On 19/11/2016 12:45, wrote:
On 18/11/2016 18:46, Paul Giverin wrote:
How easy is it to replace the rotten posts in isolation without
disturbing the rest of the fence?
It's not.

Saw the ends off the arris rails up against the rotten posts, lift out
the panel, replace the posts (as others have said, this is easy or hard
depending on how much concrete there is), replace the posts (don't
bother making the mortices), refit the panel using these brackets
http://www.screwfix.com/p/arris-rail...-10-pack/48243 to
attach the ends of the arris rails.
If there's too much concrete around the old post bases then divide a
two-bay run into a three-bay run so you can put the new posts somewhere
easy.
Ooops, forgot to point out the b obvious that you'll need some new arris
for one run and to transfer the feather edge.
However you decide to tackle it, I would use concrete spurs and bolt the
new (or, possibly, old) posts to them so they won't rot again.