Truwood^® Thermally Modified Cladding

Truwood is an excellent choice for cladding and is available in a wide range of 19mm thick vertical and horizontal weatherboard profiles. The timber is profiled in accordance with NZS3617 and Branz Bulletin 411, with both vertical and horizontal profiles compatible with all standard Rosenfeld Kidson cladding system details. It is the ideal cladding solution where less frequent maintenance is required. An additional benefit of the reduced movement in service is the increased performance of coatings. Truwood is also well suited to many other applications. Its relative low density makes it great for window frames, door sliders, garage doors, louvres and gates, as well as other internal joinery applications.

The increased biological durability is a result of the removal of natural food sources in the timber, as well as changes in the chemical and structural composition. Levels of resistance to fungal decay increase as higher temperatures are used. Density is lower and yields on average 350 kg/m3. The equilibrium moisture content and adherent dimensional stability is improved 40 to 50% by this process. Stability increases with higher treatment temperature. Generally, the strength of the modified timber has a direct correlation with density. The modification process slightly lowers the density and therefore has some effects on the strength values, which are comparable to Western Red Cedar. As with most materials, thermally treated timber is unable to resist the effects of ultra violet radiation. Over a fairly short period of time, when exposed to direct sunlight, the colour will fade from the original mid brown appearance to a grey weathered colour. In addition, the ultra violet radiation can cause small surface checks to occur, as with any timber. It is recommended to apply a pigment based surface protector to prevent colour changes and other natural effects of the weather.

Truwood is produced from the best export grade available, being SELECT grade. This grade is a clear grade and contains very little defects. Occasional tight knots, wormhole or end splits may be present.

Truwood is produced from a timber called Ayous, using the latest thermal modification technology, which involves applying heat at 160 - 230°C, water vapour and pressure to the timber.

Modified timbers are making an increasing inroad into the construction industry, as availability increases and their benefits are realised. Truwood offers increased durability, stability and aesthetics in a renewable timber that is readily available in clear, long lengths. This product is considered the most popular modified cladding timber in Europe.

Truwood carries a Durability Class 2 and is considered more durable than other naturally durable cladding types available. Truwood is also very stable, due to the modification process. Since the cell structure of modified wood absorbs less water, the equilibrium moisture content of the timber is also reduced. Improved dimensional stability reduces movement in service such as cupping, as well as splitting and checking around fixings.

Truwood is an excellent choice for cladding and is available in a wide range of 19mm thick vertical and horizontal weatherboard profiles. The timber is profiled in accordance with NZS3617 and Branz Bulletin 411, with both vertical and horizontal profiles compatible with all standard Rosenfeld Kidson system details. It is the ideal cladding solution where less frequent maintenance is required.

An additional benefit of the reduced movement in service is the increased performance of coatings. Rosenfeld Kidson coat Truwood Sansin PrecisionCoat WoodForce. WoodForce is a durable, low VOC stain, containing top quality pigments, providing a very natural finish, as well as exceptional water repellency and protection.

Truwood also is well suited to many other applications. Its relative low density makes it great for window frames, door, sliders, garage doors, louvres and gates, as well as other internal joinery applications.

For more information and/or a sample please feel free to contact our sales team who would be happy to assist.

DENSITY (KG/M3)*: 350 

DURABILITY: CLASS 2 - DURABLE 

*Air Dry Density (kg/m3) is average indication only and actual value may vary. 

PHYSICAL PROPERTIES 

Equilibrium moisture content 65% RH, 20°C: - 6.5%

Radial Shrinkage (fibre saturation point to oven dry): - 1.5%

Tangential Shrinkage (fibre saturation point to oven dry): - 1.9%

Thermal Conductivity: - 0.08 W/m.K

Bending Strength: - 40 N/mm2

Modulas of Elasticity: - 6.0 kN/mm2

Impact Work to Failure: - 20 kJ/m3

Hardness: - 1300 N