Garage Sauna: The Ultimate Guide to Building Your Sauna

Saunas have been around for centuries, providing numerous health benefits to those who use them.

In recent years, garage saunas have become increasingly popular, allowing people to enjoy the benefits of a sauna in the comfort of their home.

In this article, we will guide you through the process of building your own garage sauna, from planning and preparation to construction and maintenance.

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Benefits of Saunas

Saunas offer a range of health benefits, including improved circulation, detoxification, stress relief, and pain relief.

Regular sauna use can also improve cardiovascular health, boost the immune system, and promote better sleep.

In addition to the physical benefits, saunas also provide a space for relaxation and meditation, which can improve mental health and overall well-being.

Garage Sauna: The Ultimate Guide to Building Your Sauna

Planning Your Garage Sauna

Before you begin building your garage sauna, there are several key factors to consider.

Selecting the Right Location

The first step in planning your garage sauna is selecting the right location.

You will need a space that is large enough to accommodate your sauna and has adequate ventilation.

It would be best if you also considered factors such as privacy, accessibility, and proximity to your home's electrical and plumbing systems.

Garage Sauna: The Ultimate Guide to Building Your Sauna

Designing the Layout

Once you have selected the location for your garage sauna, you can begin designing the layout.

The layout should include a changing area, shower, and sauna room.

You should also consider the placement of windows, doors, and ventilation systems to ensure proper air circulation and temperature control.

Choosing the Right Materials

When building your garage sauna, it is important to choose the right materials.

The walls and ceiling should be insulated to retain heat and prevent moisture buildup.

You should also select materials that can withstand high temperatures and humidity, such as cedar or hemlock wood.

Types of Garage Saunas

Traditional saunas

Traditional saunas, also known as Finnish saunas, use a heater and rocks to produce steam. These saunas can reach temperatures between 150°F and 200°F, and require a dedicated power source.

Infrared saunas

Infrared saunas use infrared light to heat your body directly, rather than heating the surrounding air. They typically operate at lower temperatures (around 120°F to 140°F) and have lower power requirements than traditional saunas.

Planning and Designing Your Garage Sauna

Space requirements

Before building a garage sauna, it's important to determine how much space you have available. Measure the area of your garage to ensure you have enough room to accommodate the sauna and allow for proper air circulation.


Proper ventilation is essential for maintaining a healthy sauna environment. Your garage sauna will need an exhaust fan or vent to release excess heat and humidity.


Insulating your garage sauna will help maintain the desired temperature, conserve energy, and prevent heat loss. Be sure to use appropriate insulation materials, such as mineral wool or rigid foam.

Electrical requirements

Your garage sauna will need a dedicated electrical circuit to handle the power demands of the heater or infrared panels. Consult with an electrician to ensure your garage's electrical system can safely support your sauna.

Building Your Garage Sauna

DIY vs. hiring a professional

Building a garage sauna can be a DIY project if you're handy with tools and have some construction experience. However, hiring a professional may be a better option if you're not comfortable with the technical aspects of building a sauna, such as electrical work or proper insulation installation.

Pre-fabricated sauna kits

One option for building a garage sauna is to purchase a pre-fabricated sauna kit. These kits come with all the necessary components and instructions, making the assembly process easier and more straightforward. They're available in a variety of sizes and styles, allowing you to choose the one that best fits your garage and personal preferences.

Building a Custom-built sauna

For a more personalized sauna experience, you can opt for a custom-built garage sauna. This option allows you to tailor the sauna's design, materials, and features to your exact specifications. A custom-built sauna will likely require the expertise of a professional contractor or sauna specialist.

Framing and Insulating

The first step in building your garage sauna is framing and insulating the walls and ceiling. You should use insulation materials that are specifically designed for saunas, such as mineral wool or fiberglass. The walls should be lined with cedar or hemlock wood to prevent moisture buildup and provide a pleasant aroma.

Installing the Sauna Heater

The sauna heater is the heart of your garage sauna, providing heat and steam to create a relaxing and therapeutic environment. You should choose a sauna heater that is appropriately sized for your sauna room and has the necessary safety features, such as a built-in thermostat and timer.

Building the Benches and Flooring

The benches and flooring of your garage sauna should be made from materials that can withstand high temperatures and humidity. Cedar or hemlock wood are excellent materials for these components, as they are both durable and resistant to moisture. You should also ensure that the benches are comfortable and provide adequate space for lying down or sitting.

Sauna Maintenance and Care

Maintaining and caring for your garage sauna is essential to ensure its longevity and continued use. Here are some tips for keeping your sauna in top condition:

Cleaning and Sanitizing

Regular cleaning and sanitizing of your garage sauna is essential to prevent the buildup of bacteria and mold. You should wipe down the benches, walls, and flooring with a mild disinfectant after each use, and deep clean the sauna at least once a month.

Replacing Sauna Stones

Sauna stones are an integral part of the sauna experience, as they absorb and distribute heat throughout the room. Over time, sauna stones can become damaged or worn, and should be replaced as needed to ensure the efficiency of your sauna heater.

Monitoring and Adjusting Temperature and Humidity Levels

Maintaining the proper temperature and humidity levels in your garage sauna is essential for both comfort and safety. You should monitor the temperature and humidity levels regularly, and adjust them as needed to ensure a comfortable and relaxing experience.


Building your own garage sauna is a rewarding and fulfilling experience that provides numerous health benefits. By following these steps and tips, you can create a space for relaxation and wellness in the comfort of your own home. Remember to maintain and care for your sauna regularly to ensure its longevity and continued use.


1. Can I convert my existing garage into a sauna?

Yes, you can convert an existing garage into a sauna. However, you'll need to consider factors such as space, ventilation, insulation, and electrical requirements to ensure a safe and functional sauna.

2. How much does it cost to build a garage sauna?

The cost of building a garage sauna can vary greatly depending on factors like the type of sauna, size, materials, and whether you choose a DIY or professional installation. Pre-fabricated sauna kits can range from $2,000 to $10,000, while custom-built saunas may cost upwards of $10,000.

3. How long does it take to heat up a garage sauna?

The time it takes for a garage sauna to heat up depends on the type of sauna and the power of the heater or infrared panels. Traditional saunas can take 30 minutes to an hour to reach optimal temperature, while infrared saunas typically heat up more quickly, within 10-20 minutes.

4. Do I need a special type of flooring for my garage sauna?

Yes, it's important to choose a flooring material that can withstand the heat and humidity of a sauna. Options include waterproof tiles, specially treated wood, or a combination of both.

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