On 6/21/2012 7:21 AM, Oren wrote:
On Wed, 20 Jun 2012 21:21:23 -0400, wrote:

are they noramlly shimmed underneath?

If necessary. Especially on sliding glass doors. Using a level to
check for level.

I put two beads of silicone caulk under the threshold and a bead under
each end at the jamb.

Prevents drafts and water seepage under the threshold. YMMV
I never thought about the water seepage. Thanks.