replacing roof
#1

I have been getting estimates for a new roof gutters facia and sofit. I live in the Chicago area and have a 3 step ranch house. On the south side the shingles are dry and curling. No leaks. One roofer says I need the whole roof removed another said just the bad side. Who is right? they are both going to reshingle the entire roof. I have a three foot overhang in the front and back with about a foot on each side. One said I need an ice and water protector the other said no because of the over hang, Again who is right?? Thanks for any advice you can give me.