If you’re considering which wood types to use for a renovation or construction project, there are several considerations that may influence your decision – including where it will be used, how durable you need it to be, and the color profile and overall visual effect you want to achieve. To help you make your mind up, we’ve put together some useful information about wood types available from Thermory.
At the core of Thermory’s products is thermal modification — a precise, chemical-free process where carefully controlled heat and steam permanently enhance the wood’s properties. Moisture content is lowered, dimensional stability improved, and resistance to rot, fungi, and insects increased. The result? Beautiful, long-lasting thermowood cladding boards.
But not all modified wood is created equal. Every Thermory species is carefully selected, responsibly sourced, and thoroughly tested to ensure consistently high performance across durability, stability, and appearance. Where some providers simply offer “thermo” products, we engineer Thermory thermowood — combining advanced technology with strict quality control to deliver the kind of precision and reliability that architects, builders, and clients can trust for decades.
Read more about what is thermally modified wood.
Ideal for: High-end residential and commercial projects where refined appearance and lasting performance are needed
Thermo-ash is the showstopper of thermally modified woods. With its deep chocolate-brown tone, this premium hardwood makes a statement whether it’s cladding a minimalist modern home or an urban landmark. It’s favored by architects and builders who seek the warmth and visual impact of tropical hardwoods without environmental compromise.
Thermal modification transforms ash into a material that resists warping, cupping, and bending. And with Class 1 rot resistance (25+ years), thermo-ash is proven to withstand the elements.
Ideal for: Buildings looking for a bit of rustic edge
Thermo-spruce has long been favored in Northern European architecture, and for good reason. It is modest yet refined, durable yet beautiful. It ages gracefully, turning silvery over time unless protected with a UV-resistant finish.
Spruce is an affordable cladding material that’s perfect for demanding climatic conditions and is suitable for a variety of surface treatments and finishes.
We offer thermally modified spruce with the Nordic Swan Ecolabel, which certifies that the wood originates from responsibly managed forests, is free of chemicals and is extremely durable when used outdoors.
Ideal for: Everything! Pine works equally well in urban setting as in the middle of a forest.
There’s something comforting about thermo-pine. With its visible knots and warm golden hues, it brings an approachable, lived-in feel that connects buildings to their surroundings.
As with spruce, thermo-pine is available with the Nordic Swan Ecolabel, so you can rest assured that the wood is responsibly sourced. Add in a Class 2 durability rating of 15+ years, and it offers rot resistance that is hard to match among similar softwoods. All in all, it’s a cost-effective option that doesn’t compromise on longevity.
Ideal for: Contemporary designs requiring a smooth, uniform appearance.
Thermo-radiata pine or clear pine is the equivalent of quiet luxury. It carries the design rather than competing with it, ideal for projects where surface treatment, profile, or rhythm do the storytelling. Its tropical wood appearance makes it a smart aesthetic alternative with a lighter footprint.
Ideal for: Elegant public buildings and residential projects where longevity and heritage matter.
Thermo-oak exudes quiet confidence. Oak being known for its beauty and quality, brings a timeless integrity to facades. Thermal modification unlocks not just performance, but also a richer, more uniform color palette that still honors the oak’s natural beauty.
Selecting timber cladding starts with your design intent. Consider the tone, grain, and texture that complement your architecture.
Think about how you want the facade to age. Do you want to preserve its rich color or embrace a natural silver patina? Factor in project location, exposure to sun and moisture, and your desired level of maintenance.
And always prioritize proven stability, durability, and responsible sourcing to ensure beauty that lasts.
Read our in-depth timber cladding guide.
| ASH | PINE | SPRUCE | RADIATA PINE | OAK | |
| STYLE | Sophisticated, modern | Nordic, approachable | Rustic, natural | Clean, contemporary | Classic, elegant |
| COLOR | Deep brown | Golden-brown | Light golden | Honey-caramel | Rich warm brown |
| TEXTURE | Smooth, knot-free | Knotted, textured | Knotted, textured | Smooth, knot-free | Smooth, knot-free |
| DURABILITY | Class 1 (25+ years’ protection against wood decay) | Class 2 (15+ years’ protection against wood decay) | Class 1 (25+ years’ protection against wood decay) | Class 2(15+ years’ protection against wood decay) | Class 1 (25+ years’ protection against wood decay) |
| SOURCING | Europe and North America | Northern Europe | Northern Europe | New Zealand | North America |
tableWe don’t just thermally modify wood, we engineer it to meet the demands of ambitious architectural visions. From luxurious modern homes to large-scale public buildings, Thermory’s products deliver long-term performance and standout beauty.
Our timber is responsibly harvested, certified, and go through a chemical-free thermal modification process that enhances durability and stability.
Need help choosing the best wood for your project?
Reach out to our team for samples, specs, and technical guidance. We’re here to help bring your vision to life—naturally.
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