It occurs to me that any wooden post concreted into a hole in the ground is
going to rot eventually, tanalised or whatever - it's got to be a matter of
time.

The worst area is going to be the end grain by my reckoning, since end grain
is the most absorbent and is going to absorb moisture faster than any other
part of the post.

Soaking the end in wood preserver is one option, but are there others?

A couple of inches of gravel in the bottom of the hole would provide a
natural drain, but might weaken the installation.

Wrapping the post in a plastic bag could work, but again might weaken the
installation because the concrete wouldn't bond to the post.

Piece of DPM in the bottom of the hole?

Any thoughts?


--
Dave
The Medway Handyman
www.medwayhandyman.co.uk
01634 717930
07850 597257