Everything the rest said above but, in regards to the warranty:
Check with your Secretary of State and see how long they have been in business. If they are giving you a 10 year warranty, but have only been around for 6 months, then who cares? They won't be around long enough for you to have a warranty issue.
On the other hand, if the one around for 2 years has been around for 10 years, then they probably know that no one calls them for legitimate warranty issues 10 years later, and simply cuts it short so that they aren't called back to fix work that they didn't do.
Who is the builder sub-contracting the work to? THere are companies that do nothing but gutters. THere are also siding companies who handle the gutters.
What they said! Typically gutter installtion is its own trade.
Gutters are installed by specialized gutter contractors. They will make the gutters to fit your home with the least amount of seams.
A gutter installer. Some times a siding installer will, but usually it's a separate trade.
I agree, no less than 4/12 but the sheathing must be layered 100% with Ice & Water memebrane first.
The minimum pitch for an asphalt roof for Asphalt shingles is 2/12 or more as long as you use at least one layer of ice and water shield and one layer of synthethic felt under the architectural shingles. I would never use a three tab shingle on this low pitch roof. Below 2/12 pitch, I would use either an EDPM Membrane or the Resisto 2 0r 3 ply roll roofing membrane system.
Recommended not less than 4:12 pitch. Also would advise in Western NC to install ice & water guard in place of standard underlayment.
If you are asking about how to repair the roof damage, then I would like to suggest you to go for insurance claim process if you are already done with an insurance of roof damage. Because the plumber will cost you more, so you take some helpful hints from the Public adjusters about how to get the maximum claim amount on the Roof damage.
A good way to add value to your house is to do home improvement. Many renovation and home additions add value to the house. Also, painting by interior painting San Jose is a good way to add value to the house. One of the simplest and most cost-effective improvement is house painting. Low-maintenance landscaping also adds value when you sell your house.