Walk into almost any pre-1970s Canadian home and there's a decent chance the bathroom still has its original cast iron tub. These tubs were built to outlast the house — the iron shell essentially never wears out. What does wear out is the porcelain enamel on top: it dulls, stains, chips, and eventually rusts around the drain. That's when the question lands: refinish it, or wrestle it out and replace it? The honest answer depends on the tub's condition, whether it has been refinished before, and what else is happening in your bathroom. Here's the math, without the sales pitch from either camp.
What refinishing actually is (and isn't)
Refinishing — also called reglazing or resurfacing — is not new porcelain enamel. Real porcelain enamel is fused to the iron in a factory kiln at extreme temperatures, and nobody can recreate that process in your bathroom. What a refinisher applies is a sprayed coating, typically an epoxy- or urethane-based product, over a chemically etched and patched surface. Done properly, the tub looks glossy and near-new when the technician leaves.
The catch is longevity. A quality professional reglaze typically lasts somewhere between 5 and 15 years. Where you land in that range depends almost entirely on the quality of the surface prep and how the tub is treated afterward — abrasive cleaners, suction-cup bath mats, and a dripping tap will all shorten its life. Just as important: refinishing is a once-or-twice proposition. The first coating bonds to etched porcelain, which is a solid foundation. A second coating bonds to old coating, which is a much weaker one. Third attempts almost never end well.
The real cost math
The sticker on a new tub is only one line of the replacement bill. Here's what each quote actually contains.
| Refinish | Replace | |
|---|---|---|
| What you pay for | One visit from a refinishing pro; materials and labour | New tub, demolition, disposal, tile or surround repair, plumbing adjustments, installation |
| Disruption | Usually a single day, plus cure time before you can bathe | Days to weeks; part of the bathroom is a construction zone |
| Typical lifespan | 5–15 years, prep-dependent | Decades for a new cast iron or quality acrylic tub |
| Repeatable? | Once, maybe twice — results decline each time | Not applicable |
| Hidden costs | Aftercare rules; possible early failure if prep was poor | Surprises behind the wall once the old tub is out |
The heavy part is literal. A cast iron tub weighs several hundred pounds — enough that most are broken up with a sledgehammer right in the bathroom rather than carried out whole. That means demolition labour, disposal fees, floor protection for the rest of the house, and almost always some tile repair where the old tub met the wall. If the new tub is a different size or the drain lands in a different spot, add plumbing work on top. The result: a full replacement usually runs several times the cost of a single professional refinish, before you've even chosen the new tub. That gap is exactly why the refinishing industry exists.
When refinishing wins
- You have an original clawfoot or period tub. Genuine antique clawfoots have proportions, feet, and rolled rims that are hard to duplicate, and they suit older homes in a way nothing else quite does. Refinishing preserves the character; replacement erases it.
- The damage is cosmetic. Dull finish, staining, surface scratches, a few small chips — all textbook refinishing candidates.
- The tub has never been refinished before. First-time reglazes are the ones that reach the long end of the lifespan range.
- The rest of the bathroom is staying. If the tile, surround, and layout are fine, refinishing lets you skip the demolition entirely.
- The budget is tight. A good refinish beats a replacement you can't afford to do properly.
When replacement wins
- A previous reglaze is failing. Peeling, bubbling, or flaking means the old coating has to be chemically stripped before anyone can try again, and the second attempt still won't bond as well as the first did.
- There's rust-through or structural damage. A coating can hide surface rust; it cannot fix iron that has rusted through at the drain or overflow.
- You're renovating the room anyway. Once the walls are open and the tile is off, the marginal cost of swapping the tub drops dramatically. Refinishing a tired tub in the middle of a gut renovation is usually false economy.
- The tub itself is the problem. Too shallow for a proper soak, awkward to step over, or simply in the wrong place — no coating changes the shape of the tub or the layout of the room.
If you replace: new cast iron and the modern alternatives
Replacing an old cast iron tub doesn't have to mean giving up on cast iron. Cheviot still manufactures cast iron clawfoot and skirted tubs today, so you can keep the heat retention, the solidity, and the period look with a fresh factory porcelain enamel surface that will outlive any sprayed coating. The trade-offs haven't changed: serious weight to get up the stairs, and delivery logistics worth planning in advance.
If the weight puts you off, the modern alternatives are genuinely good. Quality acrylic tubs — from makers like Maax — are a fraction of the weight, warm to the touch, and far easier to install, especially on upper floors. At the premium end, stone-composite freestanding tubs such as those from Victoria + Albert deliver the sculptural look and much of the heat retention of cast iron at a manageable weight. You can compare styles across our freestanding bathtub collection, or stick with a classic three-wall install from the alcove bathtub range — and if you're going the clawfoot or freestanding route, remember the tub usually needs its own floor- or deck-mounted tub filler, which should be budgeted alongside it.
And if the tub decision is part of a bigger bathroom rethink, it pays to run the same honest math on the other fixtures: our wall-hung toilet cost guide breaks down another purchase where the install is a bigger share of the bill than the fixture, and the rest of our buying guides cover the toilets, tubs, and sinks that usually get replaced at the same time.
Frequently asked questions
How long does a refinished cast iron tub last?
A professional reglaze typically lasts 5 to 15 years. Surface prep is the biggest variable, followed by aftercare: skip abrasive cleaners and suction-cup mats, fix dripping taps promptly, and a good first-time reglaze can reach the top of that range. A rushed job over poor prep can start peeling within a couple of years.
Can a cast iron tub be refinished twice?
Usually once well, twice at most. A second reglaze requires stripping the first coating, and even then it bonds to a less ideal surface than the original porcelain. If a tub has already been reglazed twice, replacement is almost always the better use of the money.
How do you get an old cast iron tub out of a bathroom?
Most are broken into pieces with a sledgehammer right where they sit — a whole cast iron tub weighs several hundred pounds. Budget for demolition labour, disposal or scrap pickup, and repair of the tile and flooring around the old tub.
Is a new cast iron tub worth it over acrylic?
It depends on what you value. New cast iron (Cheviot is the notable maker still producing it) gives you unmatched durability, a factory enamel finish, and excellent heat retention, but it's heavy and costs more to ship and install. Acrylic is lighter, warmer to the touch, and easier on older floor structures. Stone-composite tubs split the difference for freestanding installs. Browse the full bathtub collection to compare materials side by side.