Concrete question

[Dustin Barr]

I had a contractor who pour my drive way several years ago come in and do a new project for me, a new garage floor with patio, a sidewalk up to the house and drive way. It was poured in 3 different sections, garage floor first, patio second and driveway and sidewalk last.

When it came time to pour the driveway he came to me and said "the driveway really should have re-bar in it, I will order some" (NOTE:all other projects also had re-bar)

Well he ordered it and had it billed directly to me. Shouldn't this have been included in his estimates as all the other projects had re bar and I was never responsible for paying for it.. My guess is its just an easy way for him to save an extra $250.

I have not paid in full yet and feel that this should be deducted from the final payment. Thoughts?