A1 windows & doors LLC was established in 1989 in the Farmington Valley and still to this day operates from the Farmington Valley in our new state of the art showroom. A1 windows & doors is owned and operated by David Urbach, who is still 27 years later, one of the installers for his company. All of our installers are employees of the company, not sub-contractors. We specialize in the complete line of the year 2015 compliant energy star rated windows and doors, as well as many styles and colors of vinyl siding. All of our windows are doors are backed with a minimum of a 20 year warranty.