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What are the building requirements for double glazing?
The new energy efficiency building requirements of 3rd Edition of Clause H1 of the New Zealand Building Code were introduced on the 31st October 2007 making double glazing necessary in most new houses to met the new glazing R-valve of 0.26.
It still may be possible to use single glazing, by using a heat loss calculation as per:
(Calculation Method - NZS4218:2004) that allows the insulation in one part of a house to be traded against the insulation in another part of the house. You should discuss this with your designer as they will be required to provide calculations demonstrating compliance with NZS4218:2004 with any building consent application.
Note, the new requirements 3rd Edition of Clause H1 only apply to Building Consent Applications applied for on or after 31st October 2007. .
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energy efficiency building, building, thermal insulation, requirements, double glazing, window, residential, consent, permit
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