Retrofit versus new-build house using life-cycle assessment

McGrath, Teresa; Nanukuttan, Sreejith; Owens, Kieran; Keig, Peter

doi:10.1680/ensu.11.00026

Cited by 21 publications

(10 citation statements)

References 15 publications

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“…W1 and W4 have a worse performance at this stage due to the higher weighting of brick (W1) and the higher weighting of EPS (W4). The environmental impacts of the energy use of each solution are directly proportional to the corresponding cost of energy used for heating and cooling ( Figure 2) and are the most significant parcel of environmental impacts, which is in accordance with previous LCA studies (McGrath et al, 2012). End-of-life environmental impact costs are negative only for W1 because of avoiding crushed stone in the recycling's crushing operation and the reuse of more of a mixture of brick, masonry mortar and render produced by the demolition of the walls.…”

supporting

confidence: 89%

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Life-cycle impact ‘cradle to cradle’ of building assemblies

Silvestre¹,

Brito²,

Pinheiro³

2014

Proceedings of the Institution of Civil Engineers - Engineering

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2 3This paper proposes an integrated approach for the evaluation of the equivalent cradle-to-cradle life-cycle impact of building assemblies, including the energy, environmental and economic impacts. The application of this approach is exemplified with external walls of buildings. This integrated approach follows European standards: environmental performance is evaluated following a life-cycle assessment methodology; energy performance is gauged by the consumption of energy for heating and cooling; and the economic module is based on the whole-life costing methodology. The use of an environmental impact assessment method that converts the results of impact categories into an economic unit allows the comparison and selection of alternatives through the addition of the energy, environmental and economic life-cycle costs. The main advantage of this approach is the simultaneous comparison of the energy, environmental and economic life-cycle performance of alternatives (that do not have to be functionally equivalent) without the need to change their characteristics to make them comparable. Engineering SustainabilityVolume 167 Issue ES2Life-cycle impact 'cradle to cradle' of building assemblies Silvestre, de Brito and Pinheiro

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supporting

confidence: 89%

“…The reference study period was defined as 50 years (McGrath et al, 2012;Real, 2010). For the wall structure, only masonry solutions were considered (the most common solution in Portugal).…”

Section: Scope Of the Studymentioning

confidence: 99%

Life-cycle impact ‘cradle to cradle’ of building assemblies

Silvestre¹,

Brito²,

Pinheiro³

2014

Proceedings of the Institution of Civil Engineers - Engineering

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“…Retrofit projects tend to be complex due to their intrinsic characteristics, such as (a) a high level of uncertainty (Bozorgi and Jones, 2013;Singh et al, 2014); (b) the construction process normally happens in short time frames (Manuel, 2011); (c) production generally needs to be undertaken in small batches; (d) challenges related to the poor understanding of user needs and to the technologies to be used (Gholami et al, 2013) and (e) such projects tend to have a high level of interference from users, as they may be occupying the building during construction works (Egbu, 1994;Mc Grath et al, 2013). These characteristics tend to lead to higher costs and longer project time frames than anticipated (Ciria, 2004).…”

Section: Retrofit In the Context Of Social Housingmentioning

confidence: 99%

Building information modelling to cut disruption in housing retrofit

Chaves

Tzortzopoulos

Formoso

et al. 2017

Proceedings of the Institution of Civil Engineers - Engineering

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There is a large stock of solid-wall homes in the UK with poor thermal insulation and low energy performance.Although the UK government has supported efforts to improve these buildings, the identification of appropriate technical solutions that effectively improve the existing stock remains challenging. This research investigates how four dimensional building information modelling (4D BIM) could improve the retrofit of social housing, specifically that of 'no-fines' solid-wall homes, through the development of what-if scenarios that enable the analysis of alternative solutions considering costs, energy performance and disruption to users. This paper focuses on the use of 4D building information models to evaluate disruption to end users. The results indicate that the development of such models supports a better understanding of the retrofit process on site. It also supports the definition of production plans with as minimal disruption as possible to users while delivering energy-oriented and cost-effective solutions.

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“…The study demonstrated both the advantages and challenges of gamification which were in agreement with the experiences reported in the literature. Retrofitting of existing buildings offers significant opportunities for reducing global energy consumption and emissions (McGrath et al, 2013). Retrofit projects present many challenges for managers and decision makers, particularly when the end users remain in the building over the period when the works are carried out and are disrupted by the retrofit process.…”

mentioning

confidence: 99%