REDWOOD (THERMOWOOD) CLADDING

Thermo D. (Redwood) Pinus sylvestris

Millworks source Thermowood from carefully selected Redwood, by leading Finnish sawmills. Natural, thermal modification enhances the wood’s natural attributes resulting in a desirable dark brown, which is incredibly stable and durable. PEFC™ certified.

  • Grade: A/B Grade

  • Widths (19mm): 43mm, 93mm, 118mm or 143mm

  • Density: 420kg / m³

Innovative

Thermowood is heat treated in a unique gradual modification process, reaching temperatures of 212c. Chemical and physical properties in the timber change permanently, making it perfect for external cladding.

Consistent

Thermowood is dark brown in colour throughout, giving it an attractive and consistent look. If left untreated the colour will turn a silver-grey. Or, treatment can be easily applied for colour protection.

Durability

Thermowoods heat treatment, modifies and enhances the properties in the timber making it resistance to fungi. It therefore has a service life of over 30 years. Thermowood is BS EN 350-2 Class 2.

Stability

Thermowood is less likely to warp, twist or cup due to the inability to absorb or lose moisture caused from the thermal modification process. The low moisture content also achieves a superior, smooth finish when machined.

Thermowood (Thermo D)

Selective Scandinavian Redwood is chosen for tight sound knots. Thermowood (Thermo D) where D stands for durability, has a darker brown tone. Its durability and stability are improved significantly.

In external applications BS EN 335 Use Class 3, Thermowood meets the requirements of durability BS EN 350 Class 2.

DURABILITY CLASS 2, SUITABLE FOR EXTERIOR USE (BS EN 350-2)

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 product longevity.

In the correct conditions, Thermowood will weather to a silver-grey, if left untreated.
Although naturally durable, Thermowood can be finished for protection against the elements. This will keep it looking consistent on all elevations of your project. Millworks can advise on different options for protecting your timber.

Coatings can be applied under controlled factory conditions with Millworks state of the art finishing line. Alternatively, on-site products can be advised and supplied.

FRX Exterior fire retardant can be applied to Thermowood cladding when specified, to comply with national Building Regulations where Euroclass B or C are required. Applied under controlled conditions in a vacuum pressure timber impregnation plant. The treatment complies with ISO accreditation, which does not compromise critical properties such as strength, durability, corrosivity and hygroscopicity.

Specifically manufactured stainless-steel fixings, available in secret-fix, face-fix or clip systems, are designed for Millworks® timber cladding and decking profiles. Our fixings ensure long service life for best performance of the timber and coatings in any location. Full details available on specification data sheet.

PROFILES

  • Vertical or Horizontal

  • 93 / 118 / 143mm finish

  • 12.5 / 9.52 / 7.7 linear metres per m2

  • Face fix

  • Vertical or Horizontal

  • 93 / 118 / 143mm finish

  • 14.3 / 10.53 / 8.33 linear metres per m2

  • Secret fix

  • 3mm radius to corners, countersunk screw grooves, 9 degree slopes to all surfaces and stress-relief grooves.

  • Vertical or Horizontal

  • 93 / 118 / 143mm finish

  • 14.3 / 10.53 / 8.33 linear metres per m2

  • Secret fix

  • 3mm radius to corners, countersunk screw grooves and stress-relief grooves.

  • Vertical or Horizontal

  • 43 / 93 / 143mm finish

  • 23.3 / 10.8  / 7 linear metres per m2

  • Face fix

  • Wider finish available on request

  • Horizontal

  • 93 / 118 / 143mm finish

  • 10.75 / 8.47 / 7 linear metres per m2

  • Facade secret clip system available

  • 3mm radius to corners.

  • Vertical or Horizontal

  • 143mm finish

  • 8 linear metres per m2

  • Face fix

  • Horizontal

  • Planed finish

  • 143mm finish

  • 8 linear metres per m2

  • Face fix

  • Up to 200mm finish on request

PROJECTS