Modelling daylight for preserving identity : simulation of daylight levels for successful intervention in historic buildings

Historical listed buildings have their own unique cultural identity, which is one of the criteria used by decision mechanisms for their statutory protection. The identity of many of these buildings is often related to their tangible features/components, such as period characteristics (geometry, size, colour, form, and shape), materials and construction. Daylight is one of the in/tangible elements that have contributed to the distinctiveness of many historical buildings, yet when constructing preservation schemes of historical buildings, daylight is rarely introduced or considered as one of the components that shape the character of buildings. One of the reasons is the limited number of credible simulation studies that identify such interrelationships. As many of these buildings were originally designed to accommodate different activities to today's requirements, maintaining the quality of daylight that originally contributed to their visual identity can be a very challenging task, especially if the building is to be adapted to accommodate a different activity. In this paper we will discuss the conflict between maintaining the original visual identity of historical buildings and meeting the visual requirements of restored buildings. The paper discusses the visual performance of a traditional bathhouse (Hammam) in the city of Bursa in Turkey. The change in the visual performance of the selected case study will be discussed in terms of daylight conditions. The paper explores the possibility of maintaining the original daylight conditions of renovated historical buildings while meeting the visual requirements of the new use.

Why do women like working in building conservation?

There is a perception that Building Conservation as a career is different from the mainstream, and it appears to be more attractive to women - at whatever level - than many other careers in the construction industry. Whilst recruitment and publicity can be targeted, the culture within the construction industry can be a barrier to entry for anyone that is "different." As Clara Greed (1999) discovered in her research "the traits, beliefs and lifestyle peculiar to the construction tribe" can inhibit the entry to the industry of a number of groups outside the traditional pool. The growth of women in the workforce generally (some 50% according to Turrell et al, 2000) is nowhere near being matched within the construction industry as a whole - the Construction Industry Board placed it at around 8.6% in 2000 across all positions. The various UK industry and professional bodies are actively supporting the need to attract women, with the CITB saying they want a 10% year on year increase in participation, the RICS have their own Raising the Ratio working group and the RIBA have carried out research to find out "why women leave architecture."

Of course the whole of the industry is not unfriendly to women - there are a number of us who have been in the industry for many years and recognise it as a fulfilling and exciting career - a number of women work as surveyors working on historic buildings. The initiatives that are working towards change might have something to learn from Building Conservation - while the shortage of skills is just as severe in work with historc buildings - this area of work holds an attraction to women, not found elsewhere. This paper draws on research carried out to explore some of the reasons for this.

The study involved sending a questionnaire to twenty women already working in Building Conservation (the response rate was over 100%) and arranging for questionnaires to be completed by school students (male and female) choosing university courses in one school (60 questionnaires sent out, with 35 returned at a response rate of 58%)

The research showed that the majority women working in Building Conservation did not agree that men heavily dominated their sector of the industry, whereas within other areas of the construction industry men make up approximately 90% of the workforce. The research found that women often perceived the Construction Industry to be 'cut-throat', 'egotistical' and 'financially beneficial', whereas they thought Building Conservation required 'patience', 'care' and 'attention to detail'.

Of the women who took part in the research, 87% were working in Building Conservation because of a personal interest , and the main aspect of that attarction was history and architecture. The study examined attitudes of school students choosing careers and the research shows that when male and female sixth form students were told what Building Conservation was about and what it involved, 43% would consider a career in it and 49% would be interested in talking part in a work experience placement working with historic buildings. The shortage of people working in Building Conservation could be reduced if more people were educated about the profession in a way relevant to their skills and interests. In order to assist this action, the study examined ways to introduce Building Conservation careers to school girls and drew on the initiatives that the university is doing to promote careers in the built environment to schoolgirls.

Islamic gardens between restoration and replacement

Architecture is considered the visible reflection of the local character of contexts. Therefore, conserving the architectural heritage is becoming one of the critical concepts in life, especially with the rapid change and transformation characterizing the globalization era. As a vital part of the broader context of the architecture; landscape architecture is also considered an effective tool of societies’ self representation. Gardens reflect a very special relationship between the man and nature and represent the history of the state of societies in which they were developed. Islamic gardens are one of the historic gardens having a special charm of their own. Gardens associated with Islamic period over several hundred years, are designed according to certain ideological principles employing certain physical elements shown in the west as well as the east. They represent an ideological continuity which is unique in its spread and development over a wide range of geographical and cultural regions. The Islamic architectural heritage is usually well protected. In the restoration process, the historic buildings are returned back to their original conditions. However, with the changing nature of gardens; it is sometimes hard to track back their original state. In that case, in order to conserve those gardens; it is important to study the design principles upon which the physical elements were chosen. In this paper, the principles of design of the original Islamic gardens will be reviewed through a quantitative analysis of a questionnaire. These principles will be compared to the current situation of the garden of Humayun’s Tomb built in the Mughal era in India, after its conservation in 2003.

Old buildings, new landscape : Redeveloping historic neighbourhoods - A case study of Xin Tian Di, Shanghai, China

This paper explores the use of tradition by the redevelopment project ofXin Tian Di (New Heaven and Earth) in Shanghai. The paper also identifies the implications of this urban redevelopment project to historic quarters in Chinese cities. An enormous commercial success and new Shanghai icon, Xin Tian Di project has transformed a former residential neighbourhood into a high end entertainment precinct. While the redevelopment ofXin Tian Di has retained the architectural features of the place, the use and interpretation of tradition by the project is problematic. The project shows a tendency where the established idea of tradition is destabilised and challenged. It also highlights issues of cultural authenticity in the redevelopment of historic quarters.

