The following is a rubber tile installation that had problems within days of the installation. Photos 1-3 are of the areas of concern. The complaints were two fold; a popping sound was heard when occupied chairs where rolled across the floor, and adhesive was oozing from the tile joints. Not all areas of the floor had these conditions; only around the desks could the problem be found. In Photos 4-6, a few tiles were pulled back to reveal what was going on beneath the floor covering. Do the photos give you enough information?
I should tell you that the adhesive used was a one-part acrylic and that the adhesive itself is not the problem, meaning the adhesive did not fail. Also you should see what the other areas of installation that had no problems looked like: Photo 8 is what the adhesive looked like in the non-problem areas.
Well, after asking a few more questions I found out that the areas with the rolling chairs had been re-glued because the tile was curling up at the edges, an apparent lose of bond issue.
When the repairs were done it appears that the tiles were set in wet and air bubbles were trapped, making the popping sound. Also when adhesive is oozing at the joints and nothing else has changed, indicating moisture in the slab, then it's a good bet that the moisture in the adhesive was trapped below the non-porous tile.
Because the first application of adhesive sealed the concrete to some degree, the moisture in the second adhesive application (during repairs) had nowhere to go! But is it fair to blame the installer for all of the problems?
He used the adhesive that was given to him for the job! Maybe epoxy should have been used where the rolling traffic (dynamic point loading) was to be! Or maybe smooth-backed chair mats in the area of rolling chairs may have helped?
You Make the Call!
Hope you had a Happy Holiday and thanks again for reading. Have a great day!