Swing the door over the full arc of its travel and mark it where it drags heaviest on the carpet.
Bottom door clearance for carpet.
I have never seen a door set with that big of a gap unless it was to get past floors that were not level.
That ll be about an inch with decent carpet and underlay.
2 pencil on the carpet and mark the door.
The radius of the pencil usually provides adequate clearance.
Sounds like a bit of deliberate misinterpretation.
The only criteria is that the door shouldn t scrape the floor when moving.
You may have to shorten a jam or two to do this.
If the door is dragging on carpet it works pretty well to put a no.
It should be high enough to allow for expansion swelling of some small degree if it s wood.
Exterior doors usually contact a threshold of some material.
If equal height of doors is not critical set the hinge side of doors 1 2 off floor to tuck in carpet.
Some are wood some have a vinyl flexible insert that seals against the bottom of the door to keep out drafts.
That is a lot of room for unlevel you have there.
When doors are installed to fit hardwood tile linoleum or any other flat floor covering clearance height from the bottom may be 1 2 inch or.
Do you really want an inch between the bottom of the door and carpet.
To fix the issue the doors need to be removed bottom of the jambs cut and reset the door.
Granted that s what he wrote but he clearly meant the clearance between the floor and the door to allow for the carpet and underlay.
If you need more room for carpet under door trim the door.
The standard i use is 1 2 over finish floors 3 4 is acceptable.