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Question DetailsAsked on 5/11/2016

is water under tile floor getting in thru window

is water under floor tile coming in thru window

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1 Answer


Normally the answer would be no, especially if in a bathroom (where water from leaking shower, poeple getting out of shower dripping wet, or leaking toilet wax seal would be the normal cause), but can happen.

You would have to try to track where it is wet - you might be able to pull off some base trim molding at the base of the wall under the window, and if the tile does not reach tight to the wall check in the gap against the wall for dampness - by hand or with a flashlight looking for reflection from water or for staining. If tile reaches tight to the drywall, ALMOST always leakage in a wall down to the floor will cause staining of the bottom of the drywall - typically a slightly orangish or brownish water halo stain just above the floor, but if wall does not have a base trim piece don't confuse floor mopping staining with leak water staining.

Otherwise, might have to pull the base trim strip and poke a couple of small holes in the drywall (where trim strip will cover spackled repairs so you don't have to match paint) to make a large neough hole to stick your finger in to feel if the insulation or the bottom wall plate (bottom horizontal 2x4 or 2x6 or whatever) is damp - of course, that test only works when floor is getting wet. However, if trim is small that does not work, because you need to check about 2 inches off the subfloor sheating so the hoel is above the bottom plate - so a 1-3 inch trim will not cover the hole, 4" or wider commonly will.

When signed in as a user, you will also see links to about a half dozen related issues with responses right below this answer.

Answered 4 years ago by LCD

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