Barrel sauna assembly is a two person job done with ordinary hand and power tools. Dundalk Leisurecraft’s CT Harmony manual recommends 2 people and lists about a dozen common tools, and SaunaFin, a Dundalk dealer, says you can install a Dundalk barrel sauna “in as little as one day.” The base and the wiring are separate jobs. Below is the build in order, based on the manufacturer instructions rather than a hands on test. Your own manual wins if it differs.
Before you start: base, unboxing and inventory
Finish the base first: Dundalk asks for a level base with a slight slope to the back for drainage. Our outdoor sauna foundation guide covers pad options, sizing and cradle footings.
Almost Heaven’s tips for building your barrel sauna start once the pallet is unpacked, the boxes inspected and everything moved to the build spot. Both brands say to watch the assembly video first, and Dundalk asks you to read the entire manual.
Sort the staves and find the three with special jobs. In the CT Harmony assembly instructions, the bottom stave is convex on both edges, the top stave is concave on both edges, and a spacer stave is square on both sides. Check parts against the manual before the first screw. The SaunaFin barrel assembly instructions add one more rule: do not assemble the sauna when the wood is wet; let it dry out first.
Barrel sauna assembly time and crew
No source we opened gives an hour by hour schedule. What they do say:
- Crew: 2 people recommended (Dundalk Harmony manual and SaunaFin barrel instructions). Dundalk’s band step assumes a helper taps staves while you tighten.
- Time: SaunaFin’s Dundalk install guide says “as little as one day.” Its prefab FAQ says that if you follow the instructions carefully, you can expect to finish a barrel kit in a few hours.
- Plan separately for: the base, an optional shingle roof, a wood stove chimney and the electrical connection.
Tools for how to build a barrel sauna kit
| Tool | Dundalk CT Harmony manual | SaunaFin Dundalk install guide |
|---|---|---|
| Rubber mallet | Yes | Yes |
| Carpenter’s level | Yes | Yes |
| Tape measure | Yes | Yes |
| Cordless drill | Yes | Yes (power drill) |
| Carpenter’s hammer | Yes | Yes |
| 3/4 in wrench or nut driver bit | Yes | Yes (wrench) |
| Phillips bits | Yes, plus Robertson | Yes (screwdriver) |
| 2 in hole saw | Yes | Not listed |
| Step ladder | Yes | Not listed |
| Utility knife | Yes | Not listed |
| Carpenter’s square | Yes | Not listed |
Almost Heaven adds that a nail gun speeds up stave nailing, and Dundalk’s wood stove steps call for a jigsaw for the chimney hole.
Step by step: cradles, staves and end walls
1. Cradles and the bottom stave
For the CT Harmony, Dundalk says to place the 2 cradles on the base, center the bottom stave on them with the long part before the groove facing the front, and measure 12 in from the end of the stave to the edge of the cradle. Screw it down, check it is square, then add screws into each cradle corner. Overhang varies by model: SaunaFin says porch models need 26 in at the porch end and 5 in at the other, and Almost Heaven recommends about 5 in front and back on its saunas. Use the number in your manual.
2. First staves, door wall and back wall
Dundalk has you add 3 staves on each side of the bottom stave, then set the door wall in the front grooves and level it with the mallet. Repeat for the back wall, lay the top stave across to stabilize the frame, then fit the half moon panels with the bench supports facing inward.
3. Filling in the staves
Add staves a few at a time, alternating sides, and tap them tight with the mallet. Dundalk says to nail every second stave on the bottom if required and that nails are no longer needed past the midpoint. Almost Heaven goes further: nail every second or third stave, stop at the 3 and 9 o’clock positions, and use a strap or rope to hold the upper staves so the bands can cinch them. Both say to fit in every stave you can.
4. The top stave “V” fit
Near the top, Dundalk says to remove the top stave and use it to wedge against the last stave in a “V” shape. A gap means you add the spacer stave; staves too tight to settle (rare, per Dundalk) mean you trim the top stave 3/4 in from the flat edge on each piece. SaunaFin notes that running out of bolt thread before the bands are tight usually means you need the spacer.
Bands, floor, benches and door
Dundalk places the front and back bands 2 in from the edge all the way around, feeds the center band over and under, and keeps all fasteners at the same height. Snug them lightly, tap the staves even, then tighten while your helper keeps tapping. Dundalk says you cannot overtighten. For seasonal checks after the build, see the band section of our outdoor sauna winterizing guide.
Inside, Dundalk levels the flat floor, then screws the benches to their brackets tight against the walls. Door handles and the towel hook go on last.
Barrel sauna installation: roof, vents and heater mount
Roof. The optional asphalt shingle roof on the Harmony uses 6 triangle supports, ice and water shield and shingles. Dundalk warns not to hit the aluminum bands with roofing nails.
Vents. In its wood stove section, Dundalk drills a 2 in hole below the bench support on the back wall and another high on the front wall, drilling halfway from each side to avoid splintering. Our Dundalk Complete Sauna Vent Kit ($24) lists intake and exhaust covers with rotating wooden panels.
Electric heater. Dundalk measures the heater’s mounting holes, adds 6 in to the height, centers the heater between the benches on the back wall, and hangs it on two lag screws supplied with the heater before fitting the guard. Wash the stones, then break the sauna in on the highest setting for about 1 hour. The Harvia KIP Electric Heater is listed from $1,214 in 4.5, 6 and 8 kW.
The electrical hand off
Dundalk says all electrical connections must be made by a qualified licensed electrician, and its warranty text for heaters and accessories says skipping that voids the warranty. The Harmony manual also says not to use a G.F.I breaker. Give your electrician the heater manual and let them and your local code make the final call on wiring and protection.
Dundalk barrel saunas we carry
| Model | Seats (per listing) | Porch | Price from |
|---|---|---|---|
| CT Harmony | 2 to 4 | Not listed | $5,555.16 |
| CT Elation | 2 to 4 | Not listed | $6,976 |
| CT Tranquility | 6 to 8 | 45 cm | $5,654.62 |
| CT Serenity | 6 (title) | 45 cm | $6,158 |
| CT Serenity MP | 4 (title) | 45 cm | $8,006 |
| Tranquility MP | 6 (title) | 45 cm | $8,220 |
Prices are at the time of writing. For model differences, see Dundalk barrel saunas compared, browse all Dundalk Leisurecraft products, or start with our home sauna buying guide. If you have a health condition, check with your doctor before using a sauna.
Frequently asked questions
How long does barrel sauna assembly take?
SaunaFin says a Dundalk barrel sauna can be installed in as little as one day, and its FAQ says a few hours if you follow the instructions carefully. Plan separately for the base, roof, chimney and wiring.
How many people do I need to build a barrel sauna kit?
Dundalk and SaunaFin both recommend 2 people. The band tightening step expects one person tightening while another taps the staves.
Can I do the barrel sauna installation and wiring myself?
You can assemble the wood structure yourself, but Dundalk requires a licensed electrician for all electrical connections. Your electrician and local code decide the wiring details.
Questions about a kit, heater or roof option? Call us at 866-777-2590, Mon-Fri 9AM-6PM PST. Orders of $999 or more ship freight free (a $200 flat rate applies below that), and our return and refund policy has the details on returns.
