Overview
Certain thresholds (adjustable Part M-compliant types) have a blade that can be raised or lowered to improve sealing. A screwdriver and 10 minutes.
Symptoms
- Draught or light under the door.
- Threshold blade sits too low or too high.
Common causes
- Blade needs setting.
When to call a professional
- Non-adjustable threshold - different fix.
Prevention
- Include in annual service.