I asked Custom Built to design a frame for a large half-round stained glass window that I wanted over my front door. The finished product has far exceeded my expectations. The stained glass is sandwiched between clear glass panes. It has never rattled from vibrations. Over the course of this winter there has been no air infiltration and there is no condensation within the internal window cavity or inside the house. The price was excellent, much less then I expected. I congratulate Scott and his crew for a superior product. Anyone needing a custom window would be well advised to contact Custom Built first.