AMBICO Limited was founded in 1955 and has become a world leader in the manufacture of specialized door and frame products. Although renowned for these door and frame products, AMBICO is also recognized as a leading-edge manufacturer of acoustic windows and glazing for high performance doors.
For over 75 years, the world's premier buildings have relied on Krieger Specialty Products for custom doors and windows that accentuate interior design while quietly operating as high performance sound barriers, security armor, radio frequency shields and more. Every Krieger door and window is manufactured to the size, style and finish requested.
Optimum Window Mfg. Corp. established in 1986, has made its mark in the window industry as the largest and most diversified manufacturer of Fire Rated windows in the United States.