Profile: Glass Doctor offers glass services such as replacement windows, tub and shower doors & enclosures, entry door glass, mirrors & custom tabletops. Our glass products include insulated glass replacement, glass windows, shower door, mirrors and tabletop furniture. Our table top furniture is used to measure and fit replacement glass table tops for existing furniture, and new table tops to protect wood furniture. Our brands include Glass Doctor®. Our insulated glass units are also called IG units, and these units are windows made from two or more pieces of flat glass separated by a sealed air space. They are used in the home & at office.