A wet spot appears in the middle of my wood floor whenever it rains.
I've recently replaced the roof but the spot continues.
Yesterday, my chimney guy went under the crawlspace and said that the
spot is mold that "activates" whenever it rains due to the humidity
and I need to rip out the entire hardwood and subfloor. He wasn't
trying to sell me this service as he doesn't do this.
Is it possible that the mold would "activate" and look wet due to
humidity? The chimney guy said that there are no "trails" leading to
the wet spot and that there is nothing wetting the floor from the
underside. This is an old 1870's house that I just purchased. He said
that the floor must have been saturated a long time ago and the mold
started at that time. He said that the mold is in small areas and
looks white and fluffy kinda like the freezer burn you see on ice
cream that stays in the freezer too long.
Any help would be appreciated as I prepare to remove all of the the
Well some things jump to mind:
1) check under the crawl space when this wet spot happens.
Run a cord under theere NOW while it's dry (unplugged).
Also, you might hit your generic store for a UV light, I
don't know about house molds, but I recall taht a bunch of
molds that you can't easily see in regular incandescent, light
up under UV. $6 at the overpriced hardware store and you
can use it for your spiderman poster later ;)
2) get a second opinion on ANYTHING that might cost you $THOUSANDS.
3) nothing will prevent that from coming back, if it's there. The
spores are there. ventilation and fungicides are appropriate to
kill the mold.
4) get another opinion on the cause and the solution.
if it's there, like he says, then you should SEE IT YOURSELF.
A wet spot is not the same as mold or mildew. A puddle? Check the
roof, especially if there is a wet spot or stain on the ceiling above,
or a dripping light fixture above the puddle. We helped a friend with a
leaky roof - the actual leak was warped deck on roof with a loose
shingle on it. The water dripped onto a rafter and followed the rafter
to the center of a bedroom, running down via the ceiling light fixture
in the center of the room.
If the crawlspace is too wet, it needs to be assessed for drainage,
waterproofing and ventillation. The "chimney guy" is not the guy to do it.
If the underside of the floor is rotted/moldy, and you have new
flooring, you have a seller who concealed a problem. Wet subfloor
should be causing older flooring to warp or show other signs of dampness.
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