desco windows. an excellent choice for your next project. since 1970, desco has earned its reputation as a high quality, service-oriented manufacturer for a diverse line of architectural windows. desco? five lines of aluminum windows have been engineered to ensure high performance in a wide variety of applications?chools, hospitals, office buildings, institutional buildings, and churches?n both new construction and retrofit projects. desco windows are manufactured to industry-leading standards, using only the finest materials available. our engineers continually advance our products, assuring your next project will be a beautiful, tough, conservation-conscious window.