet moves between indoors and outdoors.
Timber, aluminium and screen doors
Timber doors can often accommodate a pet door well, provided the opening does not weaken an important structural section. Aluminium doors require care around rails and internal sections, while security screen doors need a purpose-made solution that maintains the screen’s strength and function.
A pet door through a standard flyscreen alone may be convenient, but it will not provide proper security or weather protection. If the screen door is your main barrier, discuss an option designed for that application rather than compromising the door for a quick fix.
Choose the right type of pet door
Basic flap-style pet doors are popular because they are simple, familiar and cost-effective. They suit many cats and dogs, particularly when installed in a sheltered location. Look for a durable flap that seals neatly and can be secured when needed.
Lockable models give you more control. They can help keep pets inside overnight, prevent access while you are away, or close off the opening during severe weather. Some allow one-way settings, which can be handy when a pet needs to come in but should not head straight back out.
Microchip pet doors are a useful option for cat households where neighbourhood cats are a problem. The flap recognises your pet’s registered microchip or collar tag and opens only for them. They cost more than a manual model and need batteries or power, but the added control can be worthwhile if unwanted visitors have been helping themselves to food, warmth or a spot on the couch.
For larger dogs, strength matters as much as dimensions. Choose a unit built for the weight and regular use of your dog, with a solid frame and a flap that will not warp or pull loose over time. A lighter product may be fine for a small indoor cat but not for an enthusiastic labrador charging outside at breakfast.
Security and weather protection matter
A pet door is an opening in your home, so it deserves the same practical thinking as any other door or window. The size, location and locking method all affect security. A small cat flap in a suitably located panel presents a different risk from a large dog door close to a lock or easily reached window handle.
Avoid locating a larger flap where it could give someone access to internal handles, keys or alarm controls. Keep those items out of reach regardless. If the opening is in a rear or side area with less visibility, a lockable flap and good external lighting can provide extra reassurance.
Geelong weather can change quickly, and wind-driven rain is hard on poorly fitted flaps. A quality seal, correct installation and sensible location help keep draughts and water out. If your preferred spot is very exposed, it may still work, but choosing a more weather-resistant model or a sheltered panel can make a noticeable difference.
Glass work should also use the appropriate safety glass. This is especially relevant in doors, low-level panels and areas where people and pets regularly pass. The aim is not only a neat opening, but a safe and compliant installation that stands up to daily use.
Plan the height and outdoor landing area
The bottom of the flap should sit at a height your pet can use comfortably. A very low opening may suit a cat, while a larger dog may need a higher position based on its chest height. Where there is a step down outside, take that level change into account. Your pet should not have to jump awkwardly through the opening every time they go out.
Outside, check that there is a stable, dry landing area. Mud tracked through the house is rarely a pet door problem on its own – it is often a drainage, paving or garden-path problem immediately outside the door. A small mat, pavers or a covered area can make the access point far more practical in winter.
Inside, make sure furniture does not block the approach. Cats like a clear line of sight, and dogs need enough room to turn and walk through naturally. If the door is near a busy walkway, give your pet time to adjust and discourage children from standing around the flap while they learn to use it.
A professional fit saves repeat repairs
A pet door should open freely, sit square and seal properly when closed. It should not interfere with door rollers, sliding tracks, locks or the strength of the surrounding panel. These details are where an experienced installer makes the difference, particularly with glass doors and custom-sized panels.
At ACW Glazing & Maintenance, the process starts with inspecting the existing door or glass, discussing your pet’s needs and confirming the best location. From there, the work can be planned around the correct glass, pet door size and finish, so the completed job is safe, neat and ready for daily use.
Before booking, have a quick look at where your pet already waits to go outside. That spot often tells you more than a catalogue does. A well-chosen, properly installed pet door gives your pet independence and gives you one less door-opening job to do each day.