Overview
Standard composite door thresholds are aluminium extrusions with replaceable rubber or brush seals. Full threshold replacement means unscrewing and lifting out; seal replacement is a push-fit.
Symptoms
- Worn threshold surface.
- Water ingress.
- Damaged threshold blade.
Common causes
- Foot traffic.
- Weather.
- Impact.
When to call a professional
- Full threshold replacement.
Prevention
- Clean monthly.