How to Fix a Drafty Old Front Door Gap at the Bottom
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You don't need a new door to stop a draft at the bottom. Start by checking why the gap is there, then pick the fix.
1. Check the door first
If the door has sagged, the gap is often uneven: tight at one corner, open at the other. Do the 1-minute door alignment check. A long screw through the top hinge into the framing often pulls a sagging door back up.
2. Pick the fix
- Best seal: interlocking bronze threshold. A bronze threshold with a hook that catches a J-hook strip on the door bottom. It blocks wind, rain and light. Standard kit · low-profile kit · water-return kit for exposed doors. Install guide.
- Simpler: bronze saddle plus a sweep. A low bronze saddle threshold caps a worn sill; pair it with a door sweep to seal.
- Hidden: automatic door bottom. A seal mortised into the door bottom drops when the door closes. See the automatic door bottom.
3. Seal the sides too
Drafts at the bottom often come with drafts up the sides. Spring bronze or interlocking L-strip seals the jambs and head.
Common questions
How do I fix a draft at the bottom of an old door?
Check the door's alignment first, then add an interlocking bronze threshold with a J-hook strip, a bronze saddle with a sweep, or an automatic door bottom.
What is the best seal for the bottom of an old door?
An interlocking bronze threshold with a hook that catches a J-hook strip on the door bottom. It blocks wind, rain and light.
Want it done for you?
Classic Door installs weatherstripping and bronze thresholds on historic doors across New England. Anywhere else, send photos of the full opening, the door edge and the sill and we will tell you what you have and what to order. Not sure you picked the right part? Write "verify my order" in the order notes and we will check it before it ships.