Van Chocstraw wrote:
Rich wrote:
"Oren" wrote in message
...
On Mon, 22 Dec 2008 18:27:58 -0500, "Percival P. Cassidy"
wrote:

Our front door has an aluminum alloy threshold, and we have just
noticed
that ice is forming on the indoor side of it; this, when it melts, will
not be good for our wooden floor.

What must be happening, I am sure, is that, because the outdoor
temperature is now well below freezing, water-vapor from the indoor air
is condensing an freezing on the surface.

Short of (a) replacing the threshold by a wooden one or (b) cutting the
aluminum one lengthwise and interposing a "thermal barrier" between the
two sections, what's a good way of solving this problem?

Perce
Lift the metal threshold out. Clean and put three beads of clear
silicon caulk down, maybe 1/2 inch bead or less. Place the threshold
back in place. No more leaks... in or out..



He doesn't have leaks he has a thermal connection to the below
freezing temps outside his door, that's causing humidity to freeze
then thaw and will ruin his wood floor. He needs to pull up the
aluminum and put down a good threshold that has a thermal break and
good weather strip and then his problem will be solved.

Rich

It's not likely conducting cold the entire 4 or 5 inches of threshold.
There must be air leaking under it to get frost on the inside.


It could... aluminum is a good thermal conductor. If it's cold enough
outside, and the aluminum is directly exposed to the cold, the OP's
explanation seems reasonable.

nate


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