"concrete smell" Answered
Some 20 years ago, I built an addition onto my house. It is built on a concrete slab with 42 inch block foundation. I have a completely finished room in which I have installed ceramic tile flooring. Under the ceramic tile I used Ardex to level the concrete before tiling.
For the last 20 years I have never noticed what now appears to be a "wet mortar joint" smell.
I have become increasing alarmed about the slab leaching moisture into the room. There is no visible sign of moisture. The tile is not exceptionally cold; it's just that smell.
Can anyone put my mind at rest, or suggest to me what this might be and how to remedy it. I definitely can not destroy the floor.