Cost-effectiveness assessment of insulated exterior walls of residential buildings in cold climate

Wang, Yaowu; Huang, Zhiye; Li, Heng

doi:10.1016/j.ijproman.2006.09.007

Cited by 62 publications

(39 citation statements)

References 11 publications

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“…This fits with previous findings on EWI [22][23][24]. The difference in the amount of energy savings made by different households is of interest.…”

Section: Discussionsupporting

confidence: 91%

“…A number of studies have explored the cost-effectiveness of EWI by measuring the initial cost of installation against subsequent energy savings [22]; its financial and environmental benefits [23,24] have also been considered, as have the effectiveness of different types of materials for EWI [25], and optimal EWI thickness [23], both of which may vary from place to place according to local climate [26]. The Carbon Emissions Reduction Target (CERT) (2008-2012) and Community Energy Saving Programme (CESP) (2009-2012) programmes, which obliged energy suppliers to promote and install energy saving measures in homes across the UK, delivered 60,000 and 75,000 EWI installations during their respective periods of operation [27,28].…”

Section: External Wall Insulation (Ewi)mentioning

confidence: 99%

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External Wall Insulation (EWI): Engaging Social Tenants in Energy Efficiency Retrofitting in the North East of England

2017

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Abstract:The question of how best to tackle the problem of energy inefficient older housing in the UK is considerable, and is further complicated by the question of tenure. Social landlords are working to update and improve their properties, which make up around 15% of the total UK housing stock (4 million properties). The success of such efficiency improvements depends in part on the cooperation of tenants, and their ability and willingness to engage with the process of change. This paper describes the experiences of eleven social housing tenant households whose properties were fitted with External Wall Insulation (EWI), based on pre-and post-installation interviews and data collection. It includes discussion of tenants' knowledge, attitudes, and expectations prior to and following installation; household thermal comfort and energy spending before installation; tenant experiences of having EWI installed; tenant perceptions regarding the effects of EWI on thermal comfort, energy spending, and housing attractiveness; impacts of EWI on internal temperatures and heat loss (measured via thermal imaging); energy bill comparisons. Households experienced an average saving of 33% on energy bills following EWI installation, and the majority of tenants reported benefits including improved thermal comfort and related positive impacts on health and wellbeing. The paper concludes by highlighting potential learning points for engaging tenants in the process of enhancing energy efficiency in UK social rented housing.

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“…This fits with previous findings on EWI [22][23][24]. The difference in the amount of energy savings made by different households is of interest.…”

Section: Discussionsupporting

confidence: 91%

Section: External Wall Insulation (Ewi)mentioning

confidence: 99%

External Wall Insulation (EWI): Engaging Social Tenants in Energy Efficiency Retrofitting in the North East of England

2017

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“…They have highlighted areas where modern methods of construction can create increased costs that would not normally be encountered when using traditional methods such as loss of the factory production slot, suppliers failing to deliver the correct components or damage to critical prefabricated components. The cost of this study will be based on material costs alone similar to a study carried out by Wang et al [18], who used material costs alone to calculate the difference in price of insulated exterior walls. They have recognised that workmanship, equipment and vehicle costs will contribute to for example, a wall constructed with larger blocks.…”

