In alt.home.repair, on Thu, 12 Dec 2019 10:59:36 -0800 (PST),
wrote:

Hi,
I have an exterior metal entry door and noticed that the doorsweep fell off the bottom. When I looked closer, I realized that the interior of the door is made of wood and the bottom INTERIOR frame of the door had rotted out completely and fallen away.

Photo he
https://i899.photobucket.com/albums/...psqhwr5yd2.jpg


Rest of the door works fine and is solid so, ideally, I would like to just chisel out a little more of the rotten wood from the bottom, and replace with a new piece of wood in order to make it solid again.

Has anyone had similar experience with such a door?

No. not with the wood part. My door's aluminum flange got bent up and
I had to rebend it so it would slide into the threshhold.

Any pros/cons to repair?

Most cons end back in prison after a few years.

Maybe use treated wood with stainless screws?

Is it wet a lot? How old was the door? If you use treated wood, be
careful not to breathe the sawdust, but if the non-treated wood lasted
20 years or more, that seems good enough.

For that matter, the major purpose of the bottom piece of wood is to
hold the sweep. If you're not going to replace the sweep itself, a
piece of foam rubber or styrofoam placed firmly, or with caulking, in
the spot will be insulating just as well as wood, but you may well have
a cold breeze under that.

Thanks
Theodore

They probably sell sweeps separately. If not, maybe you can find a junk
door, like at a Habitat store, or some other place that sells used
building material and take out it's bottom piece of wood complete with
the sweep. OTOH, my door has a metal piece that slides into a groove in
the threshold, and that's probably more wind-resistant that the sweep
that fell off. I'm sure uyou can can buy one of those separately if
you're willing to redo the threshhold.