Why is it important to pressure treat field posts only after machining?

Why does De Sutter Naturally deliberately choose to pressure treat fencing posts only after machining?

In order to guarantee the durability of our pine timber agricultural fencing, we pressure treat the timber right down to the smallest pores. In contrast with many other colleagues who also manufacture fencing posts and agricultural fencing, we pressure treat only after machining the holes needed for the horizontal rails. We explain in this blog why this practice is important for the lifespan of the agricultural fencing.

Pressure treating the pine timber is the most important stage in ensuring the longevity of your agricultural fencing and fencing posts. The pressure treatment process must be done very accurately.

This is why we always start by carefully drying out the timber. The pressure treatment fluid is absorbed much better if the sap has disappeared from the timber. The timber must be saturated from the pressure treatment, right down to the smallest pores and fibres.

Why pressure treatment only after machining?
Holes must be drilled out for the horizontal rails which go through the agricultural fencing posts. We drill these holes out first and only then proceed with the pressure treatment. By doing this, the timber in the drilled holes is also pressure treated to the maximum extent possible. So we avoid weak spots in the post where the damp could penetrate and affect the timber.

This means extra cost, as there is additional handling after the sawmill over to the pressure treatment equipment. The product guarantee lapses if any further processing follows pressure treatment. This would allow the timber to be affected via the drilled hole.

Very long warranty periods
Machining first, and only then pressure treatment, is one of the many deliberate choices made by De Sutter Naturally in order to guarantee the durability and longevity of our agricultural fencing to the maximum extent possible. That is also the main reason why we operate with very long and unique warranty periods.

The pine timber undergoes a drying process prior to pressure treatment, so that the pressure treatment fluid penetrates right down to the smallest pores in the timber.

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