How to Buy a Bathtub
The Complete Buying Guide
A bathtub is a long-term decision. Chosen well, it becomes the calm center of the bathroom — the place a long day ends. This guide walks you through the choices in the order that matters, so the tub you pick fits your space, holds a warm soak, and looks like it was made for the room.
Measure your space and confirm the tub will fit through the doorway and sit safely on the floor. Pick an installation type — freestanding for a statement, alcove to save space. Choose a material: acrylic for warmth and value, solid surface or concrete for the deepest heat retention. Match the interior length to the tallest bather, aim for a soaking depth of 15 inches or more, and confirm your water heater can fill it. Then choose your faucet and finish to tie the room together.
Start here:
the 6 decisions
Every good bathtub purchase answers these questions, roughly in this order
- Step 1
Will it fit — and can my floor and plumbing support it?
Measure the space, the doorway, and the drain.
- Step 2
Which installation type suits my bathroom?
Freestanding, alcove, drop-in, or corner.
- Step 3
What material do I want?
Acrylic, concrete, or solid surface.
- Step 4
What size, shape, and depth are most comfortable?
Interior length, slipper shape, and soaking depth.
- Step 5
Do I want wellness features?
A deep soak, and overflow options.
- Step 6
How does it coordinate with the room?
Faucet type, finish, and overall silhouette.
Measure your space and plan the install
A tub can be difficult to install. Plan accordingly by following these 3 steps to prevent an expensive surprise.
-
55–72" tub range
Space and clearances
Measure the length, width, and height of the area the tub will occupy. A standard alcove opening is 60 inches long, but freestanding tubs range from roughly 55 to 40 inches — so leave room to walk around and to clean behind it. Also measure your doorways and hallways to ensure the tub can fit into your bathroom.
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500+ lb filled tub + bather
Floor support and weight
Water is heavy — about 8.3 pounds per gallon. A filled freestanding tub plus a bather can exceed 500 pounds, and a solid surface tub adds hundreds more before you add water. Most acrylic tubs are fine on a standard floor, but for a heavy stone or solid surface tub — especially on an upper floor — have a professional confirm the structure can carry the load.
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Water Volume heating capacity
Faucet, drain, and hot water
Decide how the tub will fill and drain before you buy. Freestanding tubs usually pair with a floor- or wall-mounted tub filler; alcove and drop-in tubs typically use a wall- or deck-mounted faucet. Confirm your drain location and rough-in, and check your water heater: a deep soaking tub needs enough hot water to fill it.
Note your drain position (left, right, or center) and whether the tub is reversible. Matching the tub's drain to your existing plumbing saves the most costly part of the installation.
Choose your installation type
Installation type shapes both the look of the room and the work involved. It is the first design decision most people make.
| Type | What it is | Best for | Install effort |
|---|---|---|---|
| Freestanding | A standalone tub that sits open in the room, finished on all sides. | A statement centerpiece and a spa-like feel. | Moderate |
| Alcove | installed between two or three walls, with or without a finished apron. | Small and standard baths; the most space-efficient. | Low–Moderate |
| Drop-In | A shell dropped into a built deck or platform. | A custom, built-in look with a tiled surround. | Moderate–High |
| Corner | Fits into a corner to reclaim floor space, typically follows alcove install. | Filling an awkward corner or a larger soak. | Moderate |
For most renovations the choice is between freestanding and alcove. Choose freestanding when the tub is meant to be the centerpiece and you have the floor space; choose alcove when you want to use space efficiently or pair the tub with a shower. Swiss Madison offers coordinated options across both, so the tub matches the rest of your fixtures rather than standing apart from them.
Choose your material
Material determines how warm the water stays, how the tub feels, how much it weighs, and how it ages. Here is how the common options compare.
| Material | Strengths | Trade-offs | Heat retention |
|---|---|---|---|
| Acrylic | Warm to the touch, durable, light, easy to repair, good value. | Fewer ultra-matte finish options than stone. | |
| Solid surface | Deep heat retention, a soft matte or gloss finish, a premium feel. | Heavier; a higher price point. | |
| Concrete | Sculptural, substantial feel with a matte texture and strong heat retention. | Heavier; may require additional support during installation. | |
| Fiberglass (FRP) | The lightest and most affordable option. | Less durable; can fade or flex over time. |
For most buyers, acrylic hits the balance of warmth, durability, and value that makes a tub easy to live with. If the soak itself is the priority — long baths that stay hot — a stone-solid surface or concrete tub holds heat longer and brings a soft, solid, spa-like feel, which is why it anchors Swiss Madison's Renew & Restore soaking collection.
