I found a possible answer as to why Andersen doesn't sell vinyl if they invented them from another poster on the OLD board...
Author: anthony (---.proxy.aol.com)
Date: 09-05-03 21:05
The Renewal by Andersen product is by far the best product on the market. Im laughing like crazy due to peoples beliefs at "Life time warranties" Whose life time your pet goldfish. Those are usually only good for 7 years. The average home turns over every four years.
Remember home improvement is the industry that a company is most likely to go out of business in 5 years.
If you want to know about what garbage vinyle isgo to the journal of light construction "working with vinyle windows" it will open your eyes.
Use Renewal by Andersen, Andersen made the first vinyle window in 59' and never massed produced it. Why is that. Why would they put a composite out and not vinyle? Vinyle will warp twist and bow. Ask why vinyle windows have to locks. The salesman will tell you protection. Did you ever grow up with 2 locks on your wood windows? No, it's a weak point in the window!
Warping, twising and bowing is true. My old house had vinyls that did that.