Interior Door Height Off Floor

Interior door height off floor.

Interior door height off floor.

Figure 2 floor relative to entry door. The awi gives no minimum but a maximum of over 3 4 is unacceptable. 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. On the inside of the entry door finished flooring is laid on the concrete or wood sub.

The standard height of the rough opening for a door is the door height plus 2 5 8 inches. The height of common doors is 6 feet 8 inches. The additional room allows for a 3 4 inch top jamb a shim. That is a lot of room for unlevel you have there.

The international building code has established doorknob height between 34 and 48 inches above a finished floor. Installers typically drill the hole centered 36 inches above the floor if not specifically instructed to do so differently exceptions to the rule include doors that provide egress into swimming pools or other water features. To fix the issue the doors need to be removed bottom of the jambs cut and reset the door. Most entry door frames have a piece of lumber below the door and combined with the metal threshold will raise the base of the door off the concrete or wood sub floor by approximately 1 1 4 inches as shown in figure 2.