If the significant numbers of dwellings with solid masonry walls (SMWs) are to be insulated, there will have to be a paradigm shift in the way that moisture risk is assessed. Methods must be developed to clearly demonstrate that insulation solutions are effective, robust and resilient to moisture even when considering the vagaries of our future climate and the way that people choose to live in their homes. This research will result in new methods and metrics, backed by rigorous scientific evidence, that enable moisture risk assessment of SMWs to be carried out routinely, new insulation materials to be developed and more homes to be insulated. Insulating the UKs existing housing stock will be an essential step in achieving greenhouse gas reduction targets and alleviating fuel poverty. The highest levels of heat loss occur in the c30% (8 million) homes that have SMWs. Insulating these walls offers significant potential for fuel savings but may cause moisture problems. Water accumulates within SMWs when it is raining outside or humid inside and diminishes with drier conditions. This water can pass from one face of the wall to the other as there is no cavity to act as a capillary break. Applying insulation to either the inside or outside face of the wall changes the temperature of the masonry, the rate of wetting and drying at each face and the locations where water vapour might condense and accumulate. This moisture can lead to mould growth, interstitial condensation and freeze thaw damage. These problems can cause severe damage, are expensive to repair and can affect the health of occupants. Current guidance in the UK Building Regulations (approved document C) and related standards is not adequate for assessing moisture risk when insulating SMWs. The simplified steady-state vapour diffusion model is not appropriate because dynamic liquid moisture conduction is the dominant moisture transport mechanism when SMWs are exposed to rainfall. There is a distinct lack of guidance on how to use more advanced transient heat and moisture simulation software, what inputs should be used for the boundary conditions and how the results translate into moisture risk. Straightforward design principles, based on many years of practical experience and research, have led to contradictory advice e.g. there is no clear consensus on how permeable the insulation material should be to water vapour. Thus only a small handful of hygrothermal experts might ever attempt a quantitative risk assessment for insulating SMWs and fewer SMWs are being insulated as a result. This research project will address these problems. Firstly, a framework will be developed for using advanced heat and moisture simulation software to carry out moisture risk assessment. This will include guidance on the boundary conditions to be used at the inside of the wall, and outside especially for wind driven rain exposure. It will also identify appropriate criteria to minimise risk from moisture accumulation within the wall, mould growth at the indoor surface and freeze/thaw at the outside surface. A number of insulation materials will be compared to understand which can best reduce the risk of moisture damage when insulating SMWs. Secondly, probabilistic modelling methods will be used to understand how robust different insulation solutions are to moisture damage given that there is considerable uncertainty in boundary conditions and material properties. Thirdly, new approaches to moisture risk assessment will be explored. A 'moisture safety factor' might describe how resilient an insulated SMW is to extreme events such as flooding. It may be possible to develop a completely new laboratory test for assessing insulation solutions. The underlying strength of this research comes from the collection high quality primary data, in the new state-of-the-art Hygrothermal Test Facility, for validating the results from the models.

Addressing climate change through reducing carbon emissions is a crucial international goal. End use energy demand (EUED) reduction is essential for the UK to meet its legally binding 80% carbon reduction target and has significant economic and social benefits: it lowers the operating costs of businesses, increasing their competitiveness, and reduces the fuel bills for home owners, guarding against fuel poverty and improving quality of life. Government, industry and academia recognise the importance of EUED reduction and are responding by developing new policies, products and services. However, there is a shortage of highly trained individuals who will spearhead these initiatives. Recognising this, the Engineering and Physical Science Research Council (EPSRC) has identified EUED in buildings, transport and industry as a priority funding area for the development of a Centre for Doctoral Training (CDT). For the last 4 years, the UCL Energy Institute and the School of Civil and Building Engineering at Loughborough, have run a successful CDT: the London-Loughborough Centre for Doctoral Research in Energy Demand (LoLo). The Centre is seeking funding for a further 8 years to train 60 students. The scope will be expanded beyond buildings to include energy demand in transport and industry directly related to the built environment. The new Centre will build on the existing four year programme: a one year Masters of Research in Energy Demand followed by a three year PhD. Training will be enhanced by an annual colloquium; international summer school; team building away days; seminar series'; creativity, communication and business training; and numerous other activities. Students will undertake placements with partners and in relevant overseas organisations. They will have a firm grounding in core skills and knowledge, but appreciate the multi-disciplinary perspective needed to understand the technical, economic and social factors that shape energy demand. The Centre's research will address new challenges within five themes, grouped around major research programmes: technology and systems, energy epidemiology, urban scale energy demand, building performance and process, and unintended consequences. This linkage ensures students' work gains momentum, is at the forefront of knowledge, has excellent resources, and is supported by a wide group of world class academics. The Centre will again be led by Profs Lowe and Lomas; together they have over 60 years of experience in energy and buildings. They will be supported by Academic Managers and Administrators and over 40 academic supervisors whose expertise spans the full range of disciplines necessary for EUED research: from science and engineering to ergonomics and design, psychology and sociology through to economics and politics. An Advisory Board will help steer the Centre, whilst the wider group of 26 partners, representing policy, industry, academia and NGO interests, will aid students' training by: developing projects, offering mentoring, hosting students in their organisation, giving workshops and seminars, and direct funding. The proposed new Centre represents excellent value for money. The total cost to the EPSRC to train 60 students is less than the current Centre cost to train 40 students. However, the funding per student will rise by 20%, a result of the financial commitment of our partners and host institutions. The Centre aims to have an enduring impact through our graduates and their research. Short term impact will be achieved through students' engagement with industry, policy makers, NGOs and academia through the annual Colloquium, the international summer school, publications, the web-site and other social media, working with partners and through public engagement. In the long term our graduates will help transform the EUED sector through projects they lead, the students and colleagues they will train and the organisations they influence.