Conservation of urban historic districts in China : present models of integration and utilization of historic resources and challenges for authenticity

Chinese urban historic districts retain abundant urban traditional features, local characteristics and historic architecture. They not only gather and display urban cultural heritage but extend and develop urban historic culture and social traditions. In 1964 the “Venice Charter” expanded the concept and scope of historical and cultural heritage conservation from individual building heritage, historical sites comprising heritage buildings and historical environments to whole historic districts. At the same time, authenticity was adopted as a principle of heritage conservation. In 1994 the Nara Document on Authenticity confirmed that authenticity is of great importance to the conservation of cultural heritage. In 2003, “The Hoi An Declaration on Conservation of Historic Districts of Asia” reinforced the significance, integrity and authenticity of historic district conservation. In China, with the accelerated urbanization process and improved living conditions of urban residents, the unique values and historic and cultural heritage of historic districts is being destroyed. Considerable historic and cultural heritage has been reconstructed, leading to the loss of authenticity of these historic districts. This paper provides an overview of the Chinese situation. It highlights the problems and demonstrates a clear need to protect the authenticity of these historic districts. Authenticty is evaluated against various Chinese conservation of historic districts having regard to international experience and methods. As a result, it will be demonstrated that conservation modes of authenticity of urban historic districts in China and historic resources should be employed to ensure: 1) the restoration and conservation of historic architecture; 2) the preservation and renovation of old spaces and structures; 3) the integration and coordination of historic and new buildings; and the 4) the continuation and succession of historic culture and local tradition.

A tale of two Victorian historic coastal towns : dilemmas of planning and conservation in Queenscliff and Sorrento

Change has engulfed the coastal fringe of Australia. In balancing the built and natural environment, community needs, cultural significance and economic sustainability, planners aim to improve quality of life and create vibrant communities. Yet managing place change, particularly in coastal areas, is fraught with tensions. Most planning discussions about the rapidity of change, the impact of the Sea Change process and increased development have focused upon the extensiveness of residential expansion and the housing styles that challenge the essence of the character of these coastal towns. Character and sense of place qualities are the very reasons that sea changers desire to engage with and reside within these communities. One aspect missing from this discussion and analysis is the impact that large-scale transformations of iconic buildings are having upon these places. This paper examines the consequences that major commercial development projects have upon the communities of Sorrento and Queenscliff. It considers changes (proposed or realised) to four landmark historic hotels: The Koonya and Continental in Sorrento; and the Ozone and Vue Grand in Queenscliff. This paper focuses on issues of planning, social engagement and community debate.

Quantifying changes in building footprint in the historic coastal town of Queenscliff

The sea change phenomenon has attracted new residents to Australian coastal towns and brought with it expectations of residential housing formed in metropolitan settings. Consequently, the traditional ‘identifying’ neighbourhood character of these towns is changing. Much larger houses are now being built and site coverage has increased. To date, changes in character have been measured using data based on the subjective judgement of residents through surveys and interviews. More objective information would be beneficial in understanding change. This paper describes a methodology that has been developed to quantify the change in the building footprint in the historic coastal town of Queenscliff in Victoria. Using selected aerial photographs, the building footprint of the town's residential buildings has been estimated at four intervals from 1957 until 2006. This footprint has been compared to the block size at each interval so that changes in house-to-block ratio may be compared. Over 20% of the residential homes were assessed. Building footprint has risen from 30% to over 38% in the documented 50 years. The method developed here is a low-cost method of tracking footprint change over an extended period and informing local planners and residents of when and where the changes have occurred.

Using national input-output data for embodied energy analysis of individual residential buildings

Embodied energy (EE) analysis has become an important area of energy research, in attempting to trace the direct and indirect energy requirements of products and services throughout their supply chain. Typically, input-output (I-O) models have been used to calculate EE because they are considered to be comprehensive in their analysis. However, a major deficiency of using I-O models is that they have inherent errors and therefore cannot be reliably applied to individual cases. Thus, there is a need for the ability to disaggregate an I-O model into its most important 'energy paths', for the purpose of integrating case-specific data. This paper presents a new hybrid method for conducting EE analyses for individual buildings, which retains the completeness of the I-O model. This new method is demonstrated by application to an Australian residential building. Only 52% of the energy paths derived from the I-O model were substituted using case-specific data. This indicates that previous system boundaries for EE studies of individual residential buildings are less than optimal. It is envisaged that the proposed method will provide construction professionals with more accurate and reliable data for conducting life cycle energy analysis of buildings. Furthermore, by analysing the unmodified energy paths, further data collection can be prioritized effectively.

Net Energy Analysis of Double Glazing for Residential Buildings in Temperate Climates

Energy used in buildings is a major contributor to Australia’s energy consumption and associated environmental impacts. The advent of complex glazing systems such as double glazing, particularly in northern America and Europe, has partially closed a weak thermal link in the building envelope. In milder climates, however, building envelope features may not be as effective in life cycle energy terms, i.e. including the embodied energy of their manufacture. A net energy analysis compares the savings in operational energy to the additional requirements for embodied energy, in terms of the energy payback period and energy return on investment. The effectiveness of double glazing is determined for an Australian residential building. A wide range of building operation regimes was simulated. These results support the principle of installing double glazing in residential buildings in Melbourne, Australia, at least in terms of net primary energy savings.

An analysis of embodied energy of office buildings by height

Aims to compare the energy embodied in office buildings varying in height from a few storeys to over 50 storeys. The energy embodied in substructure, superstructure and finishes elements was investigated for five Melbourne office buildings of the following heights: 3, 7, 15, 42 and 52 storeys. The two high-rise buildings have approximately 60 percent more energy embodied per unit gross floor area (GFA) in their materials than the low-rise buildings. While building height was found to dictate the amount of energy embodied in the “structure group” elements (upper floors, columns, internal walls, external walls and staircases), other elements such as substructure, roof, windows and finishes seemed uninfluenced.