Custom Indoor Sauna Room Kit - 4' x 4' x 8'

Custom Indoor Sauna Room Kit - 4' x 4' x 8'

Transform your home into a wellness retreat with the Finnish Saunas  Custom Indoor Sauna Room Kit. This complete sauna package includes everything you need to build an authentic Finnish sauna experience, whether you're a DIY enthusiast or a professional contractor.

Complete Sauna Kit - Ready for Your Space

Our custom indoor sauna kit arrives with all interior components precisely cut and tailored to your room dimensions. Simply provide the framing, insulation, electrical wiring, and exterior wall covering—we supply the rest. Building your dream sauna has never been easier or more affordable.

Select from three exceptional wood types, each offering distinctive benefits for your sauna interior:

Grade A Knot-Free Western Red Cedar

The classic choice for sauna enthusiasts. This premium softwood remains comfortably cool to the touch during sauna sessions and naturally resists moisture and decay. Enjoy its refined, knot-free appearance with beautiful color variations ranging from reddish to pinkish-brown, accented by darker bands and pale sapwood streaks.

Thermo Aspen/Alder

Experience the luxury of intense thermally modified wood, heat-treated at 419°F or higher. This advanced process creates a stunning, deep, rich color while dramatically enhancing durability and dimensional stability. Perfect for those seeking a modern, sophisticated aesthetic with superior performance. Suitable for both indoor and outdoor applications.

Thermo Poplar

A thermally modified wood treated at approximately 374°F for optimal indoor sauna use. This medium modification delivers enhanced dimensional stability, improved resistance to humidity and temperature fluctuations, and a warm, rich tone—all achieved through a chemical-free process. Ideal for creating a naturally beautiful, long-lasting sauna environment.

Customizable Bench Configurations

Choose the bench layout that best fits your space and needs from the configurations shown in the product images. Each configuration is designed to maximize comfort and optimize your sauna experience.

What's Included in Your Custom Sauna Kit:

• Foil vapor barrier for proper moisture protection
• Ergonomic backrests for comfortable relaxation
• 1×4 tongue & groove boards (walls & ceiling) in your selected wood
• Clear 1×4 bench boards with supports (20″ deep) in matching wood—custom-built to your chosen configuration
• Corner moldings for walls, ceiling, and baseboards (matching wood)
• All-glass sauna door with wood handles and trim
  • Frame: 27.2″ × 78.7″ (690 × 2000 mm)
  • Glass: 24.4″ × 77.3″ (620 × 1963 mm)
  • Frame thickness: 1.65″ × 3.6″ (42 × 92 mm)
  • Rough opening required: 28″ × 80″
• Duckboard flooring for the walk area (matching wood)
• Upper and lower vent grills for proper air circulation
• Traditional sauna bucket with liner and ladle
• Sauna thermometer for temperature monitoring
• Comfortable headrest
• Marine-grade, wall-mount, vapor-proof sauna light
• Detailed installation instructions for easy assembly

Important Installation Notes:

• Recommended ceiling height is 8 feet per the manufacturer's safety and clearance guidelines. For custom ceiling heights, please contact our support team.