Napa · Sauna Builder Services
Cedar Tub Install
Western red cedar and Japanese-style soaking tubs set on level pads, heated by wood or electric, with insulated cedar covers and filtration sized for Napa well water, indoors, on decks or in the garden.
Wooden soaking tubs set up to hold water for decades
A cedar tub is a stave-built vessel held together by steel bands and by the wood itself swelling once it is wet. Getting one right comes down to a dead-level base, a heater that suits the site, and water treatment matched to whatever comes out of your tap. We set round and oval hot tubs and square ofuro-style soakers.
Most of the tubs we put in sit next to a sauna on a deck or gravel pad, and a few go indoors in a bathroom or spa room. Heat comes from a submerged wood stove, an external wood heater with a coil, or an electric heater with a pump and filter. Five hundred gallons weighs over two tons, so we strap the tub down, a lesson from the 2014 earthquake.
A tub often joins a bigger job. The same crew handles sauna installation, and when both share a pad we plan the drains and power once. If you want warm, wet heat indoors instead, look at our steam saunas. For the cold side, the cold plunge install page explains how a chilled unit compares with an unheated cedar tub in the shade.
Why owners hand us their tub projects
Wooden tubs are forgiving once they are set up and fussy before that. We have placed them on hillside decks, beside vineyard pools and in Old Town backyards. Hiring us gets you a hot tub install and sauna crew that checks the framing, the water and the fire rules before a single stave shows up on the truck.
- We check deck joists, beams and footings against the full filled weight before a tub goes up there.
- We test well water for hardness and iron, then size filtration and treatment to suit.
- We run drains to daylight, a dry well or the sewer, and keep them well away from septic fields.
- We install wood-fired heaters with the clearances and spark arrestors fire zones call for.
- We build or supply insulated cedar tub covers that hold heat and keep oak leaves out.
- We anchor tubs so a quake cannot walk a full vessel off its base.
When a wooden tub is the right choice
Cedar suits some properties better than an acrylic spa. These are the cases where we tend to recommend it.
You want a tub that belongs in the setting
An acrylic spa looks like an appliance beside a stone terrace or a vineyard view. Cedar weathers to silver and sits comfortably among oaks, olives and fieldstone, which is why so many estate owners along Highway 29 pick it.
You want heat with no wiring
A wood-fired tub needs no electrical service. On remote ag parcels, cabins out toward Lake Berryessa, or anywhere that goes dark during a public safety power shutoff, that independence is the whole appeal.
You are pairing it with a sauna
The Nordic routine alternates hot room, soak and cool air on the porch. A tub a few steps from the sauna door makes that routine easy.
You like a deep, upright soak
Japanese tubs are deeper and narrower than western hot tubs, so you sit upright with water at your shoulders. They fit a bathroom, a covered porch or a small courtyard where a six-person spa would crowd everything.
You want cold water through the summer
Up-valley afternoons past 100 degrees make a cool soak very attractive. An unheated cedar tub filled from a well stays fairly cool in shade, and with a small chiller added it holds whatever temperature you set.
Our tub installation sequence
Site check and water test
We look at the base, the delivery route and drainage, and take a water sample. Hard well water from Coombsville and up-valley wells scales heater coils fast, so softening or a sequestering treatment goes into the plan early.
Base and utilities
We pour or level a pad, or reinforce the deck, then run power for pumps and electric heaters and set the drain. Wood-fired tubs get a chimney height and clearance plan at this stage.
Assembly and first fill
Staves go together, bands get tightened and the tub is filled. New wood weeps for a few days as it swells, which is expected.
Heater, cover and handover
We fire the heater, balance the water and fit the cover. You get a care sheet on draining, cleaning and seasonal use, since a tub left empty through a dry summer shrinks and leaks when refilled.
Tub options we install
Choosing a cedar tub mostly comes down to shape, heat source, water care and the lid. These are the options we go through with each client.
Wood species
Western red cedar is the default for its rot resistance and scent. Alaskan yellow cedar and hinoki cypress turn up in Japanese tubs, and thermally modified spruce works for a tighter budget.
Japanese tubs
Square or round, deep and compact, often with a seat inside. We build them freestanding or sunk into a deck. Indoors we tie them to a floor drain over a waterproofed subfloor, often beside a steam shower for clients who want a full bath suite.
Heating systems
Submerged wood stoves heat fastest. External wood heaters keep the fire out of the water and away from bathers. Electric heaters with a pump suit town lots and hold temperature on a schedule.
Filtration and treatment
Cartridge filters, UV or ozone units, and scale control for hard water. Without them a wooden tub needs draining every week or two.
Cedar tub covers
Insulated cedar lids, hinged or in sections, cut overnight heat loss and keep out leaves and spring pollen. Vinyl-wrapped foam covers weigh less and cost less.
Steps, benches and chillers
Cedar steps and a wraparound bench make the tub easy to use. For cold soaking, a Penguin Chillers or BlueCube unit keeps the water at a set temperature all summer.
Pricing a cedar tub
Installed cedar tubs in Napa County usually run from about nine thousand dollars for a wood-fired tub on an existing level surface to thirty thousand or more for an electric Japanese soaker with filtration indoors. What moves the figure:
- Tub size, shape and wood species.
- Heater type, and whether power has to be brought to the spot.
- Base work, from a gravel pad to a reinforced deck.
- Water treatment for hard or iron-heavy well water.
- Covers, steps and surrounding decking.
- Indoor work such as waterproofing and a floor drain.
You get one written price covering tub, base and utilities after the site check. A sauna built at the same time shares the pad, trench and permits.
Frequently Asked Questions
Does a cedar tub leak?
A new tub, or one that has sat empty, weeps at the seams until the staves swell. That usually stops within a few days of filling. Keep it full, or at least damp, and the joints stay tight. If it still drips after a week, the bands need adjusting, and we come back for that at no charge on our installs.
Is wood-fired or electric better for a cedar hot tub?
Wood heats faster and needs no circuit, which suits rural parcels and shutoff days. Electric holds a steady temperature on a timer and works in town, where chimney smoke can bother neighbors.
How do I keep the water clean in a wooden tub?
Run a filter, use a sanitizer that is kind to wood such as a low chlorine dose or an ozone unit, and drain on a regular schedule. Hard well water around Napa will scale a heater coil, so a sequestering agent or softener earns its place. We set up a routine based on your water test.
Will my current deck carry a filled cedar tub?
Sometimes. A filled five-foot tub with two people in it weighs about two and a half tons, far more than most residential deck framing was designed to carry. We check the joists, beams and footings, then either reinforce the deck or give the tub its own pad.
What permits does a hot tub install need?
An electric tub needs an electrical permit for its circuit. Reinforcing a deck or building a new one may need a building permit, and a wood heater in a fire hazard zone draws a closer look. The rules differ between the City of Napa, the county and the up-valley towns, and we confirm them for your parcel.
See all FAQs on our FAQ page.
Planning cedar tub install in Napa?
Describe the space you have in mind and we will send a free written estimate with no obligation attached. Use the form or give us a call, and we will help you sort out what suits your site, your electrical service and your budget.
Or call us now: 707-723-1361