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Article

Sheila Conejos, Michael Yit Lin Chew and Fikril Hakim Bin Azril

Vertical greenery systems (VGS) have been a widely accepted design strategy that contributes to creating sustainable built environments. However, green building…

Abstract

Purpose

Vertical greenery systems (VGS) have been a widely accepted design strategy that contributes to creating sustainable built environments. However, green building technologies (e.g. VGS) have grown in complexity which poses maintainability challenges. Designing with maintainability in mind is crucial in delivering efficient and sustainable buildings. This paper aims to assist designers and allied professionals in terms of integrating maintainability and sustainable design in developing high-rise VGS directly from its design inception.

Design/methodology/approach

The study is grounded on the “Green Maintainability” concept which link maintainability, sustainability and facility management right at the outset. The Green Maintainability factors are translated into critical design criteria which are used to analyze the selected instrumental case studies to evaluate the high-rise VGS performance and maintainability potential. A qualitative approach via the triangulation of data collected from relevant literatures, field surveys and walkthrough interviews is undertaken.

Findings

Findings have shown that the major VGS defects which are mostly occurring in the case studies are issues concerning fallen leaves and dirt accumulation; safety issues during cleaning and repairs; insufficient maintenance access; algae/ mould growth; withering plants; water stagnation/ ponding; poor/faulty irrigation and water dripping and unavailability of natural elements. Best practices and lessons learned revealed few design oversight and technical issues concerning high-rise VGS façade implementation. While maintenance cost, biodiversity and lack of coordination among involved professionals are the additional issues which emerged during the stakeholders’ walkthrough interviews.

Originality/value

Current researches conducted on the maintainability of green building technologies (e.g. high-rise VGS) are still few. This research study is the first comprehensive assessment to determine the green maintainability potential and performance of high-rise VGS in tropical conditions.

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Article

Sheila Conejos, Michael Y.L. Chew and Esther H.K. Yung

Designing for the future sustainability and adaptability of building assets contributes to waste and emission reduction. Moreover, sustainable design and conservation…

Abstract

Purpose

Designing for the future sustainability and adaptability of building assets contributes to waste and emission reduction. Moreover, sustainable design and conservation principles are necessary for achieving sustainable and adaptable built heritage. The purpose of this paper is to introduce the improved adaptSTAR model in regards to maximising the future adaptive reuse and sustainability of existing built heritage and its surroundings.

Design/methodology/approach

A comparative study of two iconic nineteenth century heritage assets in Australia and Hong Kong is undertaken to highlight the need to forecast the future adaptation of heritage buildings in order to guarantee their continuous reuse and sustainability in an urban context.

Findings

Findings show that the functional, technological and legal attributes of these two nineteenth century heritage buildings require improvement so as to ensure their future adaptivity. The upgrading of heritage buildings for environmental sustainability is also deemed necessary.

Originality/value

The originality of this paper pertains to the advancement of the adaptSTAR tool in evaluating the future adaptivity of existing built heritage as well as new built environments whilst considering their economic, environmental and social values.

Details

International Journal of Building Pathology and Adaptation, vol. 35 no. 4
Type: Research Article
ISSN: 2398-4708

Keywords

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Article

Michael Y.L. Chew, Sheila Conejos and Jessie Sze Long Law

Nanostructured titanium dioxide (TiO2) coatings can potentially address the current surge in façade cleaning cost, maintenance and labour problems. The purpose of this…

Abstract

Purpose

Nanostructured titanium dioxide (TiO2) coatings can potentially address the current surge in façade cleaning cost, maintenance and labour problems. The purpose of this paper is to investigate potential maintainability issues and design challenges concerning the effective performance of TiO2 façade coatings’ hydrophilic properties, especially in tropical environments such as Singapore. This paper aims to establish a list of green maintainability design criteria to help minimise future TiO2 façade coating issues when this coating is applied on commercial buildings with concrete and stonemasonry façade materials.

Design/methodology/approach

A mixed-mode approach that includes a literature review, site investigation, instrumental case studies and expert interviews is used in this study.

Findings

TiO2 coatings help improve façade performance whilst offering environmental benefits to society. This study reports that green maintainability design criteria are vital requirements in designing sustainable buildings at the outset. The identified defects and issues will aid in ensuring the effectiveness of TiO2 application in building façades.

Originality/value

This study acts as a foundation for future researchers to strengthen this little researched area, serves as a useful guide in preventing possible TiO2 coating issues and promotes industry awareness of the use of TiO2 façade coatings.

Details

International Journal of Building Pathology and Adaptation, vol. 35 no. 2
Type: Research Article
ISSN: 2398-4708

Keywords

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Article

M.Y.L. Chew, Sheila Conejos and Ashan Senel Asmone

The aim of this paper is to present a research framework for the green maintainability of buildings. This study makes the case for the development of a new concept called…

Abstract

Purpose

The aim of this paper is to present a research framework for the green maintainability of buildings. This study makes the case for the development of a new concept called “green maintainability”. The paper also identifies and discusses the knowledge gap concerning green facilities management (FM). As an integral part of green FM, the economic, environmental and social impacts and opportunities of green maintainability throughout the total life cycle of the facility are also highlighted.

Design/methodology/approach

The little attention paid to the maintainability of green buildings has resulted in losses of lives due to occupational health and safety hazards as well as high operation and maintenance costs. To address this issue, this study has conducted a literature review to determine the relevant background knowledge and provides a conceptual framework that will aid in conceptualizing the green maintainability of buildings and the development of a research framework for the furtherance of this concept.

