Don’t know what brand he uses. I paid $30k for replacing the windows and sliding doors in the rear side of the house. That was in 2008. Andersons and Milgard are mainstream brands.
Brand: Marvin.
Wooden frame. Stained to match the hardwood floor.
Windows and sliding doors: Each 7’ x 3’.
Ultrex fiberglass construction: Fiberglass facing outside, wood facing inside of the house