Capitol Glass has been providing Alaskans with glass, mirror, insulated glass units, specialty glass and high-quality windows for residential and commercial applications since 1951. Alaska’s only nationally-certified insulated glass and window manufacturer. Formerly known as Capitol Northerm, we build custom windows developed through decades of experience, designing and making windows specifically for Alaska’s northern climate. Built in the north, for the north, Capitol Glass windows and doors are your best choice for keeping your home warmer (and quieter) while saving you money on heating your home.