On Jan 29, 8:48*pm, wrote:
Any ideas on filling the gap between door and threshold? I replaced
storm door but threshold is not deep enough to meet bottom of new
door. I tried replacing threshold with a deeper one, but old one is
too tough to get out. I want to close the gap on interior side of the
door with some sort of sweep or weatherstrip extrusion. Gap is almost
1". Anybody know where I can buy something to help fix this?

If the gap is 1", I think that you need a new door.