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Old 01-21-2006, 06:07 PM   #1
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Moisture in walkout basement after rain storm

I have just moved into a brand new house. It has a walkout basement in the back with a patio door. After the first heavy rain storm I noticed a couple of wet spots on the concrete under the door - really water stains, no puddles or accumulation. The builder said he would replace the caulking around the door to fix it. A couple of days ago we had a nother rain storm, and this time I noticed another similar wet spot (about 3 or 4 inches diameter) at the foot of the wall about 15 feet from the door. I called the builder back in, he says this is moisture that is being "wicked" in along the top of the concrete from outside and is completely normal as long as there is no puddling. I have posted some pictures of this here:

Have you ever heard of such a thing, or is my builder just trying to brush me off? Is it possible that the rain the water from the rain (the grass level is right where the leak is occuring) is "wicking" or seeping in over the top of the concrete slab under the brick wall or is this just an outright leak?

Thanks for any input.
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Old 01-22-2006, 04:09 PM   #2
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It's hard to see in the pictures, but is the yard sloping towards the building? It also looks like there's no vapor barrier between the concrete floor and the bottom plate. If this wood continues to get wet it will rot in no time. Also check the evestroughs on the roof above the patio door during the rain. There could be a leaky seam causing a small waterfall outside the doors.
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Old 01-24-2006, 12:45 PM   #3
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I say some leakage is occuring around both the sliders. a recaulk is the answer. the second spot is below what I assume is the kitchen slider and traveling down the wall to the lowest spot the basement. Prepare to have this problem every few years as caulk does breakdown and if this wall faces the prevailing winds where heavy rain comes from I'd keep an eye on it even after your warranty period is up.

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