Process

Process Scheme 1

Thermo-D treatment of every fiber

What is ThermoWood®?

ThermoWood® is a patented brand created by the International ThermoWood® Association. It specifies the natural preservation process to transform wood into a durable product. Through every fiber, the durability class improves from IV or III up to I which implies a lifespan of over 25 years for class I. (EN 350-1)

Consistent quality due to standardized treatment

As a member of the International ThermoWood® Association, the standardized process of LDCwood® is identical to the Finnish process, which sets the gold standard of all thermal treatments. Twice a year, LDCwood® is audited by a Notified Body to maintain a high quality.
process-certifications-logos

ThermoWood® process in 3 phases

Phase 1
Timber dries and moisture content decreases.
  • High-temperature drying: 100-212°C 
  • Moisture level: 20% -> 2%

Phase 2

Kiln is kept at a steady temperature to modify the wood.
  • Thermal modification: 212°C
  • Moisture level: 2%
Phase 3
Temperature is lowered and the moisture content is increased with steam and water.
  • Conditioning/cooling
  • Moisture level: 2% -> 4-7%
process graph ThemoD-01-ENG
The ThermoWood® process, a part of​ LDCwood DNA
LDCwood® ThermoWood® is the result of connecting two concepts, with the thoughtful sourcing of the wood on the one hand, and the efficient preservation of it on the other. This is where LDCwood® perfectly align its logistical strength with the advanced technology behind their 6 kilns.

LDCwood® operators’ minds

LDCwood®’s philosophy is to let the wood direct the process, not the process direct the wood. LDCwood® Thermo Technicians, like the world’s most accomplished bakers, take on their job with the utmost attention to detail to achieve the perfect finished product, everytime.

Durability class

When exposed to weather without surface treatment, ThermoWood® products remain significantly drier than unmodified timber. In warm and humid climates, it is recommended to surface treat against humidity, erosion, and UV radiation. In conclusion, Thermo-D ThermoWood® survives even the most extreme weather conditions.

LDCwood® products are all Thermo-D, the most durable ThermoWood® with resistance to decay and weather.

Durability Class(EN 350-1)Use Class (EN335-1)Examples of applicationsProducts
1 Very durable3 Outdoors, Exposed to weather

Outdoor cladding
Garden structures

Thermo-D ayous, pine
2 Durable3 Outdoors, exposed to weatherOutdoor cladding
Garden structures		Thermo-D spruce
Thermo-D ash, ayous, fraké
3 Moderately durable2 Outdoors, under roofSauna structures
Outdoor structures and furniture
under roof		Thermo-S pine, spruce
Thermo-S hardwood
Thermo-D hardwood
4 Less durable1 Indoors in dry conditionInterior cladding 

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