Start With What Is Under the Floor

Before you fall in love with a roll-top bath in a showroom, spend an hour in the room itself working out where water has to go. In a period property the waste run dictates more decisions than the tile choice ever will. A bath needs a 40mm waste pipe with a decent fall, ideally 18mm per metre or better, and a basin needs 32mm. If the room sits above a kitchen or a hallway you have somewhere to run them; if it is over a solid floor or a downstairs parlour with a lath-and-plaster ceiling you like, you need a different plan.

Two other things worth checking early:

• Where the soil stack runs, and whether it is cast iron that can be reconnected or plastic that will need disguising.
• The direction and size of the floor joists, particularly if you are set on cast iron.

Old walls are rarely plumb and floors are rarely level. That is not a problem, but it does mean measure the room in three places before ordering anything, and leave yourself a tolerance of 15–20mm on any bath or vanity that sits against a wall.

Choosing a Bath That Suits the Room

A genuine cast iron bath is the thing most people picture, and it earns its place: it holds heat for far longer than acrylic and it looks right in a Georgian or Victorian room. But a filled cast iron bath with a person in it can weigh the better part of half a tonne. If the joists are old, undersized, or have been notched by a century of plumbers, get them assessed and consider sistering them before you commit.

Acrylic and stone-resin roll-tops are lighter and warmer to the touch, and modern stone-resin versions are convincing at a glance. Shapes matter as much as material:

• Single-ended — sloped at one end, taps usually at the other. Good for a narrow room where you bathe facing one way.
• Double-ended — symmetrical, taps in the centre. Best for two people, and often the classic look.
• Slipper — one raised, rolled end. Beautiful, but it needs floor space around it or it feels cramped.

Think about taps before you buy. Floor-mounted freestanding taps look superb but are fixed, so measure the reach carefully. Wall-mounted or deck-mounted mixers are more forgiving. If the bath is going under a sloped ceiling or a window, check head clearance for anyone tall.

Pedestal Basins and Concealing Pipework

The pedestal basin is the neatest way to hide a modern trap in a period bathroom. Choose a basin and pedestal designed as a pair, because a mismatched pedestal will not swallow a bottle trap. Where the pedestal cannot hide everything, a small boxed section in tongue-and-groove or painted MDF, finished to match the panelling, reads as original joinery rather than a compromise.

A few practical rules:

• Fit an accessible isolation valve on both hot and cold feeds, positioned so you can reach it without dismantling the pedestal.
• Use a shallow or low-profile trap where the waste run is tight, and check the fall before tiling.
• If the soil pipe is boxed in, run it as a proper stud frame rather than a token casing, and consider an access panel for the future.

Chrome or nickel traps, left on show beneath a basin or a freestanding bath, can look deliberate and handsome. Pretending there is no plumbing at all is often less convincing than letting a well-chosen bit of it be seen.

Tiles, Panelling and Surfaces

Period tiles are where a bathroom either sings or looks like a themed hotel. Victorian geometric and encaustic floor tiles are the classic choice for a hallway-adjacent bathroom or a ground-floor cloakroom, and plain glazed field tiles in white, cream or a soft sage work beautifully on walls with a simple border or dado.

Run tiles to a sensible height rather than tiling everything. A half-height tiled or panelled wall above a basin protects the plaster and looks more in keeping than full-height gloss. If the walls are lime plaster and the house is old and breathable, think carefully before tanking the whole room in cement-based adhesive and grout — that can trap moisture and push damp elsewhere.

For floors, honest materials suit old houses: quarry tiles, stone, or timber with a good seal, with underfloor heating as an option if the joists and budget allow. Warm floors make a cold period room genuinely usable.

Ventilation and Building Regulations

This is the part people leave until last and then regret. A bathroom in a period property without adequate ventilation will grow mould on the coldest wall within a couple of winters, no matter how beautiful the tiles are.

In England and Wales, Approved Document F sets the expectations. As a working rule:

• An intermittent extract fan in a bathroom should shift at least 15 litres per second, and be ducted to outside, not into a loft.
• A continuous running fan needs around 8 litres per second, with a boost setting.
• Background ventilation, such as a trickle vent or an openable window, matters alongside the fan.

Ducting matters as much as the fan. A short, straight run to an external wall beats a long, bendy one every time. If you must go through a listed or conservation-sensitive wall, speak to the local authority early. In Scotland, Northern Ireland and Wales there are variations, so check the current rules for your nation before you buy the fan.

A heated towel rail, a well-sealed shower screen and a habit of leaving the window ajar after a bath all help. But the fan is the thing that actually does the work.

The Details That Make It Convincing

Small choices carry a lot of weight. A high-level cistern with a chrome pull, a chunky timber or cast iron radiator, brass or aged-brass taps rather than polished chrome, and a proper mirror with a plain frame will do more for the room than an expensive tile. Keep the lighting soft and layered — a wall light either side of the mirror and a dimmable ceiling light — and avoid downlights punched into a lath-and-plaster ceiling unless you genuinely need them.

Finally, take your time over the sequence. First fix the plumbing and wiring, then board and plaster, then tile, then fit. It is dull advice, but in a period bathroom the order of work is what separates a room that looks effortless from one that fights itself.