Wall Wrap Selection Guide
Wall Wrap Selection Guide
Wall wraps are classified according to its reflective properties and/or vapour permeability. Reflective properties determine the thermal contribution of the product and vapour permeability determines the ability of the wrap to control the flow of water vapour which influences condensation control.
Selection of the most appropriate wall wrap is dependent upon the climate region, type of construction and amount of wall insulation being used. As thermal insulation properties can be effectively managed with the addition of bulk insulation, the key variable that wall wrap should control is condensation – this involves the control of water vapour from either outside (in humid climates) or inside (in cooler climates where the interior is heated).
Depending upon the type of building construction, insulation levels and climate zone in which you are building, the selection of the right wall wrap is critical to ensure the energy efficiency of your home and long term health of your family. As a general guide the following climate map can be used to select the most appropriate wall wrap, but as this is a complicated issue, further more detailed information can be contacted by contacting CSR Bradford to access our extensive condensation modelling library for most climate regions around the country.
Hot humid summer - Recommended product range: Non-permeable wall wrap – lapping and taping of joins and penetrations is required in this region to achieve a vapour seal for condensation control.
Warm humid summer - Recommended product range: Non-permeable wall wrap – lapping and taping of joins and penetrations is recommended in this region to achieve a vapour seal for condensation control.
Hot and dry summer with mild winter - Recommended product range: Non-permeable wall wrap is recommended for use with most levels of insulation
Warm summer with cold winter - Recommended product range: Non-permeable wall wrap is recommended for use with lower levels of wall insulation (less than R2.0 wall batts) and vapour permeable wall wrap is recommended for applications with higher levels of wall insulation (R2.5 and R2.7)
Mild summer with very cold winter - Recommended product range: Vapour permeable wall wrap is recommended for all levels of insulation. Lapping and taping of joins and penetrations is recommended in this region to improve energy efficiency.
CSR Bradford offer a range of technical services including condensation modelling for project or climate specific applications by different construction types – advice should always be sought regarding high humidity environments such as indoor swimming pools or spas. Please note that these are generic product recommendations based upon typical building usage and normal construction practices in accordance with the BCA and Australian Standards when compared against the Australian Bureau of Meteorology temperature and humidity data for an average year. If you are in doubt, please contact CSR Bradford.