Gap Under Interior Door Threshold

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 interior door threshold.

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. But a gap of 1 5 inches seems excessive. The installer told me the shoe would cover the gap. I ve just paid a series of professionals to measure order install and paint a pre hung exterior door.

Mike gn builders please cite the location of this ada requirement. My contractor just hung our fancy dancy un painted solid wood door slabs in my 100 year old house with solid hardwood floors throughout. There is a 1 5 inch gap between the threshold and the bottom of the wooden door.