Why is the durability class important?
The durability class is actually the most important in assessing timber for agricultural fencing. The durability class indicates to what extent the timber withstands adverse conditions. Agricultural fencing is by definition exposed to wet and damp conditions, because the posts are in permanent contact with damp soil.
That is also the main reason why we choose timber exclusively from the best durability class (1-2). By doing this, your agricultural fencing is assured of longevity and is not going to rot away quickly.
A European standard has been established for the durability class. For example, the durability class for a given type of timber is measured by putting untreated timber in test conditions in contact with the ground. It is subsequently recorded how long it lasts before the timber is affected.
Why is the quality class important?
The quality class, however, has no established or measurable standards. Each country and each type of timber has its own classification system for quality. Furthermore, the quality class says nothing about the longevity, but instead about the appearance of the timber.
Thus, so-called premium-choice timber originates from the innermost core of the trunk. This means that the timber has no holes or blemishes. So we always use premium-choice timber for our tropical timber.
