They are going to remove shingles on valleys and low slope of roof, install weather shield stuff, and re-shingle.

EFIS siding or Asbestos shingles or siding8.

There was some patch work done and the original contractor who fixed this made no effort to match the shingles.

I did a re-shingle on a duplex in 2005 and the roof completely failed last year. 

The homes all have new metal roofs or shingles that have been done in the last 4 years.

Roof size approx 2700sq feet- gaf woodland lifetime designer shingles (gives the slate look similar to what's on the house) - If I choose plain architectural shingles, I'll save 2k- TPO PVC flat roof over 10x30 extension- soffit & fascia repair and replace where necessary (some of the soffit wood has gotten rotten and would need to be replaced)- chose copper valley instead of aluminum (said I'll save $500 if going with aluminium)- plywood mostly in very good condition because of great original quality of the wood (said I'll probably only need 3 sheets replaced)- replace downspouts where necessary, maybe he'll replace 1-2- install cobra ridge vent

It would be like replacing a good slate roof with shingle..

They mentioned to us about roof damage and reminded us about the shingles that flew off during Hurricane Irma.

Then every once in a while he would reply about some problem he had, he apologized and said they would start on Monday.When I asked for my money back, he then told me that he had bought all the shingles, so he couldn't refund all my monies. 

According to the inspection report, there are 3-4 layers of existing shingles under the newly installed roof.