Thermowood D Timber Cladding

Name: Thermowood D Timber Cladding
Brand: Vincent Timber Ltd
SKU: 2X9dxaFFbLJu92NhDXJvGd

Verified by manufacturer 2 days ago

VT2562 - Horizontal (secret fixed)

Vincent Timber Ltd

Product certifications:

Chain of Custody Certification
Certificate type

Vincent Timber’s Thermowood D timber cladding offers PEFC-certified, heat-modified softwood with improved stability, low maintenance, and a dark natural tone for a reliable external cladding option.

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Application

Thermowood D softwood weatherboards are designed for external timber cladding, available in a range of profiles and sizes to suit both modern and traditional architecture. This versatile timber cladding solution is ideal for a variety of projects:

Residential Housing - External walls, extensions, and renovations.
Commercial Buildings - Offices, retail spaces and showrooms.
Education Facilities - Schools and university buildings.
Hospitality & Leisure - Garden rooms, lodges, and hotels.
Public Sector - Libraries, community centres, and cultural spaces.

Other applications for Thermowood D cladding boards include external timber fins/louvres on a range of structures:

Solar Shading Systems - Timber louvres and brise soleil for energy efficiency.
Garden Structures - Screens, pergolas, and outdoor living spaces.
Fencing – Strong and attractive timber for boundary and privacy solutions

Description

Thermowood D is a heat-modified softwood cladding option, offering a rich, natural tone and enhanced stability for exposed exterior applications. Produced by treating softwood in high-temperature chamber kilns, the process changes the cellular structure, making Thermowood more dimensionally stable than untreated timber in variable climates.

The heat treatment uses only heat, vapour, and steam—no harmful chemicals—ensuring an environmentally responsible product. Thermowood can be left untreated to weather to a silver-grey finish or finished with stains, paints, or fire-retardant treatments for added protection.

Features and benefits:

Premium Appearance: Dark, natural tone for stylish exterior timber cladding.
Natural Durability: Classified as Durability Class 2, Thermowood D timber cladding provides excellent resistance to decay, moisture, and fungi, making it ideal for long-lasting outdoor applications.
Eco-Friendly Process: Produced without chemicals, using heat and steam only.
Versatile Finish: Accepts stains, paints, and FR treatments; can be left to weather naturally.
Sustainable Choice: PEFC-certified timber from responsibly managed forests.

General information

Color	Brown Clear Beige Black Blue Cream Green Grey Silver White Other Red Purple Show more
Finish	Smooth Textured Wood grain Woodgrain Sawn Blackened Burnt Coated Etched Fine Grained Matt Mill Natural Oil rubbed Other Painted Planed Pre-treated Pre-weathered Primed Rolled Sandblasted Sanded Treated Stained Unfinished Weathered Varnished Show more
Material	Timber
Shape	Rectangle Guidance for specification option: Profiled, Fin, Aerofoil.
Length	1800 mm 2100 mm 2400 mm 2700 mm 3000 mm 3300 mm 3600 mm 3900 mm 4200 mm 4500 mm 4800 mm 5100 mm 5400 mm 5700 mm Bespoke Show more
Width	44 mm 69 mm 98 mm 110 mm 122 mm 134 mm Bespoke 150 mm 165 mm 180 mm Show more
Height	Bespoke
Warranty description	Other

Uniclass	Pr_25_71_97_84 Softwood weatherboardsPrimary Pr_25_71_97_55 Modified wood weatherboards
CAWS	B91/460 Timber cladding H21/116 Horizontal timber weatherboarding H21/115 Vertical timber weatherboarding H21/111 Horizontal timber weatherboarding H21/110 Vertical timber weatherboarding H21/15 Horizontal timber weatherboarding H21/10 Vertical timber weatherboarding

SKU Code	Thermowood D

Specification data - Softwood weatherboards

Classification data
General requirements	Heat-treated Scandinavian softwood (pine/spruce), kiln-dried, thermally modified for enhanced durability (Class 2), PEFC-certified.
Standard	To BS EN 14915.
Third-party certification	PEFC certified.
Reaction to fire classification	To BS EN 13501-1, Class D-s2, d0. Guidance for specification option: In accordance with the SKBI (single burning item).
Release of dangerous substances	None. Guidance for specification option: Untreated Thermowood D does not release harmful substances under EN 14915.
Water vapour permeability	High, μ ≈ 40–60. Guidance for specification option: Natural timber is vapour-permeable; μ ≈ 40–60 typical for softwoods.
Thermal conductivity	0.13 W/m K.
Sound absorption	Low; α ≈ 0.05–0.10. Guidance for specification option: Solid timber generally reflects sound; not a dedicated acoustic material.
Resistance to fixings	Guidance for specification option: Stainless steel fixings recommended.
Wood species	European redwood.
Quality of timber (exposed surfaces)	To BS EN 14519, Grade A/B.
Profile	VT2562.
Finished size	-
Face width	122 mm. Guidance for specification option: Face cover excludes the recommended 2 mm expansion gap at installation. Manufacturer guidance Other profiles are available in 44 mm and 69 mm face widths, consult manufacturer for details.
Thickness	21 mm.
Biological durability	-
Use class	To BS EN 335, Use Class 2.
Preservative treatment	Not required. Guidance for specification option: Thermal modification provides durability; no chemical preservative required.
Flame-retardant treatment	Not required. Required (Euroclass B).
Surface texture	Smooth. Planed. Textured. Brushed.
Board length	1800 mm. 2100 mm. 2400 mm. 2700 mm. 3000 mm. 3300 mm. 3600 mm. 3900 mm. 4200 mm. 4500 mm. 4800 mm. 5100 mm. 5400 mm. 5700 mm.
MoistureContent	4–6%.
Density	350–480 kg/m3.
Accessories	Guidance for specification option: None as standard, consult manufacturer for details.
Applied finish	Not required. Paint coating. Guidance for specification option: Various colours available, consult manufacturer for details.

Sustainability data

Contains Red List materials	No
Country of material origin	Sweden Guidance for specification option: Sweden or Finland.
Country of product manufacture	United Kingdom
Manufacturing plant location	Sweden
Material	Timber
Carbon dioxide equivalent
Carbon dioxide equivalent, as defined in BS EN 15804 Self-declared
Stage Normalised unit (kg CO₂ eq/kg) Declared unit (kg CO₂ eq/unit) Stage:A1–A3 ('Production stage') Normalised unit : 0.42 (kg CO₂ eq/kg) Declared unit : 0.63 Lower emissions
Recyclability	100% Recyclable
Recycled content As defined in clause 7.8 of BS EN ISO 14021	0 %
Expected Life	30 year