Walk into any large hardware store in Sydney and you will find shower screens on the shelf, boxed up and ready to take home. They come in standard sizes, standard frame colours, and standard configurations. The price tags look reasonable. The packaging shows a clean, modern bathroom.
For some homeowners, this seems like the obvious choice. Buy a screen, hire someone to install it, save the difference. Simple.
Except it rarely works out that way. And the reason comes down to one thing that no big box retailer can solve from a warehouse shelf: your bathroom is not standard.
The Standard Size Problem
Off the shelf shower screens are manufactured in set dimensions. The most common widths are 900mm, 1000mm, 1100mm, and 1200mm. Heights are typically 1900mm or 2000mm.
If your shower opening happens to match one of those exact dimensions, you are in luck. The screen will fit without modification.
But most bathrooms do not land on those numbers. A shower recess that measures 1050mm wide does not fit a 1000mm screen (too much gap on the sides) or an 1100mm screen (too wide to fit between the walls). An opening that is 1170mm wide falls between two standard sizes with no clean solution.
In project homes across South West Sydney, the problem is even more common. Builders work to their own specifications, and shower recesses in suburbs like Gregory Hills, Oran Park, and Spring Farm vary from house to house, even within the same estate. Tile thickness, waterproofing membranes, and wall framing tolerances all affect the finished opening dimensions. Two bathrooms that look identical on the builder’s plan can measure differently once tiling is complete.
What Happens When the Screen Does Not Fit
When a standard screen is too narrow for the opening, the installer has to fill the gap. This usually means adding filler strips, extra silicone, or aluminium channels along the sides. These additions are visible, they collect moisture and grime, and they make the finished result look like a compromise rather than a clean installation.
When a standard screen is too wide, the installer has to trim it. Trimming a framed screen means cutting the aluminium frame and resealing the edges. Trimming a glass panel is not possible on site because toughened glass cannot be cut after tempering. If the glass does not fit, the entire panel needs to be exchanged for a different size, assuming one exists.
In both cases, the “savings” from buying off the shelf start disappearing. Filler strips cost extra. Return trips cost extra. Exchange fees cost extra. And the end result is still a screen that was adapted to fit rather than built to fit.
The Wall Problem
Standard shower screens assume your walls are perfectly plumb, meaning straight and vertical from top to bottom. They also assume the walls are perfectly square to each other, meeting at exact 90 degree angles.
In reality, walls in Australian homes are rarely perfect. Settlement, framing tolerances, and tile application can all create walls that lean slightly, bow in the middle, or meet at angles that are a degree or two off square.
A custom built shower screen accounts for this. The glazier measures the walls at multiple points, checks for plumb and square, and builds the screen to fit the walls as they actually are. If the left wall leans in by 3mm at the top, the fixed panel is cut to match. If the back wall bows slightly, the screen is templated to follow the contour.
An off the shelf screen cannot do this. It is built to a perfect rectangle. If your walls are not perfect rectangles (and they almost never are), the screen will have gaps, uneven contact with the walls, and waterproofing issues at every point where the glass does not sit flush.
The Hardware Limitation
Off the shelf screens come with hardware that is designed to work with that specific product. The hinges, brackets, handles, and seals are included in the box, and they are manufactured to a price point.
This hardware is functional but limited. You get one handle style, one hinge type, and one finish colour. If you want matte black fittings to match your tapware, or brushed nickel to match your towel rails, you are stuck with whatever the manufacturer decided to include.
Custom screens use hardware selected for your specific configuration. The hinges are rated for the weight and thickness of the glass. The handle style and finish are chosen to match your bathroom. The seals are cut to the exact length needed, not trimmed from a generic strip.
This is not a cosmetic difference. Hardware that is correctly rated for the glass weight lasts longer and operates more smoothly. Hinges that are too light for the door will wear out faster, leading to the door alignment drift that plagues cheap installations.
The Configuration Limitation
Off the shelf screens come in a limited number of configurations. Most are front only designs, meaning a single fixed panel and a single door across the front of an alcove shower.
If you need a front and return configuration (glass on two sides), a diamond entry for a corner shower, or a sliding door with a return panel, off the shelf options are either unavailable or extremely limited.
Even within the standard front only configuration, the position of the door relative to the fixed panel, the swing direction, and the width split between door and fixed panel are all locked in by the manufacturer. With a custom screen, every one of these elements is decided based on your bathroom layout and how you actually use the space.
The Real Cost Comparison
The upfront price of an off the shelf screen is lower. That part is true. But the total cost of ownership tells a different story.
An off the shelf screen that needs filler strips, hardware upgrades, or return visits to correct fit issues ends up costing more than expected. And even after those corrections, the result is a screen that was adapted rather than designed for the space.
A custom screen costs more upfront but arrives ready to install with no modifications, no filler strips, and no return visits. The glass is cut to your measurements. The hardware is selected for your configuration. The installation is done by the team that built the screen and knows exactly how it should fit.
Over a ten year period, the custom screen is also less likely to need repairs, seal replacements, or hardware upgrades. The components are matched to the application from day one, rather than being generic parts pushed beyond their design limits.
When Off the Shelf Makes Sense
There are situations where an off the shelf screen is reasonable. If you are fitting out a rental property with a perfectly standard shower opening and your priority is cost, a standard screen will do the job. If you are replacing a screen temporarily while planning a full bathroom renovation, a cheap screen that lasts two years is a practical choice.
But for a home you live in, where the shower is used daily and you want a result that looks right and lasts, a screen built to fit your bathroom will always outperform one pulled off a shelf.
Get a Screen Built for Your Bathroom
Casse Glass measures every bathroom on site and builds every screen to order. No standard sizes. No filler strips. No compromises. Whether you need a frameless or semi frameless design, we build it to fit. Contact us for a free measure and quote.
