Wood Fired Hot Tub Kit or Pre-Assembled: Which Should You Buy?

A wood fired hot tub kit is a wood burning tub delivered as parts: cedar staves or panels, bands, a floor, a stove and a chimney, assembled on site by you or a carpenter over a day or two, then filled and left to swell until it seals. A pre-assembled tub arrives as a tub, rolls into position, and is heating water the same afternoon. The kit is usually cheaper on the invoice. Whether it is cheaper to own depends on what your time, your skills and the next ten years are worth.

Here is what each actually involves, so the comparison is between the whole of one and the whole of the other.

What a hot tub kit involves

Most cedar hot tub kits are stave-built: vertical boards that fit a groove in a wooden floor and are drawn tight by steel bands. Assembly means levelling a base, setting the floor, standing each stave, fitting and tensioning the bands evenly, seating the stove and chimney, fitting benches, and then filling the tub and waiting. New staves leak on the first fill, sometimes for days, until the wood absorbs enough water to swell against its neighbors. Bands are re-tightened as it settles. A carpenter can do this cleanly; a first-timer can too, with a manual and patience, and the result depends on the fit.

What you save is the labor of building it, and the freight is lighter because it ships flat. What you take on is the assembly, the swelling period, the responsibility if a joint weeps, and an all-wood structure that has to stay full to stay sealed. Wooden hot tubs: what to know before you buy covers what that means over time.

What a pre-assembled tub involves

An AlumiTub is built, riveted and pressure-tested with water in the shop on the Sunshine Coast before it ships. It arrives crated, travels on its side at 38 inches, and two people roll it into place at 200 lbs empty on the Small, 220 on the Standard and 300 on the Large. On a prepared site the setup is about an hour: wrap the insulation, band the cedar boards around the aluminum structure, fit the chimney and thermometer, fill, light. There is no swelling period because the cedar is cladding and the riveted marine-grade aluminum structure is what holds the water. It sealed at the factory and was tested there.

What you pay for is a finished thing with a 25 year structural warranty that covers the vessel someone else built. What you give up is the project, if the project was part of the appeal.

How to prepare for arrival covers what the site needs and the wait.

Side by side

	Wood fired hot tub kit	Pre-assembled AlumiTub
Arrives as	Parts, shipped flat	A finished tub, crated on a pallet
Time to first soak	A day or two of assembly, then days of swelling	About an hour on a prepared site
Skills needed	Carpentry, or a carpenter	Two people and a ratchet strap
What holds the water	The swollen staves	A riveted marine-grade aluminum structure
Can be left empty	No, it dries and leaks	Yes, for a weekend or a winter
Insulation	Usually none in the walls	360 degrees, plus the base and a floating layer
Can be moved later	Disassemble and rebuild	Roll it
If it leaks	Yours to find and fix	Structural warranty, 25 years
Upfront cost	Lower	Higher

Who should buy a kit

Someone who wants the build as much as the tub, has the skills or the carpenter, will keep it full year round, and accepts that an all-wood tub is a living thing that asks for attention. There is real satisfaction in it, and for a mild-climate garden that gets used every week it can work well for years.

Who should buy pre-assembled

Anyone at a cabin, an island, a rental or a cold climate, where the tub will sit empty between visits or face a hard freeze. Anyone who would rather the first weekend was a soak than a build. And anyone for whom the number that matters is the cost across twenty years rather than the invoice, because a vessel that does not depend on wood swelling is the reason the earliest AlumiTubs, built from 2001, are still in use.

Sizes, heating options and lead times are on the Wood Fired page.

Common questions

What comes in a wood fired hot tub kit?

Typically cedar staves or panels, a wooden floor, steel bands, benches, a stove and chimney, and instructions. It is assembled on site over a day or two, then filled and left to swell until the staves seal against each other, which can take days.

Is a hot tub kit cheaper than a pre-assembled tub?

Usually on the invoice, because you supply the labor and it ships flat. Across years of ownership the picture changes: a kit is an all-wood tub that must stay full and is yours to fix if it leaks, while a pre-assembled aluminum-structured tub can be left empty and carries a 25 year structural warranty.

How hard is it to assemble a cedar hot tub kit?

Manageable for a careful first-timer with a manual, straightforward for a carpenter. The difficult part is not the assembly but the settling: new staves leak until they swell, bands need re-tensioning, and the fit determines whether it seals cleanly.

How long does a pre-assembled hot tub take to set up?

About an hour on a prepared site. An AlumiTub arrives built and pressure-tested, rolls into position by two people, and needs only the insulation wrapped, the cedar banded, the chimney fitted and the tub filled before the fire is lit.