I think it is too big and think a 1 4 1 2 gap would accommodate any unevenness in our floors and allow us to use area rugs.
Gap under door too big.
Door gaps especially on exterior doors can be serious energy wasters.
Water leaking around the door or water leaking under the door or door bottom.
Higher quality pre hung doors are usually manufactured with 1 5 clearance under the door as described above assuming the flooring will be premium as well in the 3 4 range.
Bugs crawling under the door.
A visible door gap between the door and door frame.
Be careful not to overdo it and seal the door so that it can t settle with the rest of the house.
If you have a large gap at the bottom of your door that may be helping the door to stay plumb.
These doors come pre cut and pre hung and have only the smaller 1 inch gap under the door.
In the winter they let cooler air in and in the cooling season when your air conditioner is.
Water leaking from the top of the door frame.
Jimmy c is right you do need some gap under your door to allow for circulation of air.
When doing this we install pre hung doors purchased from our favorite big box home stores.
A drafty door with chilly drafts air blowing through your entryway.
There is an approximately 1 5 gap at the bottom of the doors.
How to fix a gap under a door.
As long as the gap is even on an interior door it shouldn t be why a door isn t closing properly.
Unfortunately the undertrained part time people at the big box stores don t know this.
A sticky or stuck door that makes it difficult to close or open the door.
My contractor just hung our fancy dancy un painted solid wood door slabs in my 100 year old house with solid hardwood floors throughout.
Normally though that gap isn t any more than an inch and usually only 1 2.
These work and look great in the homes we renovate and still provide the needed space underneath the door for the air returns.
Cheaper pre hung doors give about 1 1 25 clearance and this is because the rise of thinner floor systems for the mass consumer market.