I have heard Christians often say Noah was mocked and ridiculed when building the ark, but I cannot find any scripture to support such claim.
You're right, it says nothing about Noah being mocked for building the arc. One can only assume that was the case as rain was not seen prior to the flood so why would someone build such a large vessel?
Another point about Noah that is commonly tossed out is that he preached to the masses prior to the flood warning the world of the coming event. This point cannot be found as well.
