The vast majority of manufacturers complete the armoring of the doors in the same way – by placing several plates of armor steel inside the door.
Stick-welded 2 plates
Several plates fixed by bolts and stick-welding
This method allows the original plastic door panels to be kept and requires little time and effort. The problem is, -that there is no way such a door would withstand any serious side explosion – the welding, especially stitch-welding, simply cannot hold plates together strongly enough, so during the first milliseconds of an explosion these plates would detatch and fly inside the vehicle.
Fitting armor plates inside the doors also means leaving ballistic gaps when the door frames are from 45°.
Even worse, some manufacturers do not weld the plates at all – they just fix them in with bolts.
Armor fixed using bolts only
Obviously even a weak blast wave will tear such a structure apart. Besides that, bolts and joints expose additional ballistic gaps.
Without exceptions all customers who understand the importance of correct construction in armored vehicles require that the armoring of a door is done using a single armor plate:
Armoring using only one armor plate - this is how it should be constructed
Needless to say this is the only way that we armor doors.