You should only be learning about the window features and relative costs so you can be better informed when you discuss the issue with the design-build contractor. A window supplier can only spend a limited amount of time with a homeowner so it is the contractor who should be trying to expedite the design. If the contractor doesn't know enough to talk to you about windows he shouldn't be offering design services.

This situation is one that led us to be our own GC. If I'm going to have to work with the Subs on what I want, then why am I hiring a GC? Especially a "design/build" company. Correct me if I'm wrong, but my impression of a design/build is that you go to their office, and they have examples of all your choices right there. They can answer any questions about what products and techniques will be used in the build.

Well, a GC does have other responsibilities and does offer certain advantages to an owner. In fact, it is very rare that a homeowner has the necessary knowledge, time and temperament to be successfully act as their own GC.

Our GC sent us to the window guy to discuss windows. We didn't even have a window schedule. They were MUCH more helpful than the GC, and gave me much better info than the GC would have. Talking to subs is one thing, but talking to a good window salesperson who is knowledgable and sells several DIFFERENT brands of windows is completely different. I actually have talked to two window ppl so far...the one my GC sent us to, and another one that my friend is using.

OK. Thanks for talking me down from the ledge. The GC did make a suggestion for windows, but I needed more than just his recommendation. Thank you for sharing your experiences.