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.
My contractor just hung our fancy dancy un painted solid wood door slabs in my 100 year old house with solid hardwood floors throughout.
In the winter they let cooler air in and in the cooling season when your air conditioner is.
Jimmy c is right you do need some gap under your door to allow for circulation of air.
These doors come pre cut and pre hung and have only the smaller 1 inch gap under the door.
Water leaking around the door or water leaking under the door or door bottom.
A visible door gap between the door and door frame.
There are door sweeps that are made that are taller.
How to fix a gap under a door.
There is an approximately 1 5 gap at the bottom of the doors.
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.
Door gaps especially on exterior doors can be serious energy wasters.
A drafty door with chilly drafts air blowing through your entryway.
These work and look great in the homes we renovate and still provide the needed space underneath the door for the air returns.
Water leaking from the top of the door frame.
If you have gaps around an outside door you could be losing up to 15 percent of the money you spend heating your home by allowing heated air to blow outside.
How to fix a gap in an outside door.
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.
A sticky or stuck door that makes it difficult to close or open the door.
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.
When doing this we install pre hung doors purchased from our favorite big box home stores.
Normally though that gap isn t any more than an inch and usually only 1 2.