On 6/22/2012 2:45 PM, Oren wrote:
On Thu, 21 Jun 2012 19:58:47 -0700, wrote:

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.

Looking at a top view, the silicone caulk would look like this before
the threshold is seated on the concrete or wood floor substrates.

|-------------|
|-------------|

Under the threshold (TH) .... not the outside edges.

Looking from top after the surface is cleaned of dirt, etc.

It protects water infiltration (and wind drafts& bug entry) and also
helps protect the door jamb (wood) from absorbing water.

Ask the installer if he sealed under the threshold.

Trying to add a cement mix (or even caulk on outside edges), after the
fact is (IMO) a waste of time and money. Okay for a final edge along
the TH.

I'm just saying this from experience given buy a _real_ contractor and
experience.

The installer can say what he did.

Yes, the installer did seal underneath the threshold. He is just going
to apply a concrete mix, or something similar, to apply on the outside
edge. At least it will look better.

Thanks.