Most manufacturers leave a 1 3 8 1 1 2 air gap on prehung doors.
Interior door clearance to floor.
My contractor just hung our fancy dancy un painted solid wood door slabs in my 100 year old house with solid hardwood floors throughout.
Our existing floors are mainly tile but the doors swing easily over the bedroom carpet.
Cutting off the door without raising the threshold may result in an improper seal.
There is an approximately 1 5 gap at the bottom of the doors.
Adjust the gap around the door and let the other side jam fall where it may.
The space between the floor and interior doors is 3 4.
He was looking for about 1 8 to 1 4 maximum.
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.
The awi gives no minimum but a maximum of over 3 4 is unacceptable.
I keep bathroom doors 3 4 to 1 to help the airflow.
However yesterday when my client arrived home he immediately called me to ask why i cut so much off the door bottoms.
I definitely like to keep that as a minimum for closets maybe even going to 5 8 figuring they might get too stale inside otherwise.
Other interior doors i like to keep right around 1 2.
If you decide to cut off an exterior door make sure you have a plan for sealing the bottom of the door against the threshold when the door is closed.
This is a good topic that will surely lead to some nice debate.
If equal height of doors is not critical set the hinge side of doors 1 2 off floor to tuck in carpet.
I just took a quick look at some of standards and regulations governing door undercut which is the distance between a door and finished floor as opposed to clearance which is door to sub floor.
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If you need more room for carpet under door trim the door.
Normally i cut the door bottom to leave about 1 of clearence and have never had anyone complain.
Interior door height off floor.
Interior door clearance to floor.
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Interior door height off floor.
If the door is not clearing interior flooring the better fix is often to raise the entire door jamb and threshold.