Concern & action: Retention of air flow - door undercuts

Door undercuts of at least 10mm are needed to keep air floor between rooms with the door closed.

Suggested actions

Before Implementation

Check existing doors have at least a 10mm high undercut and specify any new doors to finish 10mm above floor finish (10mm undercut) to allow for air flow between rooms even with door closed.

During implementation

Check all doors finish 10mm above floor finish (10mm undercut).

After implementation

Explain to users the need for this undercut to retain appropriate air movement between rooms so that it is not blocked when draughts are felt under internal doors.