Thermo Radiata Pine undergoes the same rigorous thermal modification process as our other thermowood species, converting a widely available softwood into a high-performance sauna timber with the durability and stability of far denser hardwoods. The thermal treatment eliminates the resins and volatile compounds native to untreated pine, removing the off-gassing concerns that make standard pine unsuitable for sauna use. What remains is a clean, structurally sound timber that performs reliably under continuous heat and moisture exposure.

Its warm, caramel-brown coloration and pronounced grain character give Thermo Radiata a handsome, natural appearance that suits both contemporary spa environments and traditional sauna designs. Competitively priced relative to other thermowood species without sacrificing performance, it is an ideal specification for large commercial projects, hotel wellness facilities, and multi-unit residential installations where quality and value must coexist.

Species Overview

Janka Hardness: 710 lbf | Grain: Straight to Wavy
Avg Dried Weight: 34 lbs/ft³ | Odor: Virtually None
Color: Medium to Dark Brown | Resin Content: Non-Resinous (post-treatment)

Radiata Pine is one of the most widely planted commercial timber species in the world, cultivated extensively in New Zealand, Chile, Australia, and Spain for its fast growth and excellent workability. In its natural state, it contains resins that make it unsuitable for sauna use — but thermal modification changes everything. The high-temperature treatment process drives out all volatile resins and permanently seals the wood’s cell structure, producing a clean, stable, high-performance sauna timber from a globally abundant and responsibly managed resource.

Post-treatment, Thermo Radiata develops a warm, caramel-to-chocolate brown tone and a pronounced grain character that gives sauna interiors a handsome, natural richness. It is harder and denser than most thermowood species, lending it excellent durability and resistance to wear in high-traffic commercial environments — hotel wellness facilities, fitness club sauna suites, and resort spa installations where long service life is non-negotiable.

Competitively priced relative to Nordic thermowood species without sacrificing performance or visual appeal, Thermo Radiata is the specification of choice for large-scale commercial projects that demand quality, consistency, and value at scale.

Available Materials

STS A – 1X4 | T&G Nickel Gap – Wall Profile
Thermo Radiata’s warm caramel-to-chocolate brown tone and pronounced grain character make the 1×4 nickel gap panel one of the most visually dynamic wall options in our thermowood range. The shadow-line reveal emphasizes the wood’s natural figure, creating a rich, layered interior that reads as both natural and designed.

• Nominal size: 1×4 | Actual size: 0.59″ x 3.54″ x 94.49″
• Face width: 3½» with ½» gap reveal | Profile: T&G / nickel gap
• Typical use: Walls and ceilings | Installation: Blind nail or clip

STS A – 1X4 DUAL | T&G Nickel Gap – Wall Profile
The dual-face Thermo Radiata panel is built for large-scale commercial installations where consistent quality and visual impact are required across every surface. Its deep, uniform coloring and tight thermowood grain perform equally on both faces, making it the reliable choice for high-visibility wellness environments.

• Nominal size: 1×4 | Actual size: 0.59″ x 3.54″ x 94.49″
• Face width: 3½» with ½» gap reveal | Profile: T&G / nickel gap
• Typical use: Walls, ceilings, partition walls | Installation: Blind nail or clip

S4S A – 2X4 (*) | Bench Profile
Thermo Radiata’s greater density relative to other thermowood species makes it one of the most durable bench board options in our range. The 2×4 S4S profile delivers a hard-wearing, smooth seating surface that holds up to the rigors of daily commercial use while maintaining a refined appearance over the long term.

• Nominal size: 2×4 | Actual size: 1.10″ x 3.54″ x 94.49″
• Profile: S4S / smooth four sides
• Typical use: Benches and platforms | Installation: Face nail or screw

S4S A – 2X6 (*) | Bench Profile
The 2×6 Thermo Radiata bench board brings the species’ durability and visual richness to broad, high-traffic benching systems. Its wide face and deep brown coloring make it the natural specification for hotel spa facilities, fitness club saunas, and resort wellness installations built to impress and built to last.

• Nominal size: 2×6 | Actual size: 1.10″ x 4.72″ x 94.49″
• Profile: S4S / smooth four sides
• Typical use: Benches and platforms | Installation: Face nail or screw