The Key Differences Between Thermally Modified Wood and Non-Thermally Modified Wood

Have you ever wondered what makes one type of wood stand out from another? If you’re in the market for a sauna, decking, or any project involving wood, you’ve probably come across the terms "thermally modified wood" and "non-thermally modified wood." These terms might sound technical, but understanding them could be the key to making the right decision for your needs.

What Is Thermally Modified Wood?

Thermally modified wood undergoes a specialized heat treatment process where the wood is heated to temperatures between 180°C and 230°C (356°F to 446°F) in a low-oxygen environment. This process alters the chemical and physical properties of the wood, enhancing its durability, stability, and resistance to moisture.

The Process of Thermal Modification

1. Heating: The wood is gradually heated to remove moisture and modify its structure.
2. Chemical Changes: The heat alters the sugars and hemicellulose within the wood, making it less appealing to fungi and pests.
3. Cooling and Rehydration: The treated wood is cooled and rehydrated to prevent cracking or warping.

This transformative process creates wood that is not only more durable but also environmentally friendly, as it doesn’t rely on chemical preservatives.

Non-Thermally Modified Wood: The Traditional Option

Non-thermally modified wood refers to untreated wood in its natural state. While this type of wood is widely used in construction and manufacturing, it comes with certain limitations, particularly in environments where moisture, temperature fluctuations, or pests are concerns.

Key Characteristics of Non-Thermally Modified Wood

• Prone to Moisture Absorption: Untreated wood is highly susceptible to swelling, warping, and rotting when exposed to moisture.
• Vulnerable to Decay: Natural wood is more likely to attract fungi, mold, and insects, leading to shorter lifespans.
• Less Stable: Temperature changes can cause untreated wood to expand or contract, affecting its structural integrity.

While non-modified wood has its place in certain applications, it often requires chemical treatments or regular maintenance to enhance its performance.

Comparing Thermally Modified Wood and Non-Thermally Modified Wood

Now that we’ve covered the basics, let’s break down the key differences between these two types of wood.

1. Durability and Longevity

Thermally modified wood offers superior durability compared to its untreated counterpart. The heat treatment process reduces the wood’s ability to absorb moisture, making it highly resistant to rot, decay, and insect infestations. Non-modified wood, on the other hand, is more vulnerable to these issues, often requiring chemical treatments to prolong its lifespan.

2. Dimensional Stability

One of the standout features of thermally modified wood is its dimensional stability. It’s less likely to warp, shrink, or expand when exposed to humidity or temperature changes. Non-thermally modified wood, however, is prone to swelling and contraction, which can compromise its structural integrity over time.

3. Environmental Impact

Thermally modified wood is an eco-friendly choice, as it doesn’t rely on chemical preservatives or treatments. The thermal modification process uses heat and steam, resulting in a sustainable product. Non-modified wood often requires chemical treatments to enhance its durability, which can have environmental consequences.

4. Aesthetic Appeal

The thermal modification process enhances the natural beauty of wood by darkening its color and giving it a rich, uniform appearance. Non-thermally modified wood retains its natural, often lighter color, which can be appealing in some settings but may require staining or finishing to achieve a specific look.

5. Maintenance Requirements

Thermally modified wood requires minimal maintenance due to its resistance to moisture, rot, and pests. Non-thermally modified wood often needs regular upkeep, including sealing, staining, and repairing damaged areas.

Why Salus Saunas Uses Thermally Modified Wood

At Salus Saunas, we believe in delivering the highest quality products to our customers, which is why we prioritize thermally modified wood in our sauna designs. Here’s why this choice sets us apart:

• Enhanced Performance: Our saunas are built to withstand high humidity and temperature conditions, making thermally modified wood the perfect material for long-lasting durability.
• Sustainable Practices: We’re committed to environmentally friendly solutions. Using thermally modified wood aligns with our mission to create sustainable products without compromising quality.
• Beautiful Design: The rich, dark tones of thermally modified wood add a touch of elegance to every sauna, enhancing both aesthetics and functionality.

By choosing Salus Saunas, you’re investing in a product designed to last, crafted with care, and optimized for your wellness journey.

When to Choose Thermally Modified Wood

Thermally modified wood is ideal for applications where durability, moisture resistance, and low maintenance are priorities. Here are some examples:

• Saunas: High humidity and temperature make thermally modified wood the best choice for sauna interiors and exteriors.
• Decking and Outdoor Furniture: Its resistance to moisture and pests makes it perfect for outdoor use.
• Cladding and Siding: The dimensional stability of thermally modified wood ensures it holds up well against weather changes.

If your project involves exposure to harsh conditions or requires long-lasting performance, thermally modified wood is the way to go.

When Non-Thermally Modified Wood May Be Sufficient

While thermally modified wood has clear advantages, non-thermally modified wood can still be a viable option for certain applications, particularly if:

• Cost is a Concern: Non-modified wood is often less expensive upfront.
• Temporary Use: For projects with a shorter lifespan, untreated wood might suffice.
• Indoor Applications: In dry, climate-controlled environments, untreated wood may perform well without additional treatments.

However, keep in mind that non-modified wood may require more maintenance and chemical treatments over time, which could offset the initial cost savings.

Final Thoughts

Understanding the differences between thermally modified wood and non-thermally modified wood is essential when choosing materials for your next project. While both have their place, the superior durability, stability, and eco-friendliness of thermally modified wood make it the clear choice for high-performance applications like saunas.

At Salus Saunas, we’re passionate about creating exceptional products that enhance your wellness experience. By using thermally modified wood, we ensure that every sauna we craft is built to last, beautifully designed, and environmentally responsible.

Ready to learn more about how Salus Saunas can elevate your wellness journey? Contact us today to speak with our team and discover the perfect sauna for your needs. Let’s bring your vision to life with materials that stand the test of time!