32 years of hangar door manufacturing experience Spec-Dor's aircraft hangar door solutions dramatically increase efficiency, lowering operating costs and minimizing downtime due to mechanical failures. Spec-Dor hangar doors integrate a broad array of robust and time-tested proprietary technologies - backed by best-in-class engineering and processes for design, fabrication, installation and maintenance. Learn why Spec-Dor's expertise and patent-pending technology make it the most sought after hangar door provider in the world.