Cavity Sliding Doors: A Smart Space-Saving Solution for Bathrooms
When it comes to bathroom design, every millimetre matters. Between the vanity, shower, and toilet, space can quickly disappear and that’s where cavity sliding doors can make a huge difference.
Instead of swinging open into the room like a traditional hinged door, a cavity slider disappears neatly into the wall, freeing up valuable floor space and improving how the bathroom flows.
Let’s explore the benefits, key considerations, and a few important planning tips before you lock one in for your renovation.
Why Choose a Cavity Sliding Door?
1. Maximise Space and Functionality
Bathrooms are often tight, and a hinged door can be awkward if it opens into vanities, showers, or towel rails. A cavity slider eliminates that swing area completely, giving you:
More freedom to position fixtures where they work best
Easier access for kids or mobility needs
A cleaner, more open layout
In smaller bathrooms, the difference can be significant. Removing that door swing can instantly make the room feel larger and more functional.
2. Improved Accessibility
Sliding doors are easier to manoeuvre around, which makes them a great option for multi-generational homes or those designing with accessibility in mind. They’re also ideal when you want a barrier-free transition between rooms, such as a main bedroom and ensuite.
3. Clean, Modern Look
Cavity sliders give bathrooms a minimalist, contemporary look. Without visible hinges or a bulky door arc, they blend seamlessly into the wall, creating a sleek design that pairs beautifully with modern interiors.
Design and Installation Considerations
While cavity sliding doors are great for space and style, they do require more forethought in the planning stage. Here are a few things to keep in mind:
1. Wall Space and Structure
The wall where the door slides into must be clear of any plumbing, electrical wiring, or structural framing. Because the door moves into the wall cavity, you can’t install:
Shower mixers or plumbing lines
Power points or switches
Towel rails or hooks
If the ideal wall for the door conflicts with plumbing or accessories, your builder may need to build a false wall or add a small stud wall in front of the cavity unit. This allows enough space for the door and any required fittings.
2. Door Frame Quality
Always choose a quality cavity unit that suits the door weight and type you plan to install. Bathrooms are humid environments, so you’ll want a frame and rollers that can handle moisture without swelling or sticking.
3. Privacy and Sound Control
A common misconception is that sliding doors don’t offer as much privacy as hinged ones. While it’s true they don’t seal as tightly, modern cavity sliders with soft-close and privacy latches work well for most bathrooms. You can also specify acoustic-rated seals for extra sound dampening if privacy is a concern.
4. Waterproofing Awareness
Although the door itself isn’t directly exposed to water, the wall cavity should be installed clear of any wet areas to protect it from moisture ingress. Always confirm placement with your builder or designer before waterproofing begins.
When to Avoid a Cavity Slider
There are situations where a cavity door might not be the best option.
If the wall houses critical plumbing or electrical services that can’t be relocated
If your bathroom layout doesn’t have enough wall length for the cavity frame
In older homes where wall framing isn’t deep enough to support a new cavity system
In these cases, a barn door or outward swinging door might still help save space without requiring major structural changes.
A cavity sliding door can completely change the feel of a bathroom. It saves space, improves flow, and delivers a sleek, modern aesthetic. But like most good design decisions, it works best when considered early in the renovation planning process.
Before you start framing or rough-ins, chat with your builder or designer to confirm the wall is suitable and clear of plumbing.
If you’re planning your bathroom renovation and want to understand where these design details fit into the bigger picture, our Bathroom Renovation Course walks you through every step from planning and design to construction and fit-off. It’s the ultimate guide to creating a functional, well-thought-out bathroom that looks great and works beautifully.
👉 Check out the course here: Manage Your Own Bathroom Renovation Course
The real secret to renovating a bathroom is not in the demolition, tiling, or styling. It is in the planning and preparation that happens first. If you want a renovation that is on time, on budget, and stress-free, put your energy into the pre-construction stage.
Get your planning right, and the build itself becomes the easiest part.
If you need help working through these decisions, our Bathroom Layout and Design Service can guide you through the options and help you create the perfect family-friendly space.
