Changes to Building Code Clauses E2, F4, F6 and G13/G14

Several unrelated changes to Building Code Clauses came into effect on 21 June.

Clause E2 External Moisture

The changes make weather-tightness requirements clearer. It is now clear that building elements close to the ground, and not only those in contact with the ground, must not absorb water likely to cause damage or dampness. Wall cavities now need to be constructed to prevent fungal growth as well as condensation and degradation. The clause now requires designers to also consider material variability and the way in which construction occurs so that weathertightness problems are prevented.

Clause F4 Safety from Falling

The clause now bans safety barriers that can be readily used as seats in public places.

Clause F6, formerly Lighting for Emergency, now Visibility in Escape Routes

The clause has been completely rewritten to make New Zealand building users safer in emergencies. It strengthens and clarifies the requirements for occupant safety in emergencies in line with inter-national best practice. The clause now allows the use of the latest way-finding systems - photo-luminescent strips, directional markings and light emitting diode strips - as well as normal emergency lights. Way-finding systems have seen major technological advances in recent years and are used increasingly overseas.

For example, New York City now requires the use of mixed emergency lighting and way-finding systems because of the September 11 terrorist attacks.

Under the new clause, there must be enough visibility in the building when the main lights fail, for evacuation and to avoid panic amongst building users. The amendments mean building elements (stairs, doors, etc.) will need to be visible from 10 metres in an emergency.

Clause G13 Foul Water and Clause G14 Industrial Liquid Waste

Several minor technical updates have been made to the clauses, clarifying the performance requirements for on-site disposal of foul water (septic tank systems) and the storage, treatment and disposal of industrial liquid waste.

The details of the changes and the updated clauses are available on the Department's website.