EFFECT OF BUILDING MATERIALS COST ON HOUSING DELIVERY TOWARDS SUSTAINABILITY

•             TABLE OF CONTENTS DECLARATION ................................................................................................................................ ii ABSTRACT...................................................................................................................................... iii ACKNOWLEDGEMENTS.................................................................................................................. v TABLE OF CONTENTS.................................................................................................................. vii LIST OF FIGURES............................................................................................................................. x LIST OF TABLES............................................................................................................................. xi DEFINITION OF TERMS................................................................................................................. xii ABBREVIATIONS AND MEANING............................................................................................... xiii ARTICLES FOR PUBLICATION......................................................................................................xiv 

Chapter ONE

INTRODUCTION

• ................................................................................................................................1 
• 1.1INTRODUCTION.........................................................................................................................1 
• 1.2BACKGROUND TO THE STUDY.................................................................................................2 
• 1.3Problem statement.....................................................................................................................4 
• 1.4AIM AND OBJECTIVES OF THE RESEARCH...........................................................................4 1.
• 4.1Aim............................................................................................................................................4 1.
• 4.2Objectives..................................................................................................................................5 The objectives of this research are as follows: ..................................................................................5 
• 1.5Research questions.....................................................................................................................5 
• 1.6Significance of the study ..............................................................................................................5 
• 1.7Research methodology and design.............................................................................................6 1.
• 7.1Research design ....................................................................................................................6 1.
• 7.2Population of the study............................................................................................................7 1.
• 7.3Instrument for data collection ................................................................................................7 1.
• 7.4Administration of instrument ................................................................................................8 1.
• 7.5Techniques of data analysis.................................................................................................8 1.
• 7.6Scope and limitation of the study ........................................................................................8 
• 1.8Key assumptions ....................................................................................................................8 
• 1.9Ethical considerations.............................................................................................................9 
• 1.10Thesis structure.......................................................................................................................9 
• 1.11Research process ....................................................................................................................9 
• 1.12Chapter summary......................................................................................................................10 
• 2.0LITERATURE REVIEW...............................................................................................................11 
• 2.1Introduction ...............................................................................................................................11 
• 2.2Construction industry .................................................................................................................11 2.
• 2.1Construction stakeholders.......................................................................................................13 
• 2.3Sustainable development and sustainable housing ...................................................................14 
• 2.4Building materials ...............................................................................................................16 2.
• 4.1Factors responsible for increase in the cost of building materials......................................17 2.4.
• 1.2Building production related factors..................................................................................19 2.4.
• 1.3Stakeholder related factors ..............................................................................................21 2.4.
• 1.4External factors.................................................................................................................22 
• 2.5Construction project consideration ............................................................................................23 2.
• 5.1Cost consideration ...............................................................................................................24 2.
• 5.2Quality consideration...........................................................................................................25 2.
• 5.3Time consideration ..............................................................................................................26 2.
• 5.4Human management ...........................................................................................................27 
• 2.6Material management ................................................................................................................28 2.
• 6.1Materials utilisation and wastage........................................................................................30 2.
• 6.2Waste management.............................................................................................................31 2.
• 6.3Cost overrun in construction project...................................................................................32 2.
• 6.4Time overrun in construction project..................................................................................33 
• 2.7EFFECTS OF BUILDING MATERIALS COST ON HOUSING DELIVERY ...............................35 2.
• 7.1Fluctuation in cost of construction ......................................................................................35 2.
• 7.2Increase in project abandonment........................................................................................36 2.
• 7.3Low volume of construction product...................................................................................36 2.
• 7.4Poor quality of workmanship...............................................................................................37 2.
• 7.5Unemployment of construction workers.............................................................................37 
• 2.8Selection of sustainable building materials.............................................................................38 
• 2.
• 8.1Principles of material selection towards sustainable construction ....................................39 2.
• 8.2Criteria for selection of sustainable building materials.......................................................41 2.8.
• 2.1Resource efficiency ...........................................................................................................42 2.8.
• 2.2Energy efficiency ...............................................................................................................42 2.8.
• 2.3Indoor Air Quality (IAQ) ....................................................................................................43 
• 2.9Chapter summary....................................................................................................................44 

Chapter THREE

RESEARCH METHODOLOGY

• ...........................................................................................................................45 RESEARCH METHODOLOGY AND DESIGN................................................................................
• 453.1INTRODUCTION........................................................................................................................45 
• 3.2Research philosophies .........................................................................................................45 
• 3.3Research methodology ............................................................................................................47 
• 3.4Research approach...................................................................................................................51 
• 3.5Research strategies...................................................................................................................52 
• 3.6Questionnaire development.......................................................................................................54 
• 3.7Research design ........................................................................................................................
• 563.8Validity and reliability of the data................................................................................................62 
• 3.9Chapter summary........................................................................................................................63 

Chapter FOUR

DATA PRESENTATION AND ANALYSIS

• ............................................................................................................................65 
• 4.1Introduction ................................................................................................................................65 
• 4.2Exploratory study .....................................................................................................................65 
• 4.3Questionnaire survey for the main study ..............................................................................65 
• 4.5Testing the reliability of the research Instrument.......................................................................71 
• 4.6Presentation of findings..............................................................................................................71 
• 4.7Discussion of the findings .........................................................................................................81 
• 4.8Validity assurance of the quantitative research results ............................................................89 
• 4.9Validation of findings.................................................................................................................90 
• 4.10Achieving the objectives of the research study...................................................................96 
• 4.11Operational framework .......................................................................................................99 
• 4.12Chapter summary..................................................................................................................100 

Chapter FIVE

SUMMARY, CONCLUSION AND RECOMMENDATIONS

• ...........................................................................................................................102 SUMMARY, CONCLUSIONS AND RECOMMENDATIONS .........................................................102 
• 5.1Introduction .........................................................................................................................102 
• 5.2Summary ..............................................................................................................................102 
• 5.3Conclusion................................................................................................................................103 
• 5.4Limitations..............................................................................................................................104 
• 5.5Conclusion and recommendations.........................................................................................105 
• 5.6Areas for further study..........................................................................................................107 REFERENCES............................................................................................................................108 APPENDICES: APPENDIX A – SURVEY QUESTIONAIRE..........................................................134 APPENDIX B: INTERVIEW QUESTIONS.....................................................................................144