On 15/06/2018 09:32, Martin Brown wrote:
On 15/06/2018 07:46, Jim K wrote:
Jim Walsh Wrote in message:
Hi all.

I get a bit obsessive in trying to make sure that the end results
of my DIY jobs are long-lasting (where appropriate). On the matter
of wooden fence posts, is it likely to increase the life of the
below ground section if I cover that portion of the wood in
bitumen? I imagine that preventing soaking from ground water should
do some good.

Its the bit where the air & soil/water meet where the rot strikes,
even treated posts succumb.

+1 and I haven't found a solution.

Embedding in concrete with the top angled so that water runs away from
the wood is an improvement but also a lot more work. I have also tried a
lead cap on the top of big posts to stop freeze thaw splitting them.

I estimate where that transition point will be when the posts will be
installed & paint posts with bitumen in a tall 12" /18" "stripe".

Does it make a worthwhile difference? I might try that.

I generally find the deeply buried spike in perfect condition once it is
buried more than about 6" - this makes it much harder to get out.

Not half as hard as getting the rotten stump out of concrete.

I usually bury a spur. When the post rots away I can just bolt a new
post on.

Andy