What Is in a Cabin Kit Box and What Is Not

What is in the box

Most sauna kit boxes follow a similar structure. The core is the cabin shell: wall panels, ceiling panels, and a floor. The panels are usually tongue-and-groove wood (cedar, hemlock, or spruce) cut to size, with grooves that fit together. The floor may be a duckboard-style slat floor or a solid panel depending on the kit.

Benches are almost always included. A typical kit ships with two levels of benches in an L-shape or straight run, plus the support legs and fasteners. Some kits include a backrest; others sell it as an add-on.

The door is included: a glass door with a wood frame, hinges, a handle, and a magnetic or mechanical latch. Kits also include interior and exterior trim pieces to cover the seams and corners.

If the kit includes an electric heater, the box will contain the heater unit, a controller (wall-mounted or remote), temperature sensor, and the rock basket or guard rail. Sauna rocks may be included or sold separately; the kit's spec sheet will say which.

Fasteners, screws, nails, and assembly brackets are included. You may need a rubber mallet and a level, but the kit assumes you have basic tools.

Some kits include a vapor barrier or foil facing on the interior of the wall panels. Others expect you to add it in the room where the sauna is installed. Check the product description or the manufacturer's FAQ before assuming it is included.

You will not find lighting in the box unless the kit explicitly says so. Many sauna lights, including chromotherapy LED kits, are separate accessories. The same is true for a thermometer, hygrometer, bucket, ladle, and backrest cushions.

For full details on what makes a kit different from a pre-built cabin, see what is a sauna kit.

What you buy separately

The items you buy separately fall into two groups: installation parts and accessories.

For installation, you will often need a foundation or leveling base. For outdoor kits, the roof is sometimes included, but for many compact cabins you buy the roof as an add-on, and you must build a level pad, gravel base, or deck yourself. For indoor kits, you need flooring under the sauna (tile or concrete are recommended by many manufacturers for traditional saunas) and a way to level the cabin.

Electrical work is always separate. A hardwired heater needs a dedicated circuit, a disconnect or breaker, and wiring sized to the heater's amperage. The heater kit includes the unit and controller, but not the wire, breaker, or box. See dedicated circuit for sauna for what an electrician handles.

Ventilation supplies are usually separate: an intake vent near the floor and an exhaust vent near the ceiling. Kits often have cutouts or knockouts, but the vent grilles themselves may not be included.

Accessories are almost never in the box. A bucket and ladle, a sauna thermometer, a hygrometer, a sand timer, and backrest pads or headrests are all purchased separately. The same goes for towels, sauna hats, and any aroma or essential oil accessories.

For a full list of what to budget for beyond the kit, see hidden costs of installing a sauna.

Heater included or not

Some kits ship with the heater, some without. If the kit includes a heater, the box will specify the kilowatt rating (for example, 4.5 kW, 6 kW, or higher). The rating must match the room's cubic footage for the heater to work well. See how to size a sauna heater by cubic feet for the rule.

If the heater is not included, you choose one separately based on the volume of the cabin. Kits without heaters are often cheaper up front, but let you pick a heater from a brand you trust. The kit's cutout for the heater is standardized, but you should confirm the dimensions with the manufacturer's spec sheet.

Rock quantity also varies. A kit with an integrated heater may include a bag of sauna stones; if not, you buy stones by the pound from a sauna supplier. The heater's stone capacity is listed in its manual. See how many stones a heater holds.

Assembly: what arrives and what you need

Most kits arrive in one or two large boxes or on a pallet. The panels are numbered and labeled, and the instruction manual shows the assembly order. You will need a level, a rubber mallet or dead-blow hammer, a drill/driver, a tape measure, and a ladder.

The kit includes the screws and brackets for joining panels, but not construction adhesive or sealant (unless stated). Some kits use clips or cam locks; those are included.

If the kit includes a door pre-hung in a frame, you install it by attaching the frame to the wall panels. If the door ships flat and you assemble the frame, the hinge screws and handle are included.

For outdoor kits, roofing felt or shingles, gutters, and flashing are usually not included. Even if the frame roof is in the box, the waterproof membrane and finish are your responsibility. See outdoor sauna roof types.

If you are assembling in a garage or basement, ensure you have enough ceiling clearance and a clear path for the panels. See garage or basement sauna.

Read the parts list before ordering

The most reliable way to know what is in your kit is the manufacturer's own spec sheet or assembly manual. Look for a list of included components or a box contents drawing.

Pay attention to three points: whether the heater is in the box, whether the floor is slatted or solid, and whether a vapor barrier or interior foil is present. Each of these changes what you need to buy.

Also check whether the door is glass or wood. Most kits use tempered glass, and some have a magnetic seal. A wood door is quieter but lets in less light.

When you compare kits, use the spec sheet as the source of truth rather than a retailer's summary. See sauna kit vs prebuilt cabin for a comparison of the two.

If you are not sure a component is included, ask the seller before paying. Photographs in listings may show optional accessories that are not in the box.

What to pick for your use

Questions

Does a sauna kit include the heater?

Sometimes. Some kits ship with an electric heater, rocks, and a guard rail; others do not. Check the kit's parts list or ask the seller. If the heater is not included, choose a heater that matches the cabin's cubic footage.

Does a sauna kit include the door?

Yes, nearly all kits include a door with glass, hinges, a handle, and a latch. The door may be pre-hung or require assembly. Confirm the glass type is tempered if that matters to you.

Do sauna kits include rocks?

Some do, some do not. When included, the rocks are usually loose stones meant to be stacked on or in the heater. If not, buy sauna stones separately and confirm the heater's stone capacity.

What do I need to buy separately?

Common separate purchases are a foundation or leveling pad, roofing for outdoor units, electrical wiring and a breaker, lighting, a thermometer and hygrometer, and accessories such as a bucket, ladle, backrest pads, and towels.

Is the floor included in a sauna kit?

Yes, most kits include floor panels. They may be slatted duckboards or solid panels. For indoor installation, you may still want a floor covering such as tile or a waterproof mat beneath the cabin.

Can I assemble a kit without an electrician?

Cabin assembly requires basic tools and two people, but any hardwired heater installation must be done by a licensed electrician. You can assemble the cabin shell yourself and have the electrician connect the heater. See what electrician decides sauna install.