Heritage Regulation 2012

The following systems or components, if present, must be maintained and repaired (including by being cleaned and secured) to the standard necessary to ensure a reasonable level of protection for the building, work or relic, and its curtilage or site, against damage or deterioration due to weather—

surface and sub-surface drainage systems,

roof drainage systems, including gutters, rainwater heads, down-pipes and stormwater drainage systems,

water storages, dams, ponds, retention basins, watercourses, batters, levee banks, sea walls and other flood and erosion mitigation measures,

roofs, walls, doors and windows (including the glass components of doors and windows) and other components intended to exclude sun, rain, wind, hail, snow or other weather elements, including their security against the effects of high winds,

systems or components which might be at risk of damage or dislodgment by high winds, including damage by falling trees and branches, tidal inundation or wave action,

systems and components such as damp proof courses, flashings, ventilation systems and other measures intended to prevent the ingress of water or dampness or to reduce its effects,

lightning conductors,

any other system or component designed to protect the building, work or relic or its curtilage or site against damage or deterioration due to weather.

Doors and windows of a building may, as an alternative to being repaired, be boarded up, but only—

if the building is unoccupied, or

as a short term measure pending repair.

If an opening to a building is designed or intended to have a door, window or other closure in place and does not have the door, window or other closure in place, the opening must be boarded up.