In article ,
Clyde wrote:

I would suggest that you do it the right way. Completely remove the old
post and install a new post. I believe that you will be happier in the
long run and it will probably be less work. I've replaced numerous
redwood posts on a basketweave fence. If the old post is set in
concrete it can be a real pain to dig up the concrete but it is still
only an extra hour. However it sounds like you plan to remove the old
base regardless. The new post needs to be strong if it supports the
gate so you need a good concrete base.

Concrete filled PVC will not have much sideways strength. The concrete
will easily fracture. You might fill the pipe with concrete and rebar
but I wouldn't bet on success.

If you are going to all this effort do something where you are confident
of success.

Dick

We have a small (8 section) basketweave fence that's been around for
40+ years. I recently reworked several of the panels using as much of
the redwood as possible and using cedar when I had to replace wood.

The post that holds the large gate has rotted at the bottom (was
repaired a couple times) at the top of the last concrete pour.

My idea is to use the original redwood post but to use a pipe to
secure the post. My thought is to place a concrete filled pvc pipe
into the center of the post, perhaps 3-4 feet deep, glue (or screw)
the pipe inside the post and then set the pvc pipe into fresh concrete
(again about 2 feet down).

I'm not a woodworker and don't have a horizontal boring machine that
could bore a 2 inch hole in the center of a post 3-4 feet.

I've thought of cutting the post in half then routing out the
material, placing the pipe, then glueing the two halves together but
don't know if I'd just be introducing another failure point with that
long joint and weather seapage, etc..

Any thoughts on how a layman could tackle this, or should I try to
find someone with a boring machine? (dont know what heading that
would be in the yellow pages)