Section: Costs Of Construction Methodsmentioning

confidence: 99%

Energy Efficient Construction Methods in UK Dwellings

Taki¹

2012

J Archit Eng Tech

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it. Costs are only established for improvements and expressed as a percentage increase against a base figure that is undisclosed.A recent study carried out by Energy Saving Trust [9] has focused solely on fabric improvements in the same way as this study will do; it sets out improvement measures that can be applied to masonry, timber frame and steel frame construction to improve the overall thermal transmittance, U-values. They have found that through its improvement measures an average of 25% reduction over the target emission rate for the dwelling can be made. However, they have not provided the costs for floor, roof and window improvement measures, and this information is critical for homeowners, and can be the deciding factors in the decision to embark on home improvements.Communities and Local Government [10] have analysed the potential costs of achieving all levels of the code for sustainable homes. They have investigated many ways of reducing carbon emission rather than just looking at the building fabric. Langdon [6,7] have explored many types of low and zero carbon technologies along with varying levels of building fabric upgrades to reduce carbon emissions of seven different building types. All improvement scenarios used to achieve increasing levels of carbon reductions always include improvements to the building fabric first confirming the importance of building fabric on energy performance. Their study used the dwelling base model as presented by Turner and Townsend [5] to assess the improvement measures. However, they did not include the costs of these proposed alterations to the construction methods. By concentrating on improving the fabric of existing domestic buildings the need for space heating and AbstractThis paper examines the thermal performance of housing in the UK and the associated costs for different fabric construction methods of the envelope for a typical four bedroom detached house. The energy ratings were assessed using the UK Government's Standard Assessment Procedure (SAP), which is based on the Building Research Establishment Domestic Energy Model. The capital costs were estimated from data published by the Building Cost Information Services applied to Leicester UK area in 2011. Through alterations to the dwelling fabric alone, a reduction of 30.1% in carbon emissions of the base property could be achieved. Standard methods proved to be as effective as alternative methods at reducing carbon emissions by 22.6% for an average capital cost increase of 9.1% against the base property. This was equivalent to an extra cost of £13.7 for each kg of CO 2 emissions reduction. It was found that alternative methods could reduce carbon emissions by 20.5% for an extra cost of 18.4% over the base property. The optimum construction method that would help achieve the UK government's carbon emissions target was also discussed. The paper also discusses the methods for improving energy efficiency in existing dwellings, using a typical solid-wall terraced house with a new single storey extension, as a...

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“…In recent years, studies have been conducted to evaluate the heat transfer rate and airtightness of the external insulation method applied to the Passivhaus-a voluntary standard for energy efficiency in a building that recommends annual heating and cooling demands to be less than 15 kWh/m 2 and the total specific heat load as less than 10 W/m 2 [21][22][23][24][25][26][27]. In addition, various researches have been carried out to improve the external insulation method in terms of determining the optimal insulation material thickness in order to secure the insulation performance considering the characteristics of the construction industry of various countries, their regional conditions and climatic conditions [28][29][30][31][32][33][34].…”

Section: Research Background and Purposementioning

confidence: 99%

Simulation Model for Productivity Analysis of External Insulated Precast Concrete Wall System

Baik

Kim

Lee³

et al. 2018

Sustainability

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External Insulation Finishing System (EIFS) is recognized as a suitable method for attaining energy efficiency of buildings. However, conventional EIFS is not actively applied to building construction due to additional time and cost compared with interior insulation method. Therefore, as an alternative that can contribute to active utilization of the external insulation system, this study proposes an External Insulated Precast Concrete (PC) Wall System and its simulation for performing productivity analysis. Results of this study are as follows: (1) an external insulated PC-Wall system is developed of which its insulation performance is above 40% higher than that of the conventional EIFS; (2) performance of the developed system satisfied American Standards for Testing of Materials (ASTM) and American Architectural Manufacturers Association (AAMA) standards; (3) applicability of the developed system is verified via test-bed with construction time lapsing about 40 min for each PC-Wall; and (4) CYCLONE modeling methodology is employed to perform productivity analysis of the developed system compared with conventional EIFS.

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Cost-effectiveness assessment of insulated exterior walls of residential buildings in cold climate

Cited by 62 publications

References 11 publications

External Wall Insulation (EWI): Engaging Social Tenants in Energy Efficiency Retrofitting in the North East of England

External Wall Insulation (EWI): Engaging Social Tenants in Energy Efficiency Retrofitting in the North East of England

Energy Efficient Construction Methods in UK Dwellings

Simulation Model for Productivity Analysis of External Insulated Precast Concrete Wall System

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