How to Replace an Exterior Door Sweep

Stop drafts, insects and wind-driven rain by selecting and adjusting the right bottom seal.

What to know

Identify whether the sweep slides into grooves, wraps around the door or screws to one face.

What to check

Measure width, thickness and the gap over the threshold.

How to approach it

Remove the old sweep and inspect the door bottom for rot.

Common warning signs

Cut the replacement to length and set it for light, even contact.

When to stop

Check the bottom corners for daylight; corner pads or threshold adjustment may also be needed.

Common mistakes

• Replacing parts before identifying the cause
• Skipping measurements or manufacturer instructions
• Using fasteners or materials not rated for the application
• Closing the repair before checking for hidden damage

This guide provides general homeowner information. Local code, permits, licensing and site conditions may affect the correct approach.