On Fri, 22 Jan 2010 15:30:21 +0000 (UTC), HerHusband wrote:
I have installed several prehung exterior steel entry doors over the last
few years, and virtually all of them have minor leaks somewhere around the
bottom. The first was the entry door to our garage, which has now rotted
and will need replacing this summer. Obviously, I don't want any other
doors to rot like the first one, or worse yet cause structural damage to
the buildings.

The problem isn't the door; it is drainage around it. It is obviously
sitting in a puddle at times.

Build up the soil around it so water flows away. You may have to put
in a stoop or sculpt the lawn.