Krieger Specialty Products
About Krieger
Since 1936, Krieger Specialty Products has been a leading manufacturer of high-performance doors and windows for applications that require acoustical, blast and pressure, bullet and forced entry, radio frequency, and other specialized needs. As a recognized leader in the industry, we are one of a handful of premier manufacturers of acoustical and other special-purpose door and window products in the world.

Originally founded as Krieger Steel Products in 1936, the company was purchased by Metal Tite Products, a California-based manufacturer and distributor of special purpose doors, and rebranded as Krieger Specialty Products in 1978. Today, Krieger is a third-generation family-owned company based in Pico Rivera, CA, where all Krieger products are proudly made in the USA at our manufacturing facility.

A Recognized Leader
Krieger provides industry-leading design, testing, manufacturing, and installation of custom special-purpose door and window products throughout the United States and around the world. We are recognized as the first manufacturer to introduce a number of major innovations in the specialty door and window industry. For example, in 1988 we were the first to break the STC 51 barrier with a 1 ¾" thick door without a raised sill; and in 2012, we pioneered hollow metal door systems with radio frequency shielding for access to Faraday enclosures with woven mesh wall materials.

Our products are installed in a wide range of applications including radio and television broadcasting stations, recording studios, theaters, hospitals, medical imaging facilities, museums, banks, retail stores, industrial and power plants, as well as municipal and federal government facilities, including those for the US Department of Defense.

Worldwide, Krieger continues to innovate and introduce advanced products that expand the possibilities for the architectural design and construction industry. Our experience and state-of-the-art capabilities attract the highest caliber of engineering talent to our team, professionals who are constantly pursuing research and testing to ensure our customers receive the most technically advanced products available. We are proud of our client list, which includes some of the most premier facilities in the world.

  • 1936 – Krieger Steel Products is founded, manufacturing custom door and window products
  • 1971 – Metal Tite Products is incorporated as a manufacturer and distributor of special-purpose doors for the construction industry
  • 1978 – Krieger Steel Products is relaunched as Krieger Specialty Products following purchase
    by Metal Tite Products
  • 1988 – First manufacturer to break the STC 51 barrier with a 1 ¾" thick door
  • 1992 – Krieger develops 60 dB radio frequency door
  • 1992 – Achieves STC 47 for a wood door, the highest STC rating at the time
  • 2004 – Produces over 500 specialty doors for award-winning Walt Disney Concert Hall in
    Los Angeles, CA
  • 2012 – Pioneers hollow metal radio frequency door systems for access to faraday enclosures
    based on woven mesh wall materials
  • 2019 – Launches an acoustical window wall with STC 52 rating, the highest tested acoustical
    product of its kind on the market
  • 2022 – Engineers industry-leading hybrid radio frequency 40 dB and STC 51 rating assembly
    with 1 ¾" door panel
  • 2022 – Develops 5 PSI pressure-resistant door system for nuclear power plant in Georgia
The vision of Krieger Specialty Products is to be the finest doorway that protects what’s valued in your organizational space.
The Mission of Krieger Specialty Products is to profitably manufacture protective door and window solutions for our customers’ energy dissipation challenges that address life safety, while providing a gratifying work experience.