Get the size, shape, and depth right
Interior length and fit
The number that matters most is interior length, not exterior — that is the space you actually stretch out in. As a rule, choose a tub whose interior comfortably fits the tallest regular bather; taller users are usually most comfortable in a tub 60 inches or longer inside.
Soaking depth
Soaking depth is the water depth to the overflow — the difference between a shallow bath and a true soak. Look for a water depth of about 15 inches or more for full-body immersion; dedicated soaking tubs go deeper still. If a deep soak is the goal, prioritize depth over length.
Shape
one raised, sloped end to recline against. A comfortable choice for one bather.
both ends raised with the drain in the middle, so two people can share or one can recline either way.
oval reads soft and sculptural; rectangular reads architectural and modern. Flat-bottom designs feel more stable underfoot.
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For a relaxing primary-bath soak, a freestanding tub around 60–67 inches long with 15+ inches of water depth suits most adults. For a compact or shared bath, a 60-inch alcove tub keeps the footprint efficient without giving up comfort.
Choose your wellness features
Features turn a bath into a ritual. Choose the ones that match how you want to unwind.
Deep soaking
an extra-deep basin for full-body immersion, so heat and pressure ease tension the way a shorter tub can't.
Overflow and drain options
an integrated overflow lets you fill deeper safely; a quality pop-up drain keeps the lines clean. and easy installation.
Coordinate the look
The last decision is how the tub ties the room together. Match the tub filler to your other fixtures — a floor-mounted filler completes a freestanding tub, while a wall- or deck-mounted faucet suits alcove and drop-in styles — and carry one finish across the faucet, drain, and nearby hardware. When the tub, vanity, faucets, and fixtures share a finish and a design language, the room reads as one intentional space.
This is where Swiss Madison is built to win: a premium, coordinated look at an attainable price. Because we design in New York and sell direct — without the traditional retail markup — you get an elevated, well-made tub and a bathroom that feels designed as a whole, without overpaying for a luxury name.
Installing your new tub
A tub replacement is more involved than a toilet swap, and freestanding and undermount installs are best handled by a professional. Whoever does the work, these steps keep it clean and leak-free:
Confirm the tub fits through every doorway and turn before delivery day.
Verify the floor can support the filled weight, especially for stone or cast-iron tubs and upper floors.
Dry-fit the tub to check the drain and faucet line up with your rough-in before final placement.
Set the tub level, and support the base as the manufacturer specifies so it never flexes.
Connect the drain and overflow with fresh seals, then test for leaks before closing in any surround.
Seal the tub-to-wall or tub-to-floor joint with 100% silicone caulk for a clean, watertight finish.
Bathtub terms, defined
- Soaking depth
- The water depth to the overflow — how deep you can actually soak. 15"+ allows full immersion.
- Interior length
- The usable length inside the tub, where you stretch out — more telling than exterior size.
- Slipper
- A raised, sloped end to recline against. Double slipper raises at both ends.
- Apron
- The finished front panel of an alcove tub that faces the room.
- Tub filler
- The faucet that fills the tub — floor-mounted, wall-mounted, or deck-mounted.
- Overflow
- A drain near the top that prevents overfilling and sets the maximum soak depth.
- Reversible drain
- A tub that can be installed with a left or right drain orientation to match you plumbing
Frequently Asked Questions:
What size bathtub do I need?
What is the best material for a bathtub?
How deep should a soaking tub be?
Freestanding vs. alcove — which is better?
Will my floor support a bathtub?
Do I need a special faucet for a freestanding tub?
Will my water heater fill a deep soaking tub?
Ready to find your tub?
You know your space, your installation type, your material, and the size, depth, and features that fit how you unwind. Now explore the Swiss Madison collection and find the tub that turns your bathroom into somewhere you want to linger.
