Position the gasket so it sits against the door tightly on the inside when the door is closed.
Gap under wooden front door.
Door sweeps reinforce the seal between the bottom of the door and the door jamb meaning you get extra protection from dirt bugs moisture and wind.
The odds are you ll see a larger gap at the top of the door on the top edge that s above the handle or door knob.
A gap between the bottom of the front door and the threshold is easily fixed with a door sweep.
Make marks through the pre drilled attachment holes onto the door proper.
The standard i use is 1 2 over finish floors 3 4 is acceptable.
That is a lot of room for unlevel you have there.
The door is probably touching the side jamb at the top of the door leaving no gap at all.
Shim it and nail it and hang the trim.
Place the sweep at the bottom of the door and align the sweep edge so that it blocks the door gap.
Remove the adhesive backing and stick.
Pilot hole the marks.
If you have a large gap at the bottom of your door that may be helping the door to stay plumb.
Reset the door so that it is level and plumb.
I have never seen a door set with that big of a gap unless it was to get past floors that were not level.
New upgrade huge gap door draft stopper 3 2 5 w widened door sweep seal gap up to 1 4 5 for interior exterior doors keeping draft noise dust and unwanted animals out 3 2 5 w x 39 l white 4 6 out of 5 stars 1 076.
Install a foam weatherstripping gasket around the door frame.