tile lippage

About a year ago I had a tiler in to do about $9000 worth of tiling. I supplied the tiles, 300 x 300 rectified ceramics. After the job was complete I pointed out what I thought was excessive lippage and the tiler blamed the tiles that I had supplied. He hasn't yet told me exactly was wrong with them. As a result I withheld payment of $500.

I have checked the flatness of the remaining 25 tiles by placing them on a ground flat stoneware bench top. There is no perceivable "rocking" that I can detect, which would indicate that the tiles are flat????

The att photo shows a 3mm dia. drill under a straight edge at the worst location. There are another 9 places where a 2mm dia. drill passes under.

As I understand it, AS3958.1 and "NSW Fair Trading guide to Standards and Tolerances" allows a maximum of 2mm lippage.

Thoughts/opinions of other forum members????

Thanks.

Was the subfloor screed to ensure evenness?

The floor itself is 18mm Hardiepanel FC sheet. The tiler himself did the waterproofing and the graded screeding.

As far as I can see, AS3958 clearly states "Tiling is defective if the lippage between two adjacent tiles exceeds 2mm."

re grouting....that same AS3958 states "finished grout is defective if not uniform in colour, smooth, without voids, pinholes or low spots." Also, "grout is defective if it becomes loose within 24 months of handover."

My grouting conforms to none of those!!!!!

Get another tiler