comparison image of the NVS door to traditional putty filled edge doors

The newest innovations in hollow metal, from the first hollow metal door company in America. NVS - No Visble Seam

Continuously Welded...and No Putty.

Introducing the new, patented, NVS door from Mesker. The FULLY WELDED, Seamless Door that more than TRIPLES the STRENGTH of a normal door, with NO PUTTY or filler.

Putty is Temporary. The NVS structural hot weld is FOREVER. WE GUARANTEE IT WITH OUR LIFETIME STRUCTURAL WELD WARRANTY.

comparing the amount of pounds of force that different types of door can withstand in the SDI Twist Test

A New TWIST on Seamless.

The Steel Door Institute requires that all doors meet rigid test requirements to maintain the highest quality standards for life safety and security. In the SDI Twist Test for steel doors, a door must meet the following criteria in order to pass the test and meet the standard set forth: At 300# of force, the door must deflect no more than 1-1/4" in the opening. When the pressure is released, the permanent deflection of the door must not exceed 1/8" in the resting state.