Description

If there is no alternative for cables penetrating an exterior wall, how do you ensure the penetration is airtight and weatherproof against wind and water?

The relevant Building Code performance requirement (E2.3.2) is clear about cables penetrating an exterior wall: ‘Roofs and exterior walls must prevent the penetration of water that could cause undue dampness, damage to building elements, or both.’

Scope

This article includes:

• Detail them
• Minimise penetrations
• Install cables in a conduit
• Where cables are not in a conduit
• Penetrations for light fittings, switches and power sockets
• Cable penetrations through existing walls