Thanks for the responses to my post. The windows are casement windows. I just opened one of them and it looks like they could probably unscrew the window from the support bracket and replace it. I haven't talked to Champion yet because I want to be more knowledgeable before I do. There were so many problems with the quality of the windows and the install that I don't want to have any doubts about the accuracy of what they tell me, so I'm still hoping someone can tell me how the seals in a double pane window can be tested. Quite honestly with the history of this install I'm worried about whether or not I can trust any replacement they make for me. The windows do have the Good Housekeeping Seal of Approval and Champion is a member of the Better Business Bureau, so I may end up contacting both of those agencies as well.

Probably a dead post, but I'd agree with Mendo view. Using a new razor blade to clean stickers, paint, silicone etc is very common practice and should not damage or scratch the glass if care is used... I can't comment on the "rough side of the glass" statements, but some caution should be exercised in the even that there is a coating of low e on the interior surface that could be more prone to scratching. That may be what happened here...

+1. If you are looking for break in protection, it needs to be the exterior lite ideally and perhaps both.

Yes yes, yes! Of course the ones in your picture are probably either steel or bronze windows which are more expensive than you can possibly imagine. How do I know? I fell in love with one, called all over the country for prices and discovered that my box bay would be $10,000, $400 for shipping and another $10,000 to install. SOOO....I had my painter paint the existing muntins and the mullions black. It looks fabulous and sure was a LOT cheaper. I'm trying to add photo but not working...