sustainability
THIS IMAGE System building methods are vital believes the UKTFA RIGHT Crest Nicholson is currently involved in the collaborative AIMC4 project FAR RIGHT DuPont AirGuard AVCL is an advanced, lightweight and easy to answer to improved water resistance and thermal performance in building BELOW DuPont Tyvek Supro and DuPont AirGuard AVCL work together at this high-spec housing development in Scotland
Even the best laid plans may not translate perfectly into a new home. ROGER
HUNT discusses how to ensure what is being delivered in terms of energy performance is exactly the same as the original design.
Closing the performance
GAP
Another acronym was born at Ecobuild this year: DvAB. It stands for Designed v As-Built and is the name of a project being undertaken by the Zero Carbon Hub to examine the energy performance of new homes. Ensuring that what has been designed is the same as what is being delivered is ever more crucial as we strive to improve the energy efficiency and overall performance of buildings. It is increasingly believed that new housing is failing to deliver the anticipated levels of CO2 emissions as well as other key areas of design. The industry and government backed DvAB project will consider the construction process as a whole, from design and planning to testing and verification, gathering evidence of areas where an energy use ‘performance gap’ could occur. The issue is not new and has already been considered in ‘Low and zero carbon homes: understanding the performance challenge’, an enlightening NHBC Foundation publication written by Cutland Consulting. In the foreword, the chief executive of the Zero Carbon Hub, Neil Jefferson points to the fact that “Addressing the CO2 performance gap will be critical to the delivery of the zero carbon homes policy and maintaining confidence in new homes.” Mike Leonard, CEO of the Modern Masonry Alliance welcomes the Zero Carbon Hub project. “Only by taking a representative sample and looking at all stages of the process will we really know if there is a substantive issue and, if so, where we need to direct our resources to solve it.”
showhouseMay 2013 | 41
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