Types Of Door Sweeps
| Type | Best For | Notes |
|---|---|---|
| Rubber or vinyl fin | Smooth, even thresholds | Good seal, inexpensive, wears over time |
| Brush or bristle | Uneven floors and thresholds | Flexible, but small insects can push through thin bristles |
| Aluminum with insert | High-traffic exterior doors | Durable metal housing, replaceable insert |
| U-shaped door shoe | Doors that need a full bottom wrap | Wraps the bottom of the door for a tighter seal |
| Automatic sweep | Doors over carpet or rugs | Drops down when the door closes, lifts when it opens |
For pest control, a sturdy sweep with a metal mounting strip holds up best. Mice can chew through soft rubber and thin vinyl, especially at the corners. Garage doors are a separate case with their own bottom seal. Our post on mice getting past garage door seals covers that one.
Most pest problems start with a gap, and the space under an exterior door is one of the easiest gaps to overlook. If mice, crickets, spiders or ants keep showing up near the doors of your Elizabeth home, a worn or missing door sweep may be the reason. Door sweeps are inexpensive and simple, but they only work if they fit well. Below, we'll cover what door sweeps do, which pests they stop, how to choose the right type and how to check and maintain them. For a full check of all the gaps around your home, our home pest-proofing service is a good place to start.
What A Door Sweep Does
A door sweep is a strip of rubber, vinyl, silicone or bristle mounted along the bottom edge of a door. When the door closes, the sweep presses against the threshold and fills the gap between the door and the floor. That keeps out drafts, rain and pests at the same time.
Doors need a little clearance to swing freely, so there's almost always a gap at the bottom. Over time, thresholds wear down, doors settle and sweeps crack, tear or flatten. A gap that started small can grow without anyone noticing. Doors that get heavy use, like the one to the backyard or the garage, tend to wear out their sweeps first.
Which Pests Use The Gap Under Your Door
- Mice. They can squeeze through openings roughly the width of a pencil, so a worn sweep is plenty.
- Crickets and camel crickets. Common at basement, garage and patio doors.
- Spiders. They wander in along the floor, especially in late summer and fall.
- Ants. Trails often follow the threshold straight into the kitchen or entryway.
- Earwigs, millipedes and sowbugs. Moisture-loving pests that move in from damp mulch and soil near doors.
- Cockroaches. Some species travel indoors from outside or from shared hallways in multi-unit buildings.
How To Check Your Door Sweeps
- Look for light. At dusk, turn off the indoor lights and look at the bottom of each closed exterior door. Light means a gap.
- Try the paper test. Close the door on a sheet of paper. If it slides out easily, the seal is loose.
- Inspect the sweep. Look for cracks, tears, flattened fins and chewed corners.
- Check the corners. The spots where the sweep meets the door jamb are where gaps hide most.
- Check the threshold. Many thresholds can be raised with adjustment screws to meet the sweep.
How To Replace A Door Sweep
Replacing a screw-on sweep is a manageable job for most homeowners. Measure the width of the door and buy a sweep that's the same size or slightly longer, since many can be trimmed with a hacksaw or utility knife. Remove the old sweep and clean the bottom of the door. Close the door and hold the new sweep against the inside face so the fin or bristles just touch the threshold. Mark the screw holes, then fasten it so the door still opens and closes without dragging. If you're installing a door shoe that slides onto the bottom of the door, you may need to take the door off its hinges first. Once it's on, check for light again at dusk. Doors with a large or uneven gap may need the threshold adjusted or replaced before any sweep will seal well.
Getting The Most From A Door Sweep
- Match the sweep to the door. Measure the door width and the gap height before buying.
- Seal the sides and top. Replace worn weatherstripping around the frame so pests don't just go around the sweep.
- Don't forget other doors. Basement, garage-to-house, patio and storm doors all need attention.
- Clear the doorway. Keep mulch, leaves and stored items away from the outside of doors.
- Recheck each season. Doors shift with temperature and humidity.
When To Call A Professional
A good door sweep closes one gap, but pests use many. If you've replaced your sweeps and still see mice, insects or spiders inside, they're likely getting in somewhere else, such as utility lines, vents, foundation cracks or the garage. Our NJ DEP-licensed technicians inspect the whole house, find the entry points and recommend a plan, including targeted treatment where it's needed and sealing gaps with pest-resistant materials. We use Integrated Pest Management and EPA-registered, eco-safe products, and our work is backed by the EcoGuard Guarantee.
A door sweep is one of the cheapest and simplest pest-proofing steps you can take. Check yours this season and keep the doors of your Elizabeth home closed to uninvited guests.