On 4/19/2012 8:07 AM, Rebel1 wrote:
In my original post, I asked:

The real question is why should just one of the doors warp? Both are
exposed to the same temperature differentials. Both doors have outer
storm doors with glass panels during New Jersey's winter season.

At a more basic level, the warped door is in its closed, locked position
almost 100% of the time, with usual entry/exit via a car in the garage.
So why didn't whatever force that caused the main door to warp (be it
moisture or the quality or cut of the wood) get transferred via the lock
and deadbolt to the mating entry door, which is rarely opened, and cause
it to warp an equal amount?

Someone suggested that moisture entering via an unfinished bottom edge
could contribute to the warping. If so, why wouldn't the warp occur near
the bottom, which isn't restrained by the adjacent door the way the lock
area is?

To install a lockset and deadbolt requires mortising into the lock
stiles of both doors. I've never seen these recesses finished. Seems
far-fetched, but this could be the entry source of moisture if in fact
moisture is the cause.
....

I was the one that suggested that was one place for an entry of
unbalanced moisture entry. As for the "why" in your follow-up, I can't
see your door from here to try to analyze specifically.

For example, I don't even know the warp is actually in the middle (and I
sorta' expect it isn't, or at least all) but is actually spread along
the length and just shows up at the lockset owing to needing the extra
force to take out some of the twist/bow/warp to close the door against
the stop of the other door.

Pictures and measurements might help but it's one of those things that
from afar is very, very hard to diagnose specifics altho general
characteristics are able to be outlined. In general, a movement in wood
after some period of time is going to be owing to a change in relative
moisture and/or combined w/ temperature that causes either an increase
or decrease from a prior equilibrium condition.

You didn't do something like add a kickplate or somesuch relatively
recently by any chance?

Has it been exceptionally humid or dry or other weather extremes? Or
have you added/modified the HVAC in the house that would either make it
much more or less (hopefully not) weathertight or change the RH
significantly (add humidifier over the winter or somesuch, say)?

It's also _possible_ that the problem is that there has been some
shifting in the door frame that has introduced some twist into the
opening that is apparent as the one door appearing warped relative to
the other.

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