Moisture enters things like doors knobs through a process of thermal
pumping where alternate cycles of heating and cooling cause the
doorknob to "breathe".
Anything hat will break the cycle will stop the leak, keep it at a
constant temp or seal it.
You definitely don't want to prevent the moisture from getting out the
outside and being trapped internally--that will simply cause even more
damage than it is at present.
If this is actually just condensation in a lockset cavity, I'd suggest
at most a thermal break like the wall outlet covers or something on the
inner side at most.
If there's really liquid water running out the outside, I'd be more
inclined to think there's a leak in the door skin or around the
escutcheon, etc., and external rain/snow/etc. is getting in and then
you're seeing it on its way back out.
I'd pull the lockset and see what's actually happening; I'm having
trouble thinking simple condensation would do it as there's not enough
volume of air it would seem unless there are large leak paths and
there's an extremely high humidity issue.
Someone asked this question before and I found
where somebody had patented a doorknob insulator.
I just found a company that supplies something
called "Great Grips". One of the things they do
is insulate the doorknob. It may work for you.
Guess it's possible there was a poor installation job, but that wouldn't
seem to explain condensation (assuming, again, it really is condensation
and not rain/snow melt).
I'm curious as to the type of door and the location and the actual
quantity of moisture and where it actually is originating.
I'd still think it highly unlikely condensation alone could be the
source of water running from the lockset cavity out -- I could see
condensation of moisture on an exterior surface from very humid outside
air; I can't see sufficient leakage volume for significant moisture from
the inside out.
The doors are Masonite exterior steel doors, and one door opens to the
outside, the other door opens up inside the unheated garage. Both
doors are running water out the doorknob plates to the cold side. I
noticed yesterday that there is condensate forming around the edges of
the door too, but not in such large quantity as through the doorknobs.
You taken the locksets out to see what's happening? I find this an
incredible scenario still.
I'm wondering if the doors weren't stored outside before hanging and the
cladding is full of water that is the source. It just doesn't seem
possible to have the amount you seem to have from simple condensation
alone through an essentially closed-off <3" diameter hole.
How 'bout posting some pictures on one of the hosting sites? I'd like
to see this phenomenon. If it's so, I'm jealous of anywhere that has
sufficient humidity to even have any condensation as we're dry beyond
the pale even by our expected winter months...not to mention we're 20+F
above normal w/ 30-50mph winds last few days and at least another one or
two to go...far too warm too soon and we're already pushing moisture
numbers lower than the '50s leaving only the '30s as as dry or drier... :(
Assuming the doorknobs on both sides are hollow, I would put some sort
of foam inside them...there are craft paints that "foam" when applied,
but just about anything foamy should work to keep warmth from passing to
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