Negative Lippage-change out the tiles if there are extras which is the best way-
Let customer know that it is an issue.
After floor is polished try to work those areas with a Tampico brush.
Last resort use Tenax telux in the corners.

On Tue, May 19, 2015 at 11:30 AM, Baird Standish <> wrote:
Hi.  Looked at a job that has sporadic sunken tiles.  I didn't notice much of the kind of lippage where the tiles are uneven all around, but there are tiles here and there where one corner has sunk down below the level of the ones around it.  I don't think grinding would help much, but there could be a lot of hand polishing in those corners to get picture framing out if there is not another solution.  Does anyone have much experience with this situation?

From the desk of
Baird Standish
Managing Partner
Facility Specialists, LLC
15 West Highland Ave.
Suite E
Philadelphia, PA 19118
Phone: 215-732-7505
Fax: 215-546-9160
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Stu Rosen