A well-insulated home will provide year-round comfort, and cost less to heat and cool. Insulation also helps to reduce noise levels and condensation. Not only is a well-insulated house more comfortable, it can be cheaper to heat, have less mould and mildew, and be less conducive to allergy-aggravating dust mites. New homes, if designed, insulated and ventilated well, can have little to no heating or cooling requirements in many parts of New Zealand. Hour-by-hour computer modelling can be used to optimise the design and determine any additional costs.
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This guide assesses the thermal performance that can be expected for given levels of insulation and common construction options. All text and graphs have been reviewed and updated to take account of the current levels of achievable insulation for walls, roofs and floors.
The guide retains the easy-to-read graphs and tables to determine the as-built construction R-values for given levels of insulation and common construction options. This 5th edition includes new information and modelling for:.
We have provided you with a link to this more recent version for your information only. NZS Print Save Email. Resource detail. Cited By This resource is cited by 3 documents show Citations. Description This guide assesses the thermal performance that can be expected for given levels of insulation and common construction options.
This 5th edition includes new information and modelling for: windows and recessed light fittings steel-framed walls with different cladding types suspended concrete floors, concrete slab-on-ground floors, basement walls and waffle pods. For assistance with locating previous versions, please contact the information provider.
This resource is cited by:. BRANZ House Insulation Guide, 5th Edition Description This guide assesses the thermal performance that can be expected for given levels of insulation and common construction options. This resource does not cite any other resources. Close Table of Contents.
Insulating your home
Designing the building and the spaces within it to benefit from natural light, ventilation and even temperatures. The minimum levels of insulation required for Building Code compliance can be determined using any of three methods, depending on factors such as construction type and glazing area. Specifying better than minimum is strongly recommended. Calculation method The calculation method uses heat loss calculations to determine the proposed building envelope R-value requirements and compares the results with the heat loss HL of a reference building. Its advantage over the schedule method is that it allows a building with different building elements to be assessed as a whole, with adjustments being made between elements. For example, a wall R-value may be reduced if the roof or floor R-value is increased to compensate or if window R-values are increased. R-values are calculated by comparing the energy use of the proposed building with a reference building by means of a computer modelling program such as BRANZ ALF.