ThermoWood® Pine

ThermoWood® Pine is sourced from carefully selected Nordic forests and produced by International ThermoWood® Association members. The timber undergoes a natural heat treatment that permanently improves its dimensional stability and durability without chemical additives. The result is a versatile material with reduced movement, improved resistance to decay and excellent long‑term performance.

ThermoWood® Pine is a dependable choice for projects that demand durability, stability and visual warmth – perfect for exterior cladding, interior panelling and outdoor decking where it delivers consistent results across residential and commercial projects.

Applications: External Cladding, Interior Cladding, Decking
Certification: PEFC™
Density: 420kg / m³
Durability: Class 2 (BS EN 350)
Fixing systems: Compatible with MillFix® and Secret clip system

Benefits of ThermoWood® Pine

Dimensional stability

ThermoWood’s patented thermal modification process enhances the timbers natural attributes and ensures long lasting stability. Highly resistant to warping, twisting and cupping, ThermoWood® Pine retains its structural integrity even in fluctuating temperatures or humidity, ensuring long-lasting performance in a variety of climates.

Design flexibility

Available in a wide range of profiles, widths and installation systems, ThermoWood® Pine provides versatility for modern and traditional designs. Compatible with other construction materials, its consistent quality and low movement make it a preferred choice for surface textures and factory finishes.

Coating longevity

The dimensional stability and absence of resin pockets ensures that MillCoat® factory coatings last longer with reduced maintenance needs compared to other coated timbers. Coatings stay intact and protective for extended periods and are less likely to degrade due to expansion or contraction of the timber.

Sustainability

Sourced from well-managed Scandinavian forests ThermoWood® Pine is PEFC™ certified. The thermal modification process has been designed to minimise environmental impact and relies solely on heat and steam, making it safe for both indoor and outdoor use. All Millworks thermally modified timbers are sourced from International ThermoWood Association members.

ThermoWood® Pine Grading

Millworks Grade C

Millworks C Grade timber features prominent knots, grain variations, and other natural characteristics that are crucial for maintaining the integrity of the board. These visual characteristics are not a reflection of durability or quality. This grade is ideal for projects that wish to showcase the timber’s natural beauty with visible grain pattern and texture.

Knots are unlimited in this grade and are essential to certain species for board structure especially when thermal modified.

ThermoWood® Pine Applications

External Cladding

ThermoWood® Pine is a sustainable and durable choice for both modern and traditional architectural designs, offering a balance of long-lasting performance and beauty. The thermal modification process alters the wood’s structure, making it resistant to rot, fungi, and insect attacks without the need for chemical treatments. This modification process creates a timber with enhanced stability making ThermoWood® Pine our preferred choice for factory coated external cladding.

Interior Cladding

The eco-friendly thermal modification process relies solely on heat and steam, making ThermoWood® Pine safe for indoor and outdoor use. Its non-toxic nature means its family-friendly, making it a great choice for residential applications. ThermoWood’s thermal properties help regulate indoor temperatures, enhancing energy efficiency and the timber’s smooth finish and warm tones help to create cosy, inviting interiors.

Decking

Millworks ThermoWood® Pine decking is a robust and dimensionally stable solution for outdoor spaces. The thermal modification process reduces the wood’s ability to absorb water, ensuring ThermoWood® Pine lasts longer than untreated wood in garden settings. As a result of the thermal modification process, the timber does not secrete resin even in high temperatures making it a practical and attractive choice for long-lasting garden decks.

ThermoWood® Pine Finishes

Surface Textures

In addition to our standard planed finish, surface texture can be added to create accentuated depth to the timber grain. Surface textures are recommended when coatings are applied to improve performance and enable enhanced adhesion and longevity.

Compatible with FineSawn, Brushed, and Mokuzai®.

Factory Coatings

In the correct conditions, ThermoWood® Pine will weather to a silver-grey, if left untreated. Although naturally durable, ThermoWood® Pine can be finished for protection against the elements. Millworks offers a range of factory coatings that serve both decorative and protective purposes, producing consistent results with a range of aesthetic options to suit your project.

Compatible with MillCoat® and OrganoWood®.

Fire Treatment

FRX fire retardant can be pressure-impregnated into ThermoWood® Pine under ISO-controlled conditions to meet national Building Regulations for Euroclass B or C compliance.

Read our Timber Tattle article on Fire treatment for timber.

Surface textures

In addition to our standard planed finish, surface texture can be added to create accentuated depth to the timber grain. Surface textures are recommended when coatings are applied to improve performance and enable enhanced adhesion and longevity.

Compatible with FineSawn, Brushed, and Mokuzai®.

Factory coatings

In the correct conditions, ThermoWood® Pine will weather to a silver-grey, if left untreated. Although naturally durable, ThermoWood® Pine can be finished for protection against the elements. Millworks offers a range of factory coatings that serve both decorative and protective purposes, producing consistent results with a range of aesthetic options to suit your project.

Compatible with MillCoat® and OrganoWood®.

Fire treatment

FRX fire retardant can be pressure-impregnated into ThermoWood® Pine under ISO-controlled conditions to meet national Building Regulations for Euroclass B or C compliance.

Read our Timber Tattle article on Fire treatment for timber.

Fixings systems for ThermoWood® Pine

Secret Clip System

The Secret Clip System is made up from precision grooved boards, coated aluminium rails and pre-spaced clips. Screw-free and fast to fit, it can be attached to walls, ceilings and flat surfaces, providing a seamless finish and consistent alignment between the boards.

MillFix® Screw System

Using the correct fixings is critical to the performance of timber cladding. MillFix screws deliver a clean and secure fixing for face fix and secret fix profiles ensuring optimal performance of the timber and factory coatings.