What does it mean when new marble flooring cracks? Should I be weary?

Any time a hard surfaced tile is used on a floor, the subfloor needs to be prepped and any voids patched. The problem may also be that the subfloor was not strong enough to hold the weight and is flexing. The contractor is lying to you.

It was not installed properly. Have the tile guy redo it. Floor must be level.

Beauty of marble is. it DOES NOT CRACK if laid out properly. ur contractor is lying to you.

Main reason is that the under-flooring was not level or was sub-standard. Uneven under-flooring ALWAYS leads to instantaneous cracks in the stone flooring on top. Secondly, if the marble itself was of inferior quality, then also it will crack with the amount of weight which is being put on it, regardless of the status of the under-flooring.

and I know what I am talking about since I run a stone studio (with more than 50 stones in range inluding marble). My brother runs the interiors team which does the laying of stone, hence we know why the cracks happen!!

Simple test is to check the level of the floor with a water-mark. Check if the instrument lifts away from the floor at any point.

Get ur money back sweetie. or sue him. did u or ur father have a written contract with him to fall back on??

i answered this question in the other category

You should complain for it is lack of quality. maybe your contractor is trading your money for cheap materials to save money for himself

Be afraid, be very afraid.

It means that the subflooring is unstable and the contractor did not install blueboard to stabilize it.