OK I will try to be brief but give enough information so you can maybe help.<br />The house is 720 square feet on a Cement Slab built or thrown up during WWII for Air Force Officers housing. <br /><br />It has the original tiles on the floor. Back then they didnt have peel and stick but spread glue and put down the 9-inch tiles down. <br /><br />Over the years and with many earthquakes I think the cement slab has cracked in a few places. <br />The bedrooms have no heat so this is the only place where we can see a problem. <br /><br />Bedrooms are empty as we have been using the hide a bed couch in the front room while doing sheet rock etc.<br /><br />Everything was going fine until I decided to lay a mattress on the floor in one bedroom because the couch thing was killing my back. <br /><br />After the first week when changing linen we found the bottom of the mattress soaked with and standing water on the floor under it. Just in one spot about a 2 -foot square. And the tiles just lifted off.<br /><br />Tried using the other bedroom with the same results. <br /><br />My question is: Am I on the right track here? <br /><br />If Im correct I have a solution but want to make sure Im reading this right in the first place. <br />Thanks<br /><br />Link