Hi Peggy,
It can vary widely based on what kind of window you have now (aluminum, wood, vinyl, etcl) as well as if you have brickmould casing on the exterior etc. It can be up to 5" different. Just ... read more
In regards to roofing, Owens Corning has a great checklist and you can find it at the link below! Here are just a few items to check though:
-Accredidation and good standing with the BBB
-Additional ... read more