What is the difference between Accoya Vs Thermowood

Thermowood is a beautiful, strong wood made by heating wood to very high temperatures. Changing wood’s temperature makes it naturally more resistant to decay and rot and makes it stronger.

Many people like to see how Thermowood compares to other types of wood. Today, we will discuss the good and bad things about using Thermowood and Accoya wood.

Accoya wood

One of the best things about Accoya wood is its strong and natural nature. Accoya wood has shown that it can withstand even the harshest conditions and rarely breaks out of its strong shape.

Do you wonder why you’ve never heard of Accoya trees or Accoya forests? They don’t exist, so they can’t be found.

Accoya starts as a Pinus radiata tree, growing quickly in managed forests. When the pine tree is about 30 years old, it is ready to be cut down. At this point, its trip is different from that of other woods.

Wood acetylation is the process that is used to make Accoya. Scientists have shown that changing wood is one of the best ways to improve its technical properties. When wood is acetylated, the cell structure changes, making it harder for water to get into the cell walls.

This change reduces the wood’s ability to absorb water in the cell walls by about 80%. This makes the wood much more stable and reduces the maintenance it needs.

Because the cell walls have changed, bacteria and fungi no longer see wood as food and stay away from it. Accoya is a great wood for building, especially in places where bugs, bacteria, and fungi are more likely to grow.

Accoya doesn’t rot or decay like Thermowood, which can be used in weather that changes a lot. Most people use Accoya for window frames, doors, decking, and cladding, much like what people do with Thermowood.


If you are reading this, it’s likely that you already know what Thermowood is. But if you aren’t, we’ll explain that Thermowood is just regular wood heated to 390 degrees Fahrenheit to make it more resistant to the weather, rotting, and decay. It is also often used because of how it looks.

We can promise you that if you take care of Thermowood properly, it will last for decades. Putting the wood through such high temperatures keeps it from warping and causing other problems that come with normal dehumidification.

Normal wood that hasn’t been treated might start to rot after a few years, but Thermowood’s new natural properties will keep it strong and protect it from bacterial or fungal decay.

What is the main difference between Accoya and Thermowood?

One of the biggest differences between Accoya and Thermowood is that Accoya uses acetic acid, while Thermowood only uses high temperatures and water vapor.

Even though it doesn’t hurt people, it adds another chemical to the process. In contrast, Thermowood only uses heat and water.

Still, Thermowood is said to last about 25 years (or longer with good care) with proper maintenance, while Accoya lasts at least 50 years.