Thermowood species · 01
Nordic Softwood · EN 350 Class 2
House of Vrikshat · Thermowood collection

Thermo Pine

Pinus sylvestris — thermally modified at 212°C

Scots Pine from Nordic mills, cooked at 212°C under steam at our Gandhidham kiln. No preservatives, no copper salts. The board stops moving with the seasons and darkens to a honey-brown that runs right through the thickness.

Kiln temperature

212°C

Heat and steam, no chemicals

Durability class

5 → 2

EN 350:2016

Moisture content

4–6%

down from ~12% raw

Service life

20+

years above ground, Indian climate

Species overview

Nordic workhorse of the thermowood range.

Pinus sylvestris grows slowly in Nordic forests — Finland, Sweden, Norway. The cold shortens the growing season, which tightens the grain. Boards arrive at our Gandhidham facility kiln-dried to 10–12% moisture, FSC-certified at source (chain-of-custody SCS-COC-006930).

Scots Pine is the original species the Finnish ThermoWood process was developed on at VTT. After the Class D cycle at 212°C under steam it moves from EN 350 durability class 5 (non-durable) to class 2 (durable) — the same band as teak heartwood.

Origin cycle

80+ yr

Nordic natural forest growth cycle. Slow growth, tight annual rings, consistent board character.

Thermo cycle

212°C

Finnish ThermoWood Class D standard. Heat and steam only. No preservatives.

Full specification

Thermo Pine — raw vs modified.

Every value below is sourced from an independently published technical standard or the ThermoWood Association technical handbook. Nothing is estimated or marketing-derived.

Values double-verified
Property
Raw Scots Pine
After Thermowood-D
Source
Equilibrium moisture content
~12%
4–6%
ThermoWood Handbook, Section 2.2
Dimensional movement (radial + tangential)
Typical softwood
50–60% less
ThermoWood Handbook; ISO 21887
Density @ 12% MC
~500 kg/m³
410–430 kg/m³
USDA FPL; ThermoWood Handbook
EN 350 natural durability (heartwood)
Class 5 — non-durable
Class 2 — durable
EN 350:2016; CEN/TS 15679
Service life, Use Class 3 (above ground)
5–10 years
25–30 yr Nordic20+ yr Indian climate
ThermoWood Assn; EN 335
Thermal conductivity
~0.12 W/mK
0.09–0.10 W/mK
~20% lower than raw pine
Brinell hardness
~1.9 N/mm²
1.5–1.8 N/mm²
Slightly reduced after hemicellulose loss
Fire reaction (untreated board)
Class D-s2,d0
Class D-s2,d0
EN 13501-1; FR-coated build on request
Colour
Pale yellow-cream
Honey-brown throughout
Caramelised pyrolysis, not surface stain

Primary sources: International ThermoWood® Association technical handbook; USDA Forest Products Laboratory, FPL-GTR-190; EN 350:2016; EN 335:2013; EN 13501-1:2018; CEN/TS 15679:2007; ISO 21887. Independent test reports available per project on request.

Where it goes

Five applications.

01Facade cladding
02Decking
03Wall panelling
04Ceiling slats
05Sauna linings

Full process explanation on the Thermowood range page. Install specifications issued per project — request technical PDF.

Specify Thermo Pine

See the board before you specify it.

Order free samples, download the technical datasheet, or send us the BOQ and we come back with profile, lead time and pricing. Shipped pan-India from Kaithal.

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