> My idea is two remove the threshold and attach something to the bottom of
> the door  to prevent water from entering the main building  area when I
> power  wash, keep dust and  bugs, spiders, snakes and rodents( if they were
> to show up in the future)   from entering the processing area and  keep heat
> inside.

You need a "vinyl door sweep".  There are versions that attach to the
underside of the door and versions that attach to the inside surface
of the door.  The bracket is aluminum, and the actual "sweep" is vinyl.

> Also the solution must be able to be approved by the health department.

I have no idea what the health department might say, as a determined mouse
could clearly chew through the vinyl.

                jim

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