Try searching on Youtube. See link below. Lot's of videos, will give you a general idea.

Here is a link that might be useful: Youtube link to window install

What kind of windows do you have currently? Some installs are more complex than others and what you have existing will dictate what will be required.

Thanks for the video links.

We currently have aluminum double pane windows and will be replacing with either Don Young TBA or Soft-lite vinyl. I'm waiting on a Don Young quote before I make a final decision. The outside of the house is a mix of limestone and Masonite.

I would have each company tell you precisely how they install their windows, without leading them in any way. If you lead them, they'll tell you what they think you want to hear.

Minimal expanding closed cell foam is the best way to seal the perimeter of the window against air and vapor infiltration. Unfortunately here in Texas most companies use the minimalist caulk-and-walk method that doesn't serve the homeowner well.

If you'd like to discuss further, feel free to give me a call.

Good feedback Ultra Windows.

Vetting the contractors installation is certainly an important evaluation criteria.