Our contractor installed this door without using all the screws (or perhaps the door came without enough screws). Every hinge on each side of these double doors is missing one screw on the frame side. Is there some hidden wisdom here?
Just some notes:
- This is just plain lazy. Maybe he forgot but forgetting = lazy.
- Maybe he ran out of screws. But these are basically the most common type of door screws so again that goes back to being lazy.
- When installing doors it is best practice to get at least one screw per hinge all the way into the actual framing of the wall. This requires some pretty long screws - 2-2.5" at least. He may not have had those screws on him. Again that is not planning well and shouldn't have been left like this, which is lazy.
The door comes already attached to the frame, with all those screws you see. These are rather short screws as they can't be longer than the thickness of the frame, since it's an assembled unit.
The missing screw on the frame side is to be a long screw. That goes through the frame, through any surface material in the hole in the wall, and into the structural member of the wall.
Use the longest deck screw you can find, if you don't care about the finish (or paint over them). Drill a pilot hole, and use lubrication. The wall stud is already dry, and if you overestimate the length of screw needed it can jam so hard that it breaks the bits on a power driver rather than turning any more.
Doing this correctly will prevent the door from sagging over time. Retrofitting such a long screw for one on the top hinge can improve a door that has sagged.
It may or may not have something to do with superstition. As far as my memory of Superstition of the old goes, horse shoes and other things that had to be fixated with nails and other things were generally only fixated with 7 units.