I am going to build a fence and have dug down posts. They are not aligned or adjusted yet.

Due to stones and other things in the ground, the posts have ended up at slightly different heights, and the distances between them vary by about +/- 40 cm.

The next step is to set the posts. As I understand it, you should not paint pressure-treated posts until at least about a year later, since the wood needs to dry first.

Is untreated wood an option for posts, or is there a risk that they will rot quickly?

I would gladly receive tips on how to best proceed. There is still an opportunity to change placement, height, and solution before I continue.
 
  • Concrete fence post foundations in a row with uneven heights in dug holes, surrounded by soil, with orange string for alignment.
  • Red wooden picket fence with pointed tops in a garden setting, surrounded by greenery and white flowers, under a clear sky.
If I remember correctly regarding the assembly of plints, you would need to rotate the plints 90 degrees so that the plintjärn better stabilizes the fence. As it is now, the risk of the fence becoming unstable increases.
 
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I would say that orientation is not life-changing.

But I suggest throwing in half a sack of concrete per plinth for increased stability.

And it will look better if you can get the height more even, I would rather raise the lowest than have very varying height.

Untreated is of course okay; it's been built that way for several hundred years.
 
Yes, we built fences with untreated wood. Painted them beforehand which is easier.
 
Marlen Eskilsson Marlen Eskilsson said:
Yes, we built fences with untreated wood. Painted them beforehand, which is easier.
Either you had untreated or painted wood.
 
Untreated before we painted it, not pressure-treated that is.
 
Pressure-treated wood must be dry before painting, just like other wood, and how dry it needs to be depends on the choice of paint. Since you seem to have Falu Rödfärg in the picture, it only needs to be reasonably dry and not carpenter dry as the paint allows moisture to escape. The advantage of unpressure-treated wood is that it can be painted directly and before assembly, but for Falu paint, the paint is often easily scratched off during handling, so I would paint afterward regardless. If you have chosen another paint suitable for fences, it becomes a slightly different question because although they allow moisture to escape, it doesn't happen as quickly as with a distemper paint.
 
I suggest regular sawn softwood, preferably with a beveled top edge and without direct contact with the concrete footing at the lower end.
 
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