The ultimate mould prevention checklist for outdoor saunas.

If you love your outdoor sauna but hate the thought of mould, this blog is for you. We all want our saunas to be a clean and healthy sanctuary where we can relax and unwind. But sometimes, due to excess moisture and poor ventilation, mould can sneak in and ruin the experience. Regularly using an outdoor sauna has a host of health benefits, but these benefits can be reversed if the sauna isn’t maintained correctly and develops mould. 

Don't worry, though. UK Saunas is here to help you keep that from happening. Read on as we cover everything you need to know about stopping mould in its tracks. We'll share some easy-to-follow tips on mould prevention and keep your sauna in top shape.

Whether you're new to saunas or you've been enjoying yours for years, these tips will be super helpful. So, let's get started and make sure your outdoor sauna stays fresh and mould-free!

Do Outdoor Saunas Get Mouldy?

The short answer is yes, outdoor saunas can get mouldy. Understanding why this happens is key to preventing it.

Why Are Outdoor Saunas Prone to Mould?

Mould loves warm, damp environments, and unfortunately, saunas tick both boxes. After a steamy session, moisture lingers on the wood surfaces, creating an ideal breeding ground for mould and mildew.

Factors Contributing to Mould Growth in Outdoor Saunas:

  • Humidity and Moisture: Saunas, by their very nature, are humid. This high moisture content accelerates mould growth – especially in an outdoor setting where ventilation may be limited.
  • Lack of Ventilation: Outdoor saunas often have limited airflow compared to their indoor counterparts. Without proper ventilation, the damp air gets trapped inside, promoting mould growth.
  • Weather and Environment: Outdoor conditions like rain, snow and humidity can contribute to the moisture levels in and around your sauna, further encouraging mould.
  • Infrequent Use or Cleaning: If you don't use or clean your sauna regularly, moisture and organic materials like skin cells and oils can accumulate, feeding the mould spores.

The Importance of Regularly Cleaning Outdoor Saunas

Regular cleaning is not just about keeping your sauna looking good; it's crucial for mould prevention. Mould spores are always present in the air, but they only grow into a problem when they find the right conditions. By cleaning your sauna regularly, you eliminate these conditions and keep dreaded mould at bay.

Why regular cleaning matters:

Prevents Mould Growth

Regular cleaning removes the moisture and organic materials on which mould spores thrive. This is especially important in the warm, damp environment of an outdoor sauna.

Enhances Sauna Experience

A clean sauna is more inviting and provides a better relaxation experience. It’s about hygiene and comfort.

Extends the Life of Your Sauna

Mould can damage wood and other sauna materials over time. By keeping your outdoor sauna clean, you're also protecting your investment.

Recommended cleaning frequency:

  • After Each Use: Wipe down surfaces to remove moisture and body oils. Leave the door open for a while to air out the sauna.
  • Weekly: Conduct a more thorough cleaning, especially if your sauna sees frequent use. This includes sweeping or vacuuming the floor and wiping down all surfaces.
  • Monthly: Perform a deep clean. This may involve more intensive cleaning methods, which we will cover in detail in the next section.

Cleaning Outdoor Saunas: Step-by-Step Guide

Keeping your outdoor sauna clean is crucial for mould prevention. Here's an easy guide to get you started on effectively cleaning your sauna and keeping it in top condition.

Choosing the Right Cleaning Supplies

  • Safe Cleaning Products: Opt for mild detergents or sauna-specific cleaners that won’t harm the wood. Harsh chemicals can damage the sauna’s interior and also be incredibly harmful to your health when heated. However where mould has accumulated a mild bleach solution can be used, but must be rinsed thoroughly after use. 
  • Natural Alternatives: For an eco-friendly option, consider using a solution of white vinegar and water. It’s gentle, natural and effective in dealing with mildew and odours.

Cleaning Process:

Preparation:

  • Turn off the sauna and ensure it's cool before cleaning.
  • Remove any loose items like towels or sauna seats.

Sweeping or Vacuuming:

  • Start by sweeping or vacuuming the floor to remove dust and debris.

Wiping Down Surfaces:

  • Dip a soft cloth or sponge in your cleaning solution and wring it out well. The wood should be damp, not wet.
  • Gently wipe down the benches, walls and floor. Pay special attention to corners and crevices where mould is likely to grow.

Focus on High-Touch Areas:

  • Clean the door handles, control panels and any other surfaces that are touched frequently.

Rinsing:

  • If necessary, lightly rinse cleaned surfaces with a damp cloth. But avoid using too much water.

Drying:

  • Use a dry towel to wipe off any excess moisture.
  • Leave the sauna door open to air dry completely.

Checking and Cleaning the Heater:

  • If your sauna has a heater with stones, make sure to check and clean around it. Follow the manufacturer’s instructions for any specific cleaning guidelines.

Tips for Cleaning Sauna Benches, Floors and Heaters

  • Benches: For tough stains, you can lightly sand the wood. Always sand in the direction of the grain and treat the wood afterwards if needed.
  • Floors: Use a mild detergent and avoid excessive water to protect the wood.
  • Heaters: Be cautious around electrical components. Do not spray water directly on the heater.

