Straight, Tight Grain
Old growth Western Red Cedar from the British Columbia coastal region
The wood fibre used to produce Silva Select Prestige VG Western Red Cedar cladding is of an exceptional quality. The raw material comes from old growth logs harvested in the coastal region of British Columbia, Canada.
It’s rich colour, tight growth rings, and the fact that it is all vertical grain, combine to give it a truly stunning and unique natural appearance.
Why is vertical grain Western Red Cedar so special?
For centuries builders have recognised that vertical grain timber has superior properties to flat grain, particularly when it is being used in severe exposures. In New England for example, there are many examples of homes, barns and churches built from vertical grain Western Red Cedar that are over 100 years old and still going strong.
Better resistance to UV degradation
The annual growth rings of a tree consist of early spring growth, which is softer and more porous, and late summer growth which is denser, harder and darker in colour. This is known as ‘early wood’ and ‘late wood’. Since ‘early wood’ is softer, it will degrade faster because of exposure to the sun’s ultraviolet (UV) rays, which will over time destroy the cellular structure of the wood.
With ‘vertical grain’ Western Red Cedar there is minimal exposure of the softer early wood, so it will put up much better resistance to UV rays and therefore last longer.
More dimensionally stable
With flat grain wood, the growth rings run roughly parallel with the face of the board, so when they shrink, boards have more of a tendency to cup. Vertical grain boards tend to shrink across the thickness so they remain flat with virtually no movement, meaning very low surface cracking and checking.
Better finish retention
Wood scientists have proved that vertical grain wood has better finish absorption and retention qualities than flat grain wood. This means that finishes last longer so won’t need re-applying as frequently, and thus maintenance costs will be reduced. Also, the absorption rate - and therefore the appearance and performance - of the finish will be more consistent, since it is only going into vertical grain wood. As a result, a project will look good for longer.
Silva Select Prestige VG is all heartwood which comes from the dense inner part of the tree trunk. Heartwood is more durable than sapwood, which comes from the outer part of the tree nearer the bark.
Kiln dried for optimum dimensional stability
Silva Select Prestige VG is kiln dried at source by experts in the art of drying Western Red Cedar. Controlled drying in state-of-the-art kilns is a far better method of drying wood than air drying, as a far more consistent and accurate moisture level can be achieved. The main advantages of kiln drying are improved dimensional stability, the ability to apply a finish immediately and install with minimal site acclimatisation.