The gap under the door
Best door sweeps
The best door sweep is the one that meets the threshold you measured, not the one with the strongest ad. Mice use a pencil-width gap. Norway rats use about a half-inch. If you can see daylight under an alley door or a garage door, that strip is the infestation. Buy the sweep for that gap, and buy a garage threshold if the slab is uneven.
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Best for entry doors: Door sweep / garage threshold seal. Measure the width of the door and the height of the gap. A sweep that stops short of the strike side leaves a mouse slot. Replace it when the rubber flattens.
Compare the picks
| Role | Tool | Best for | Type |
|---|---|---|---|
| Best for entry doors | Door sweep / garage threshold seal | A visible gap at the sill | Hardware |
| Best for garage doors | Garage door threshold seal | Daylight under a garage door | Hardware |
| Best for the side gaps | Door and window weatherstripping | Stops and jambs | Hardware |
Which one to buy
Hardware
Door sweep / garage threshold seal
Best for entry doors — Measure the width of the door and the height of the gap. A sweep that stops short of the strike side leaves a mouse slot. Replace it when the rubber flattens.
Hardware
Garage door threshold seal
Best for garage doors — A threshold plus a bottom seal. Garage doors are how rats enter a kitchen through the house. A cute sweep on the front door does not fix the alley.
Hardware
Door and window weatherstripping
Best for the side gaps — The sill can be tight and the latch side still open. Buy weatherstripping in the same trip if a credit card slides past the stop.
Measure before you order
Close the door on a piece of paper. If it slides out freely, the seal is not a seal. Look at the corners, not only the middle. Concrete that has heaved under a garage door needs a threshold, not a longer brush that still floats in the middle. Metal doors and wood doors do not take the same screw pattern. Read the package for the door you have.
Common questions
What is the best door sweep for mice?
One that leaves no gap a pencil fits through, across the whole sill, including the corners. The brand matters less than the fit.
Do door sweeps work for rats?
Yes, if the remaining gap is under a half-inch and the sweep is not a soft flap a rat can push. Look at the garage, not only the front door.
Is a sweep enough by itself?
It closes one commute. Pipe gaps, dryer vents, and the garage threshold are the usual second and third holes. Trap while you seal.