Water Collecting Beneath Tile - Flooring - DIY Chatroom Home Improvement Forum

Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Flooring


Thread Tools Display Modes
Old 06-04-2011, 03:31 PM   #1
Join Date: Jun 2011
Posts: 2
Rewards Points: 10

Water collecting beneath Tile

We made our bathroom larger and I had to remove several partial tiles in order to continue to tile the new section. The existing floor has 18 X 18 porcelin tile on a concrete slab with polyurethane grout. When I removed the tiles there was water beneath them, collected in the gaps in the mortar left by the trowel. My first thought was the toilet gasket was leaking but after removing the toilet there was no evidence of leakage. Next I tested for a water leak in the slab by reading the water meter and waiting 4 hours. The meter showed no flow. None of the sink supply or drains show any evidence or leakage. The bathroom has a shower stall but there is a 3" step down into it.
How likely is it that small amounts of water from stepping out of the shower would penetrate the grout and collect beneath the tiles? Even if this did happen I would think the concrete slab would absorb and dissipate the water.
Before I tear up all the tile, any thoughts on a source of this water?



Jeffs72a is offline   Reply With Quote
Old 06-04-2011, 04:03 PM   #2
NACE Coating Inspector
mustangmike3789's Avatar
Join Date: Apr 2011
Location: Florida
Posts: 524
Rewards Points: 500

is this a tile shower stall. if so,plug the floor drain in the shower. fill with water just below the curb cap. wait 12-24 hours to see if the water level drops or if more water migrates under the tiles. if it is a fiberglass shower base, it could be leaking at the drain.


mustangmike3789 is offline   Reply With Quote
Old 06-04-2011, 04:42 PM   #3
Join Date: Jun 2011
Posts: 2
Rewards Points: 10

The shower is tiled but the shower floor & drain are 2-3" below the bathroom floor elevation. I will try putting a couple of inches of water in it. If that is the source it should migrate thru quickly with standing water in it.
Jeffs72a is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
low domestic hot water flow with tankless coil mike42 HVAC 28 11-24-2011 08:35 AM
My hot water recirculation system is a disaster Michael Neill Plumbing 9 11-05-2010 11:31 AM
Testing 12 year old hot water expansion tank? DJfixer Plumbing 2 01-01-2009 08:09 AM
Filling a Cast Iron radiator system insulatorpro HVAC 7 10-06-2008 11:31 PM
Periodic release from (I think) the T&P valve on the water heater alexz Plumbing 3 08-15-2006 10:31 AM

Top of Page | View New Posts


Search Engine Friendly URLs by vBSEO 3.6.1