Gap Under Interior Door Threshold

The installer told me the shoe would cover the gap.

Gap under interior door threshold.

But a gap of 1 5 inches seems excessive. I ve just paid a series of professionals to measure order install and paint a pre hung exterior door. I have searched quite a bit and can not find anything within the ada guidelines that specify the height of the door gap below the door gn said and sills are limited to 1 2 in height to comply with ada aka thresholds by the ibc. There is a 1 5 inch gap between the threshold and the bottom of the wooden 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. 37 in x 4 625 in wood door threshold install with screws item 130223 model 45837oaksl45837oaksl. There is an approximately 1 5 gap at the bottom of the doors.