Exterior Doors & Hardware

Door Sweep - Bottom Door Seal Guide for Homeowners

1 min read

A door sweep is a strip attached to the bottom of a door that helps block drafts, dust, insects, and light at the gap above the threshold.

Door Sweep diagram — labeled parts, dimensions, and installation context

What It Is

A door sweep is part of the weather-sealing system for a door. It closes the bottom gap where outside air, water splash, or pests can get through more easily.

Sweeps wear out from friction, sunlight, and repeated use, so they are one of the more common exterior door maintenance items.

Where It Is Used

Door sweeps are used on exterior doors, garage entry doors, some utility-room doors, and occasionally interior doors where light or sound control matters.

How to Identify One

It is mounted along the bottom edge of the door and may use rubber, vinyl, silicone, brush material, or an integrated aluminum carrier.

Replacement

Replacement is needed when the sweep tears, drags badly, leaves a visible gap, or no longer seals against the threshold. A poor seal may also point to door sag or threshold misalignment.

Frequently Asked Questions

Door Sweep — FAQ

What does a door sweep do?
It seals the bottom of the door to reduce drafts, dust, insects, and some water intrusion at the threshold area.
Why is light showing under my door?
The sweep may be worn, missing, installed too high, or the door and threshold may be out of alignment.
Can I replace a door sweep myself?
Usually yes. Many sweeps are simple screw-on or slide-in parts, though fit and adjustment still matter for a good seal.
Why is my new door sweep scraping the floor?
It may be set too low or the wrong type for the threshold profile. Door sag can also make one side drag while the other side gaps.

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