I just installed a new prehung door, but my wife noticed a substantial gap at the bottom—about 7/8" between the door and the floor. Is this a common issue with prehung doors? Is it okay to trim the jamb to reduce the gap, or could that cause other issues since we already have flooring installed?
2 Answers
It's actually quite normal for builder-grade prehung doors to have a gap like that. You can trim the jamb a bit to lower the door if you want, just make sure the gap stays even along the swing of the door. Also, check if your floor is level before doing any cutting. Definitely a common scenario!
You might also consider adding a door sweep. It'll cover the gap and help with drafts if that's a concern. Just a simple fix that can make a big difference!

Yeah, I've dealt with a similar gap before. Just make sure your cuts are even so the door swings properly!