Vacuum thermal modification
with no chemicals.
Stable dimensions, fixed tone, and long service life.
For facades, decking, interiors, and saunas.
Two modes
Light 187 °C and Dark 215 °C. Tuned precisely to your reference.
6% moisture
Balanced after the cycle. No extra drying, stable from day one.
Keeps shape
Vacuum reduces stress. Boards keep geometry.
Clean process
Only heat and vacuum. No chemicals. Ready for use.
About us
Who we are
We produce thermally modified wood in vacuum on WDE Maspell Thermo Vacuum System equipment. The team’s background is lumber logistics. We prioritize deadlines, quality retention, and reliability.
Team and capacity
- Chambers: 2 × WDE Maspell TVS stainless chambers.
- Industrial control and monitoring: industrial control, monitoring with remote TOTAL VISION access and automatic batch parameter logging.
- Throughput: calculated for your species and thicknesses.
How we work
- Sorted feedstock with confirmed grade and moisture.
- We tune the thermal cycle to the needed reference, then reproduce it.
- We issue a batch passport with key cycle parameters.
Development
We run applied research with Tallinn University of Technology and build datasets by species and modes.
Technology
What we do
- We heat wood in vacuum to 187 °C or 215 °C. The time/temperature profile is program-controlled to target properties.
- After the thermal cycle moisture is very low. We bring it to 6% by steam conditioning for easy installation.
- Volatile particles (moisture, resins, organic compounds) are removed during the process. The surface is completely clean after the cycle.
How vacuum helps
- Even heating across the section. Sharp gradients are avoided. Batches are uniform.
- Lower internal stress. Fewer cracks during sawing, installation, and use.
- Minimal deformation. Profiles hold straightness in variable humidity.
Process control and safety
- Temperature and pressure monitoring at four points. Variable-frequency fans equalize airflow.
- Condenser captures volatiles.
- Vacuum lowers oxygen to a safe level.
- Auto-wash after each cycle keeps cleanliness and batch-to-batch stability.
Standards and measurability
We operate within the logic of European norms: EN 350-2 (classes of natural durability), CEN/TS 15679 (thermowood characteristics), EN 14298 (industrial drying quality). This simplifies specification and site acceptance.
Advantages
For business
- Lower site waste and fewer claims due to stable geometry and predictable moisture.
- Fixed batch tone and reproducibility in repeat orders.
- Transparent lead times and a batch passport with cycle parameters.
For designers and contractors
- Geometric stability. Profiles meet installation gaps and stay straight without rework.
- Coating compatibility. Clean, resin-free surfaces speed painting and reduce defects.
- Tone is set in production, not on site. That lowers off-tone risk.
For operation
- Up to 40%* lower moisture uptake vs. untreated wood. Seasonal movement is reduced.
- Uniform tone through the thickness.
- Dimensional stability needs no maintenance.
* Value according to test reports and the batch passport.
Products and Projects
Categories
- Cladding
- Decking
- Interior wall panelling and slats
- Sauna wall lock and elements for wet areas
- Custom to client-supplied blanks
Tones and modes
- Light 187 °C
- Dark 215 °C
- Individual tone adjustment to client reference within a controlled range.
Species
- Pine
- Spruce
- Birch
- Ash
- Ayous
- Other species by agreement
Examples of real applications
Audience
Who it fits
- Modular and timber-frame house manufacturers
- Facade and decking contractors
- Furniture and interior factories
- Sauna manufacturers and installers
What we solve
- Predictable tone and profile stability at dispatch.
- Installation without resin bleed and without on-site adjustments.
Contact us
- Telephone number: +372 51911877
- Email address: info@sgthermo.eu
- Legal address: Gonsiori 29, 10147 Tallinn, Estonia
- Production address: Energia 10, 63308 Põlva, Estonia
You can write to us directly: