Rectangular Shower Trays
How do you pick the right rectangular shower tray size?
Finding the right dimensions depends on your available floor space and how open you want the room to feel. Standard rectangular shower tray sizes in the UK generally fall into three main layout categories:
Compact En-Suites (900mm to 1000mm): A rectangular shower tray 1000 x 800 mm is a great fit for medium en-suites. If you want extra depth for shoulder clearance without extending length, a 1000 x 900 rectangular shower tray gives you that added room.
Standard Family Bathrooms (1100mm to 1200mm): Installing a 1200 x 900 rectangular shower tray provides a generous daily shower that easily replaces a standard bath.
Large Walk-In Spaces (1400mm to 1800mm): Expansive 1400mm to 1800mm bases are built for open glass partitions and luxury master suites.
Why is a rectangular shower tray right for your bathroom?
A rectangular shower base is one of the most popular choices for UK home renovations because it solves several common layout challenges:
Ideal for Bath Conversions: Rectangular trays are a suitable choice for bath replacement projects. You will need to consider waste position and tray dimensions before ordering.
More Shoulder Clearance: The longer shape gives you extra room to turn around and move comfortably.
Great for Long or Narrow Rooms: Tucking a long tray against a main wall or alcove keeps central walkways open and easy to navigate.
To see how these compare against square or space-saving quadrant models, browse our full collection of Shower Trays.
What should you check before ordering a rectangular shower tray?
Always check following shape specific details before ordering a rectangular base.
Long Edge vs. Short Edge Orientation: Double-check how the length (e.g., 1200mm) and depth (e.g., 800mm) align against your walls. Ensure the longer side leaves clear walking space around vanity units, radiators, or doors.
Bathtub Replacement Alcove Fit: Replacing a bath with a shower tray? Do not assume your old bath size matches your new tray area. You should measure the exact width and length of your available space. Include all tiled surfaces in your measurements.
Waste Position along Long Spans: You should check whether the tray's drain hole sits in the centre, corner, or end of the base. Additionally, confirm under your floorboards that the waste trap won't align directly over a timber joist.
Long-Wall Straightness: Ensure long back walls are straight over the full 1200mm–1800mm span. It is particularly important to check because bowed walls can leave gaps behind your tray edge or glass enclosure profiles.
Enclosure Door Access Direction: Confirm whether your glass door (like a sliding door or walk-in screen) mounts along the long front edge or short side panel for a watertight setup.
To cross-check your measurements and plumbing layouts before placing an order, take a look at our detailed Shower Tray Buying Guide.
Which tray material and finish suits your project?
Instead of looking at materials in isolation, match the build of the tray directly to what matters most for your installation:
Pearlstone: Ideal if you want a lightweight tray that is easy to handle during installation without giving up structural strength. Made from a stone resin matrix with a smooth white acrylic top, it stays warm underfoot and is simple to keep clean.
Slate Effect: Best if visual impact and contemporary texture are top priorities. These stone bases feature realistic slate surfaces in white, grey, or black and come with matching waste grates for a sleek spa finish.
Stone Resin: Perfect if you prefer a solid, heavy-duty feel underfoot with maximum rigidity that will never flex over time.
Should you choose a low-profile tray or a leg riser kit?
Deciding how to mount your shower tray comes down to how your waste pipes are routed:
Low-Profile Trays: If your plumbing runs underneath floorboards or inside a concrete screed, a 40mm low-profile base sits flat for a clean, step-free look.
Leg Riser Kits: If your waste pipes run above floor level, adding a leg riser kit lifts the shower tray off the ground. Clip-on aprons hide the pipework while keeping it easy to access if you ever need maintenance.
Which shower door styles work best on a rectangular tray?
An elongated base pairs well with several enclosure setups depending on your room clearance:
Sliding Shower Doors: If floor space outside the shower is tight, sliding doors glide smoothly inside the frame. Browse compatible options in our Sliding Shower Doors section.
Walk-In Glass Panels: If you prefer an open, door-free setup, pairing a long 1400mm+ base with a single glass screen creates a sleek walk-in shower.
Pivot & Hinged Doors: If you have plenty of open floor space in front of the shower, outward-opening doors offer a wide, comfortable entrance.
How do you fit and care for a rectangular shower tray?
A great installation starts with a flat, level foundation. Whether you are setting the tray on a mortar bed or a riser frame, making sure it is perfectly level prevents water pooling and edge leaks. Always test your waste trap for leaks before sealing the edges with sanitary silicone.