
Mortise Lock Installation: The Commercial Standard for NYC Storefronts
The mortise lock is the workhorse of New York commercial security. Unlike a simple cylindrical lockset that bores a single hole through a door, a mortise unit is set into a deep rectangular pocket carved into the door edge, housing a full-length case that contains the latch, deadbolt, and often an auxiliary function all in one body. That inset design distributes force across a much larger area of the door stile, which is why you will find mortise hardware on virtually every serious storefront entrance from Midtown to Inwood. Our technicians are skilled in mortise lock installation across every major profile — ANSI Grade 1 single-cylinder units, rim-cylinder configurations on metal storefronts, and high-security mortise cylinders with anti-pick and anti-drill pins for locations that need an extra layer of protection.
Proper mortise installation is not a drill-and-go job. The mortise pocket must be cut or verified to exact tolerances, the strike plate must align precisely with the keeper in the frame, and the cylinder must be set at the correct depth to prevent cam slippage. Our team brings the specialized chisels, routers, and measuring equipment needed to do this correctly the first time, and we work damage-free wherever the existing door and frame allow it. If you are replacing an old unit, we assess the existing pocket before recommending a direct-fit replacement or a slight mortise modification — saving you unnecessary door work and cost.

