Complete DIY Sauna Room Kits

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DIY Sauna Kits — Build Your Own Sauna Room Complete DIY sauna room kits with everything you need to turn a framed, insulated space into a fully functional sauna. Choose from two kit lines: Finnish Sauna Builders pre-cut custom kits in 21 room sizes with three premium wood options and a Harvia heater included, or our cedar room liner kits in traditional electric and infrared configurations. Every kit ships free. Finnish Sauna Builders — Pre-Cut Custom Sauna Room Kits Finnish Sauna Builders kits are complete pre-cut sauna packages built to an 8-foot ceiling height — the proper height for authentic Finnish sauna performance with even heat distribution and good löyly (steam). Each kit includes all interior components precisely cut and tailored to your room dimensions: tongue-and-groove wall and ceiling boards, 20"-deep bench boards with supports in your choice of bench configuration, an all-glass sauna door with wood handles, ergonomic backrests, a headrest, duckboard flooring, foil vapor barrier, upper and lower vent grills, a marine-grade vapor-proof sauna light, a traditional sauna bucket with liner and ladle, a thermometer, and a Harvia heater with stones. You provide the framing, insulation, electrical wiring, and exterior wall covering. Available in 21 room sizes from 3'x4' up to 8'x9', each available in three wood types: Western Red Cedar — The classic sauna wood. Grade A, knot-free, naturally moisture- and decay-resistant, cool to the touch during sessions, with rich reddish-brown tones. Browse our full cedar sauna wood selection. Thermo Aspen / Alder — Thermally modified at 419°F+ for a deep, rich color with dramatically enhanced durability and dimensional stability. A modern, sophisticated look with superior performance indoors or outdoors. See our thermo-aspen and alder wood collections. Thermo Poplar — Thermally modified at approximately 374°F for improved dimensional stability and humidity resistance with a warm, rich tone. A chemical-free process that's id