Signature Door Inc., manufactures custom wood doors, decorative glass, hurricane impact glass, insulated glass at their facil ... ity in Altoona, PA. *Made In The U.S.A. - It Matters! * Quick Lead Times *AIA Approved Provider *Miami-Dade Large Missle Hurricane Impact Approved *Texas Department of Insurance Approvals *Custom Decorative Glass *Made To Order *Finishing Available *Multiple Species *Iron Grills *Bi-Fold Doors *Operating Sidelights read more