Regular cleaning is a straightforward yet effective way to keep your outdoor sauna inviting and mould-free. Read on, because in the next sections, we'll look at how to improve ventilation and tackle mould removal if it does appear.

Ventilation and Humidity Control

Proper ventilation and humidity control are crucial in preventing mould in your outdoor sauna. These factors play a huge role in reducing moisture accumulation, which is the primary cause of mould growth.

Why ventilation matters

  • Reduces Moisture Build-up: Good airflow helps to dry out the sauna more quickly after use, reducing the chances of mould growth.
  • Improves Air Quality: Ventilation ensures a fresh air supply, which is not only healthier but also enhances the sauna experience.

Here are a few tips for improving air circulation:

Use Ventilation Features

Make use of any built-in ventilation systems or windows in your sauna. Keep them open during and after use to allow for air exchange.

Add External Ventilation

If your sauna doesn’t have adequate built-in ventilation, consider installing an external vent or an exhaust fan to help circulate air.

Regularly Air Out the Sauna

Even when not in use, it’s a good idea to periodically open the sauna door and windows to let fresh air circulate inside.

Humidity Control Methods:

  • Use a Hygrometer: This tool measures the humidity level inside your sauna. Aim to keep the humidity level low to discourage mould growth.
  • Dry the Sauna After Use: Mop up any standing water and leave the door open to aid in drying.
  • Consider a Dehumidifier: In particularly humid climates, using a small dehumidifier can help maintain a drier environment.

Mould Detection in Outdoor Saunas

Detecting mould as early as possible is the best way to prevent it from becoming a bigger, uncontrollable issue. Knowing what to look for and where to look can save you a lot of trouble down the line.

How to Spot Early Signs of Mould

Visual Inspection

Look for any black, green or white speckles or spots on the wood surfaces. Mould usually starts as specks and can grow into large patches over time.

Musty Smell

A musty or earthy odour is often a telltale sign of mould. If your sauna smells odd, it's time to inspect it more closely.

Allergic Reactions

If you or others start having allergic reactions like sneezing or itching when using the sauna, it could be due to mould spores.

Areas Prone to Mould Growth in Saunas:

  1. Corners and Crevices: These are areas where moisture can easily get trapped.
  2. Underneath Benches: A common spot for moisture accumulation.
  3. Near the Heater: If not properly ventilated, this area can remain damp.
  4. Floor and Lower Walls: These areas are more likely to be in contact with water.

As you probably know by now, it’s important to conduct regular inspections of these areas, especially if your sauna is frequently used or is in a humid environment. Early detection not only makes removal easier but also helps in maintaining the overall health and longevity of your sauna.

In the next part of our guide, we’ll explore safe and effective ways of mould removal if you happen to find it in your outdoor sauna.

Safe and Effective Mould Removal

If you find mould in your outdoor sauna, it's important to act quickly and safely to remove it. Here's how to tackle mould effectively.

Identifying Mould Types:

Different types of mould present different levels of risk. Common moulds in saunas include black mould, which can be particularly harmful, and white or green moulds, which are usually less dangerous but still need to be removed.

DIY Mould Removal Techniques:

Prepare the Area

  • Ensure the sauna is completely cool and unplugged.
  • Wear protective gloves and a mask to avoid inhaling spores.

Cleaning Solution

  • For light mould, a mixture of water and vinegar can be effective. For tougher mould, you might need a mildewcide or a solution specifically designed for saunas.

Scrubbing the Mould Away

  • Use a soft-bristle brush or sponge to gently scrub the mouldy areas. Avoid using abrasive tools that can damage the wood. Always wear a mask and keep the door open during this stage to keep from ingesting spores.

Rinsing and Drying

  • Wipe the area with a damp cloth to remove any residue.
  • Dry the area thoroughly with a towel and leave the sauna open to air dry.

Disposal

  • Dispose of any rags or sponges used to clean the mould to prevent cross-contamination.

When to Call a Professional

  • If the mould is widespread or you're dealing with a particularly dangerous type like black mould, it's safer to call a professional. They have the right equipment and expertise to handle the situation safely.

Post-Cleaning

  • Once the mould is removed, it's important to identify and address the cause to prevent it from returning. This might involve improving ventilation, adjusting humidity levels or changing cleaning routines. Just refer to the previous sections in this guide to help you. 

Our Final Thoughts on Mould Prevention and Sauna Care

So, remember, the key to a mould-free sauna is consistent care and maintenance. It’s not just about cleaning –  it’s about creating an environment where mould simply can’t thrive. Your efforts will not only prolong the life of your sauna but also enhance your sauna experience.
We hope this guide has equipped you with the knowledge and tools you need to keep your outdoor sauna in top condition. If you want to speak to one of our experts or browse our collection of high-quality outdoor saunas, including barrel and infrared, check out our UK Saunas website today.