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Retrofitting insulation to external walls

Guidance to help understand Building Code requirements for retrofitting insulation in external walls.

Heat pump water heaters

Heat pump water heaters, how they work and whether building consents are needed.

Weathertightness for medium-rise dwellings

Structural design and cladding design must be well co-ordinated to ensure medium-rise dwellings are weathertight.

Head flashings in E2/AS1

The critical measurements needed for weathertight performance of the joint between flashing and window flange.

Lighter cladding and your TC3 repair or rebuild

Advice on common lighter cladding types for homeowners repairing or rebuilding in TC3 areas.

Concrete tile roofs: Amendment 5 to E2/AS1

Guidance on wind speed and pressure requirements with regards to concrete tile roof underlays and underlay support.

This information is published by the Ministry of Business, Innovation and Employment’s Chief Executive. It is a general guide only and, if used, does not relieve any person of the obligation to consider any matter to which the information relates according to the circumstances of the particular case. Expert advice may be required in specific circumstances. Where this information relates to assisting people: