Questions about Thermawood -USA waterproof real wood?
Here’s how it works.
100% real wood. Built to handle water.
Is Thermawood-USA real wood?
Yes. It's 100% solid hardwood.
You can sand it, stain it, and refinish it.
What is thermally modified wood?
Real hardwood changed using only heat and steam.
No organic material = no cupping, warping, gapping, or splintering.That's the difference.
Is it actually waterproof?
Yes. It doesn't react to moisture like traditional hardwood, making it suitable for bathrooms, concrete slabs, radiant heat, and other high-moisture areas.
Is this something new?
No. Europe has been enjoying this wood for nearly 40 years.
Can this go over concrete slabs or radiant heat?
Yes. That’s one of the biggest advantages. It’s built for both.
How does heat and steam make wood handle water?
The wood is heated to approximately 380°F in an oxygen-free kiln, removing the organic material that causes excessive movement.
No organic material = no cupping, warping, gapping, or splintering.
Steam then cools and stabilizes the wood, permanently locking in the change.
Where can this actually be used?
Anywhere — coastal homes, bathrooms, concrete slabs, decks,
cladding, beams, trim, pergolas, doors, and even saunas.
Can I use wide plank flooring like White Oak?
Yes. That’s one of the biggest advantages. We offer true wide planks — 7″–11″ widths with lengths up to 14′–16′.
Does it install differently?
No. It installs like real wood — because it is real wood. It sands, stains, and finishes the same.