On Mar 9, 2:59 pm, wrote:
> On Mar 9, 7:51 am, "Andiez" > wrote:
>
> > ... Yike!! Do I need to leave a head
> > space when I use synthetic corks?
>
> You should leave 1/2 inch of ullage no matter what corks you are
> using.
>
> Greg

To be honest in my experience you sometimes need to leave more like
3/4" - 1" with a synthetic cork if you expect it to plug the neck
without soon rising above the rim. I presume it is their limited
permeability that causes this. With natural corks I have always
found 1/2" to be plenty. I have re-corked 6 or 7 wines when I'd left
1/2" gap before the synthetic so I try to be a little more liberal
with it now.

Jim