What this covers
A home sauna can be a room built into a basement or bath, a prefabricated indoor cabinet, or an outdoor barrel or cabin on a level pad. The company sizes the heater to the room volume, plans a dedicated circuit with a licensed electrician, and lays out intake and exhaust vents so air moves through the room. Indoor rooms are insulated and lined with a foil vapor barrier, then finished in a softwood such as cedar, with benches fastened from below so no metal is exposed. Outdoor saunas need a firm, level base and a weather-tight roof.
When to call
- A basement, bath or spare room with space for a small sauna.
- A backyard where you want an outdoor barrel or cabin sauna.
- An older sauna with a failing heater, damp walls or poor airflow.
What to expect
- PlanLocation, size, indoor or outdoor, and heater type are chosen.
- PrepareThe base, framing, insulation and vapor barrier go in, and the circuit is run.
- BuildWood lining, benches, door, vents and heater are installed.
- CheckThe heater and controls are tested and the installation is inspected where required.
Get a certified company
Look up a certified company by ZIP code. Every company's license, insurance and trades are verified before it is listed, and placement is never paid.
Questions people ask
What size heater does a sauna need?
It depends on the room volume, the insulation and how much glass there is. The heater maker's sizing chart is the guide.
Why does a sauna need ventilation?
Moving air keeps the heat even, clears moisture and makes the room comfortable to breathe in. Intake low near the heater and exhaust high or under the bench is a common layout.
Can a sauna go in a basement?
Often, yes, if there is room for the heater clearances, a dedicated circuit and a vapor barrier. Basements are a common spot for indoor saunas.
Related: Wine cellar construction · Tile shower installation · Basement finishing · All specialty interiors
This page describes what the service involves. The company you hire sets the scope, the schedule and the price, and your contract is with that company. We verify credentials and collect reviews from real jobs. We do not guarantee any company's workmanship. Safety steps are general guidance. When in doubt, leave the home and call 911.