A cat flap should make life easier, not create problems with your door, screen, glass, security or weather sealing.
A proper cat flap installation service starts with one simple question: what is the flap being installed into? Solid timber, hollow core doors, security screens, flyscreens, single glazing and double glazing all need different installation methods.
Choosing the wrong option can lead to cracked glass, damaged screens, poor sealing, draughts, rattling, or a flap your cat does not use comfortably.
Here’s what Andy from Pet Doors Australia had to say about Pet Doors Ontime installation service.
What a Cat Flap Installation Service Should Check First
Before anything is cut, the installer should check:
- Where you want it installed – type of door, screen or glass
- What your cat size and shape is
- The best height for comfortable access
- Whether the surface is suitable for a cat flap
- The flap will affect locks, handles, rails or frames
- Whether professional glass replacement is required
This matters because a cat flap is not a one-size-fits-all product. The right installation depends on both the pet and the surface.
For help choosing a suitable flap, read our guide on choosing a pet door for cats and dogs.
Cat Flaps in Timber Doors
Timber doors are often suitable for cat flap installation, but the type of timber door makes a difference.
Solid Timber Doors
Solid timber doors are usually the most straightforward option.
They provide a strong surface for the flap and can often be cut neatly, provided the cat flap is positioned away from locks, rails, joins and structural sections of the door.
A professional installer will check the door thickness, panel layout and flap height before cutting.
Profiled Timber Doors with Detailing
Profiled timber doors need more care.
These doors may have raised panels, grooves, moulding or decorative detailing. A cat flap should sit on a flat, stable section so it seals properly and looks neat.
If the only available location crosses a raised or recessed section, the installer may need to assess whether the flap can still be fitted cleanly or provide a solution that looks aesthetically pleasing.
Hollow Core Doors
Hollow core doors can be more difficult than they look.
Because they are not solid throughout, cutting the opening may expose an internal cavity. A cat flap can often still be installed, but the cut-out may need extra support or finishing so the result is secure, neat and long-lasting. Hollow core doors also require a sturdy cat flap so that they sit cleanly in the opening.
This is one reason a cat flap installation service is worth using, even for what looks like a simple internal or laundry door.
Cat Flaps in Screen Doors
Screen doors vary a lot. Some can work well with a pet door. Others are not recommended.
For more detail, see our guide: Can you put a pet door in a screen door?
Flyscreens
Standard flyscreens are generally not recommended for pet doors.
A flyscreen is designed for airflow and insect protection. It is not designed to support the weight and repeated movement of a cat flap. Once the mesh is cut, the screen can become weak, loose or damaged.
If you only have a lightweight flyscreen, another installation location is usually a better option.
You can read more in our article on pet doors for fly screens.
Solid Mesh Security Screens
Solid mesh security screens, including Crimsafe-style screens, need specialist handling.
These screens are designed for strength and security. Cutting into them should only be done with the right tools, framing and installation method. A poor installation can affect the screen’s appearance, strength and function.
A professional installer can check whether the screen is suitable and recommend the right flap and fitting method.
For more information, read our guide on cat doors in security screens.
Diamond Grill Security Screens
Diamond grill screens are often more suitable than standard flyscreens because the grill gives the door more structure.
The cat flap still needs to be fitted properly. It must be secured into the mesh and grill area without affecting the frame, lock, handle or sliding function.
Placement matters, especially on narrow screen doors or sliding security screens.
Cat Flaps in Glass
Glass cat flap installations should always be handled by professionals.
Do not try to cut or install a cat flap into glass yourself. Incorrect handling can crack, shatter or weaken the glass. Manufacturers must cut toughened safety glass before they toughen it, so an installer cannot simply cut an existing toughened glass panel on site.
A professional will measure the panel, confirm the correct glass type, arrange the correct cut-out and install the cat flap safely.
For a full breakdown, read In Glass Pet Door Installation Explained.
Single Glazing
For single-glazed doors or windows, the existing panel often needs to be replaced with a new piece of safety glass manufactured with the correct hole for the cat flap.
This is usually not a case of cutting the existing glass on site. A professional glazier will measure the panel, arrange replacement glass with the correct cut-out, and then install the cat flap into the new glass.
Double Glazing
Double glazing is more specialised.
A double-glazed unit is sealed, so a cat flap cannot simply be added to the existing unit. Your glazier will need to measure exactly what is required and arrange the manufacture of a new double-glazed with the correct cut-out.
This requires accurate measuring, correct specifications and professional installation. It may also involve a lead time while the new unit is made.
If you are comparing options, see our article on how much it costs to install a pet door in glass.
Choosing the Right Cat Flap
The flap needs to suit your cat, the door type and the way your home is used.
A flap that is too small may make your cat squeeze, crouch or avoid using it. A flap that is too large may create unnecessary draughts or may not suit the installation surface.
Think about:
- Your cat’s height and width
- Whether the flap needs to lock
- Whether you want to keep other cats out
- Whether a microchip cat flap is needed
- Whether the door, screen or glass can support the flap size
A good cat flap installation service will help match the product to the surface and your cat, not just fit the first flap available. Also check out our guide on the best pet doors in Australia.
Why Professional Installation Is Worth It
DIY installation can seem simple, especially in timber. But mistakes can be expensive.
A poor installation can damage the door, weaken a screen, crack glass, create draughts or leave the flap at the wrong height.
Professional installation is especially important for:
- Single glazing
- Double glazing
- Toughened glass
- Sliding glass doors
- Solid mesh security screens
- Crimsafe-style screens
- Diamond grill screens
- Profiled timber doors
- Hollow core doors
In glass, professional installation is essential.
What to Expect from the Installation Process
The process usually starts with photos and basic details about your door, screen or window.
The installer will check whether the location is suitable, recommend the right cat flap and explain whether the job can be completed on site or needs a measured replacement panel.
For timber and some screen doors, the installer may be complete the job in one visit. For single glazing and double glazing, the glass usually needs to be measured and manufactured before the final installation.
That extra step is important. It keeps the installation safe, compliant and properly finished.
A Better Result Starts with the Right Advice
The best cat flap installation service does more than cut a hole and fit a flap. A professional installer checks the surface, recommends the right product and installs it in a way that is safe, neat and practical.
Solid timber doors, profiled timber doors, hollow core doors, flyscreens, security screens, diamond grill screens, single glazing and double glazing all need different treatment.
If the installation involves glass, it should always be handled by a professional.
Done properly, a cat flap gives your cat freedom while keeping your home secure, tidy and easy to live in.
For more information about pet door installation visit Pet Doors Ontime at www.petdoorsontime.com
