Sub-Floor Ventilation

To avoid this situation airbricks must be positioned in the wall such that air can exchange freely between the sub-floor void and the outside. These airbricks are manufactured in terracotta and plastic to approximately the size of a standard brick, and one should be inserted in the wall every 180cm (5ft 11in), on all sides of the property.

New mechanical vents introduce fresh air to the sub-floor and can alternate and extract stale air.