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A cozy modern wood GardenHouse24 USA Sauna Sirpa 90 Garden Room with a round window and glass doors sits in a serene garden

Sauna Sirpa 90 – Outdoor Sauna, 136 sq ft

SKU 9005360
Save $5,377.20
$32,263.20
$26,886.00
Freedom Room product specialist

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Lasts A Lifetime!

3 Year Warranty

Your Wellness Space, Just Steps Away

GardenHouse24 USA Sauna Sirpa 90 Garden Room is a stylish and functional outdoor structure made from high-quality Nordic spruce, offering 18.5 m² of total space with three defined areas, including a sauna room, changing room, and lounge area. With durable 70mm thick walls, excellent insulation, and a sleek design, it’s perfect for year-round relaxation, entertaining, or creating a private wellness retreat in your backyard.

What's Included?

  • DIY kit
  • Closed shell
  • Arrives in flatpack
  • Internal walls included
  • Doors & windows included
  • Roofing cover & rain gutters as an extra

Specifications

  • Indoor area: 135.63 ft²
  • Log profile: 3.54 in
  • Number of floors: 1
  • Number of rooms: 1
  • Base dimensions: 8.5 ft x 17.98 ft
  • Floor space 1 floor: 135.63 ft²
  • Floor Material: 1.1 in
  • Roof Type: Flat roof
  • Floor included: Yes
  • Wood type: Nordic spruce, massive logs
  • Ridge height: 8.66 ft
  • Roof area: 269.1 ft²
  • Eave Height: 8.14 ft
  • Sauna Room Benches Included: Yes
  • Doors Included: Yes
  • Windows Included: Yes
  • Roof Shingles Included: No
  • Roof Slope: 3.5°
  • Roof Material: Nordic spruce

Features

  • Spacious Layout: With 18.5 m² of space divided into three rooms, it offers plenty of room for lounging, changing, and enjoying the sauna experience.
  • Premium Nordic Spruce: Built from slow-grown Nordic spruce, it provides exceptional durability, natural insulation, and a sleek, modern look.
  • 70mm Thick Walls: The robust 70mm wall construction ensures strength, weather resistance, and excellent thermal efficiency.
  • Private Sauna Room: Includes a dedicated sauna space for relaxing heat sessions just steps from your back door.
  • Large Glass Doors: The double-glazed glass doors invite light in, create a seamless indoor-outdoor flow, and improve energy efficiency.
  • Easy Assembly Kit: Delivered as a DIY kit with pre-cut components and clear instructions, making setup straightforward.
  • Natural Ventilation Set: Designed with built-in air vents to maintain airflow and fresh air circulation throughout the space.

Internal Room

The Internal Room includes an assembly kit designed for easy installation inside a finished garden building. It features a sliding door and ceiling, creating a fully enclosed space.

The kit also comes with two solid 1.1-inch walls, a corner support beam, and all the necessary fixings, conveniently packed flat for transport.

Closet: 3.98 ft x 5.95 ft

Bathroom: 3.98 ft x 7.92 ft

Staining/Painting Treatment

Extend the life of your outdoor freedom room and protect it from environmental damage with premium wood treatment.

Benefits include:

  • Shields wood from rot, mold, and staining fungi
  • Guards against UV rays and rain
  • Prolongs the durability of wooden surfaces
  • Enhances appearance and makes cleaning easier

Recommended high-end wood staining products:

  • Cabot Australian Timber Oil – Known for deep penetration and rich, long-lasting color; ideal for decks, siding, and outdoor structures.
  • DEFY Extreme Wood Stain – A water-based, eco-friendly stain with high UV resistance and durable protection for harsh outdoor conditions.

Downloads

Why Choose Outdoor Freedom Rooms?

We use premium Nordic/Baltic Spruce

These softwoods thrive in the cold northern regions of Europe and grow more slowly than standard spruce, pine, or fir, resulting in 6 to 8 times more growth rings. Spruce features a finer grain and fewer, smaller knots than Pine, though both types are lightweight and easy to machine.

Comes with a 5-year anti-rot warranty

It includes a 5-year anti-rot warranty that begins the moment your order ships. This covers issues such as glass or hardware seal failures, wall log splitting, or faulty components.

Unloading is included in the delivery

Receive your new log house hassle-free, our delivery service handles the unloading at no extra cost.

Fast delivery for in-stock items

Have your freedom rooms delivered right to your doorstep! In-stock models arrive in 10–12 weeks.

About Garden House 24 Timber Garden Products

Born from a passion for precision craftsmanship, Garden House 24 brings decades of timber-building expertise to your backyard. What began as a small European workshop has grown into a trusted source for high-quality garden rooms, sheds, and cabins. Built to last and designed to inspire, our timber products combine durability with timeless style.

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