Thermal bypass–air movement that causes a significant increase in the heat loss

The Governments legally binding objective of achieving an 80% reduction in national CO2 emissions and the drive for zero carbon homes and buildings is focusing attention upon building design and procurement. In developing the design for a residential development concerns relating to the subject of “thermal bypass” have had a significant influence upon the project and lead to the development of new quality assurance systems. It should be recognized that the term thermal bypass is being applied to largely unfamiliar, and often unregulated, heat transfer. In this article has treated some principles to eliminate air gaps within and either side of the insulation layer, to preserve airtight construction, and to protect the insulation layer against wind induced air movement.