Since 1864, Mesker Door is consistently leading the way in serving the building industry. Mesker's commitment to Quality, Service & Excellence is evident in all our product lines including Commercial, Industrial and Institutional Metal doors and frames. Our products meet or exceed all Steel Door Institute (SDI) and Architectural Design Specifications. Mesker Door is approved for fire rated labeling with UL, WHI and FM. Celebrating over 135 years of service to the building industry, Mesker is continuously expanding its capabilities and service by its merger with Los Angeles Fireproof Door to become your complete hollow metal supplier.