I had a new driveway installed back in october of 08. The installer went over the exisitng driveway becasue he said it was sound enough and i would have no issues. I own a masonry business and tend to start form scratch when i do things. He assured me he does this all the time. We also extended the driveway a few feet. Long and short of the matter, come jan, feb, noticed sinking on new section of driveway. come april, i can see a lot fo the old outline of the driveway. I just did a major roofed patio etc on front of my house, and the driveway looks like

. after a few phone calls, i got the guy back, and he has no idea why his work is sinking. He said he would "repair" the area and melt with a torch to blend. I think this is going to look like crap. Should he have put a base coat in on the extension first, and let it sit before doing top coat? He did the job in one day. I think i am going to cut out sinking area to see what is causing the problem. this would look better than a patch over top of the existing. I have pics, but not sure how to post. If there are any thoughts i would appreciate them.