Findings

This paper finds that there is little research on the maintainability of green buildings, and the studies about the maintainability of green features are nonexistent in current research. This study confirms the knowledge gap of this little-researched area and draws from it the formulation of a research framework for the green maintainability of buildings to ensure green FM. Emerging literature on green practices and methods is currently receiving attention from academia, as well as building and construction practitioners, and can valuably contribute to the existing theories, practices and methods concerning building maintainability and facilities management.

Originality/value

This study develops the novel concept of green maintainability, which integrates maintainability and green FM at the planning/design stage. The proposed research framework is the first attempt to investigate the green maintainability of different typologies of buildings and especially green building technologies.

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Article

Michael Y.L. Chew and Sheila Conejos

The use of green wall technology in green buildings is a growing trend; however, more research is required about their maintainability, taking into account that…

Abstract

Purpose

The use of green wall technology in green buildings is a growing trend; however, more research is required about their maintainability, taking into account that maintainability at the design stage is a valuable strategy in achieving building efficiency and sustainability. Thus, the purpose of this paper is to determine the issues in operating and maintaining green walls, particularly in tropical areas like Singapore, leading to the development of a green maintainability framework.

Design/methodology/approach

This research uses a qualitative method that combines a thorough and systematic literature review, multiple case studies, field observation surveys and selected instrumental case studies with building plan appraisal and interviews to investigate the potential issues associated with the maintainability of green walls in tropical areas like Singapore.

Findings

The findings show that technical and environmental issues/defects are prevalent in the operation and maintainability of green wall technologies applied in green buildings located in tropical regions. Proper considerations of these findings will encourage green building designers and facilities managers to collaborate in the effective implementation of operations and maintenance of green building technologies.

Originality/value

This research gives new and significant information while identifying a clear knowledge gap. The paper recommends the formulation of a green maintainability framework with a set of design criteria that will serve as a benchmark in the future design of green walls. The green maintainability framework would be a valuable addition to green facilities management in ensuring the long-term maintainability and sustainability of existing and new green walls in tropical areas specifically in Singapore.

Details

Structural Survey, vol. 34 no. 4/5
Type: Research Article
ISSN: 0263-080X

Keywords

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Article

Sheila Conejos, Aristotle Ubando and Michael Yit Lin Chew

The self-cleaning properties of nanostructured titanium dioxide facade coatings are useful in Singapore's tropical climate. However, its potential maintenance issues need…

Abstract

Purpose

The self-cleaning properties of nanostructured titanium dioxide facade coatings are useful in Singapore's tropical climate. However, its potential maintenance issues need to be determined right at the design stage. The purpose of this paper is to highlight the development of the design for maintainability tool which is a multicriteria design decision score sheet that evaluates the maintainability potential of nano-facade coating applications on high-rise façades with concrete and stonemasonry finishes and curtain walls.

Design/methodology/approach

Quantitative methods (expert and practitioner surveys) are conducted in this research study. Analytic hierarchy process (AHP) and sensitivity analysis were used to develop a robust Design for Maintainability tool.

Findings

Safety measures indicator received the highest weighted score by experts, while the maximizing performance, minimizing risk, minimizing negative environmental impact and minimizing consumption of matter and energy were the top ranking main criteria by both experts and practitioners. The top ranked design for maintainability sub-criteria identified by practitioners and experts were risk management, maintenance considerations, climatic conditions, safety measures, lifecycle cost and maintenance access, sun's path, rainfall intensity, biological growth measures and building age profile.

Originality/value

Most researches on the maintainability of nano-façade coatings uses experimentation to test the durability of nano-façade coatings, while this study focuses on design based empirical data such as establishing and ranking the list of design for maintainability criteria or indicators to minimize future defects and maintenance issues. The design for maintainability tool contributes to the maintainability of nano-façade coatings leading to maximizing its performance while minimizing cost, risks, resource consumption and negative environmental impact.

Details

Built Environment Project and Asset Management, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2044-124X

Keywords

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Article

Sheila Conejos, Craig Langston and Jim Smith

This paper aims to make the case for the development of an adaptive reuse rating tool targeted to new building design that maximises the embedded adaptive reuse potential…

Abstract

Purpose

This paper aims to make the case for the development of an adaptive reuse rating tool targeted to new building design that maximises the embedded adaptive reuse potential of these buildings later in their life, thereby adding to built environment sustainability.

Design/methodology/approach

This exploratory study retrospectively analyses successful adaptive reuse projects to establish and test a multi-criteria decision-making model for new design projects. This paper contains a report on the final stages of the research methodology (quantitative approach) used in the development of the adaptSTAR model that critically assesses the list of design criteria identified in the first stage of the study. Improvements to the case studies that would have further enhanced their reuse potential later in life are proposed. The results are compared to an established decision tool (adaptive reuse potential [ARP] model) to determine their level of consistency.

Findings

The findings of this research show that design criteria can be identified and weighted according to seven categories to calculate a building’s adaptive reuse star rating. Both the adaptSTAR and ARP models exhibit a strong relationship and are positively correlated.

Originality/value

The research demonstrates that by applying adaptSTAR to new designs, it will contribute to greater sustainability for the built environment in the long term via reducing the rate of building obsolescence.

Details

Facilities, vol. 33 no. 9/10
Type: Research Article
ISSN: 0263-2772

Keywords

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