DA wrote:

Hello all,
I have a two-bay garage door that has a pesky problem: every time it
rains water gets collected inside the panels and then drips on you
and stuff inside the garage when you open the door. It looks like
there is usually enough water collected for two to three days of
those unwanted showers. It does not even have to rain hard.
The door itself is just sheet metal panels (plus the spring load
hardware and cables of course). It's hard to see how water is able to
stay in there. But I am wondering if there is a way to prevent it
from getting in there in the first place. Is there something I can
seal without obstructing the movement of the door?

It's either condensation from high humidity and cooler indoor air, or
leaks. Fix a condensation problem with a dehumidifier or better
ventilation. Fix a leak problem by finding the leak and plugging it.

Also, it's getting colder now and sheet metal does not look like a
good thermal shield. Are there thermal insulation products out there
that can be installed on an existing door?

Get thee to a garage door company. They'll be happy to sell you some
foam sheets that will fit right inside the door panels with a little
creative carving. You'll have to have the door springs rebalanced to
make up for the added weight.

--
Steve Bell
New Life Home Improvement
Arlington, TX