Thermo- Nordic Pine Horizontal Shadow Gap Secret Nail Cladding DTC18
Profile Description
Horizontal Shadow Gap cladding when fit together creates a 10mm-wide shadow line that changes throughout the day with natural sunlight. A subtle difference from a vertical profile is that one edge has a 'V line' designed for water run off
Key Features
18 x 94mm (78mm Cover)
Available Lengths
2.75 - 5.1m
| Price | Variation |
|---|---|
| £2.60 | per linear metre |
| £33.33 | per square metre |
prices shown exclude VAT
Weathering; What to Expect
In it's natural state Thermo-Nordic Pine is a light to medium brown tone. with exposure to UV it will start to weather and start to change to a silverly grey tone
Product Features
Origin
Finland
Grade
Fifths
Appearance
Prominent grain with an abundance of structurally sound live round and splay knots and small through holes. Some of which display cracks and chipped- off edges after machining.
Modification
Heat Treated (Thermo-D) International Thermowood Association (ITWA)
Weathering
Thermo Nordic Pine will naturally silver within 8 - 10 months
Certification
Sustainably sourced from well managed forests, PEFC Certified
Durability
Class 2 BS EN 350-2
Stability
Exceptionally stable with minimal dimensional movement
Surface finish
Smooth, MicroTek & Structured
Coating
Can be factory coated with SIOOX Clear (original) Light Grey & Mid Grey. Colourflex®, Chartex® and other wood protection systems
Fire retardant
Can be treated with Burnblock EN 4915:2013 / Euro Class B
Fixings
Stainless Steel Screws or Annular Ring Nails
Species available
Species:
Thermo-Nordic Pine
Thermo-Nordic Pine (Thermo Pine) is thermally modified Scots pine (Pinus sylvestris), slow-grown in Nordic forests, heat-treated at around 212°C in a controlled, oxygen-free atmosphere. The process — no chemicals involved — improves the timber's durability to Class 2 and removes the moisture and resins that cause movement, producing a dimensionally stable exterior cladding board with significantly reduced swelling and shrinkage.
Slow Nordic growth gives the pine a tight, even grain, and thermal modification turns it a rich, uniform caramel-brown throughout the board — not just at the surface. Left uncoated, it weathers naturally to silver-grey; a UV-protective coating maintains the brown tone. Small, sound knots give it a more characterful appearance than clear-grade species like Thermo-Ayous.
Sourced from sustainably managed Scandinavian forests, imported and machined in-house, Thermo-Nordic Pine is available in a range of profiles for cladding and fencing projects of any scale — a cost-effective alternative to Cedar and tropical hardwoods.

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