Since 1947, Capitol Fireproof Door has been manufacturing and installing the highest quality fireproof doors, frames, and kalamein lot-line fireproof windows. Family owned and operated for three generations, Capitol Fireproof Door provides free estimates and site surveys. We offer custom solutions and designs to meet fire code and safety requirements, while maintaining the integrity of your building’s architecture. We provide solutions for fire code violations.

Serving the New York Metropolitan and surrounding areas since 1947, our team at Capitol Fireproof Door/Mercury Lock & Door Service prides itself in exceeding the expectations of our customers. We can manufacture and install fireproof doors and windows for all types of businesses and residences including apartment buildings, office buildings, nursing homes, hospitals, senior housing, hotels, schools, churches, corporations, private residences, factories, medical labs and government and public institutions.

Capitol Fireproof Door proudly serves all 5 boroughs of New York City: Manhattan, the Bronx, Staten Island, Queens and Brooklyn. We also serve Westchester, Long Island, Nassau County, Suffolk County, Rockland County, Orange County and Putnam County in New York, as well as Bergen, Passaic, Essex and Hudson counties in New Jersey.