EFFECT OF BUILDING MATERIALS COST ON HOUSING DELIVERY TOWARDS SUSTAINABILITY
Table Of Contents
- <p> <b>TABLE OF CONTENTS </b></p><p>DECLARATION ................................................................................................................................ ii</p><p> ABSTRACT...................................................................................................................................... iii </p><p>ACKNOWLEDGEMENTS.................................................................................................................. v </p><p>TABLE OF CONTENTS.................................................................................................................. vii </p><p>LIST OF FIGURES............................................................................................................................. x</p><p> LIST OF TABLES............................................................................................................................. xi</p><p> DEFINITION OF TERMS................................................................................................................. xii</p><p> ABBREVIATIONS AND MEANING............................................................................................... xiii </p><p>ARTICLES FOR PUBLICATION......................................................................................................xiv </p><p>
Chapter ONE
INTRODUCTION
- ................................................................................................................................1</p><p>
- 1.1INTRODUCTION.........................................................................................................................1 </p><p>
- 1.2BACKGROUND TO THE STUDY.................................................................................................2</p><p>
- 1.3Problem statement.....................................................................................................................4 </p><p>
- 1.4AIM AND OBJECTIVES OF THE RESEARCH...........................................................................4 </p><p>1.
- 4.1Aim............................................................................................................................................4 </p><p>1.
- 4.2Objectives..................................................................................................................................5 </p><p>The objectives of this research are as follows: ..................................................................................5</p><p>
- 1.5Research questions.....................................................................................................................5 </p><p>
- 1.6Significance of the study ..............................................................................................................5 </p><p>
- 1.7Research methodology and design.............................................................................................6 </p><p>1.
- 7.1Research design ....................................................................................................................6 </p><p>1.
- 7.2Population of the study............................................................................................................7 </p><p>1.
- 7.3Instrument for data collection ................................................................................................7 </p><p>1.
- 7.4Administration of instrument ................................................................................................8 </p><p>1.
- 7.5Techniques of data analysis.................................................................................................8 </p><p>1.
- 7.6Scope and limitation of the study ........................................................................................8 </p><p>
- 1.8Key assumptions ....................................................................................................................8 </p><p>
- 1.9Ethical considerations.............................................................................................................9 </p><p>
- 1.10Thesis structure.......................................................................................................................9 </p><p>
- 1.11Research process ....................................................................................................................9</p><p>
- 1.12Chapter summary......................................................................................................................10</p><p>
- 2.0LITERATURE REVIEW...............................................................................................................11</p><p>
- 2.1Introduction ...............................................................................................................................11 </p><p>
- 2.2Construction industry .................................................................................................................11 </p><p>2.
- 2.1Construction stakeholders.......................................................................................................13</p><p>
- 2.3Sustainable development and sustainable housing ...................................................................14</p><p>
- 2.4Building materials ...............................................................................................................16 </p><p>2.
- 4.1Factors responsible for increase in the cost of building materials......................................17</p><p> 2.4.
- 1.2Building production related factors..................................................................................19 </p><p>2.4.
- 1.3Stakeholder related factors ..............................................................................................21 </p><p>2.4.
- 1.4External factors.................................................................................................................22 </p><p>
- 2.5Construction project consideration ............................................................................................23</p><p> 2.
- 5.1Cost consideration ...............................................................................................................24</p><p> 2.
- 5.2Quality consideration...........................................................................................................25 </p><p>2.
- 5.3Time consideration ..............................................................................................................26 </p><p>2.
- 5.4Human management ...........................................................................................................27 </p><p>
- 2.6Material management ................................................................................................................28</p><p> 2.
- 6.1Materials utilisation and wastage........................................................................................30 </p><p>2.
- 6.2Waste management.............................................................................................................31 </p><p>2.
- 6.3Cost overrun in construction project...................................................................................32 </p><p>2.
- 6.4Time overrun in construction project..................................................................................33 </p><p>
- 2.7EFFECTS OF BUILDING MATERIALS COST ON HOUSING DELIVERY ...............................35</p><p> 2.
- 7.1Fluctuation in cost of construction ......................................................................................35</p><p> 2.
- 7.2Increase in project abandonment........................................................................................36</p><p> 2.
- 7.3Low volume of construction product...................................................................................36 </p><p>2.
- 7.4Poor quality of workmanship...............................................................................................37 </p><p>2.
- 7.5Unemployment of construction workers.............................................................................37 </p><p>
- 2.8Selection of sustainable building materials.............................................................................38</p><p>
- 2.
- 8.1Principles of material selection towards sustainable construction ....................................39 </p><p>2.
- 8.2Criteria for selection of sustainable building materials.......................................................41 </p><p>2.8.
- 2.1Resource efficiency ...........................................................................................................42</p><p> 2.8.
- 2.2Energy efficiency ...............................................................................................................42 </p><p>2.8.
- 2.3Indoor Air Quality (IAQ) ....................................................................................................43 </p><p>
- 2.9Chapter summary....................................................................................................................44 </p><p>
Chapter THREE
RESEARCH METHODOLOGY
- ...........................................................................................................................45 </p><p>RESEARCH METHODOLOGY AND DESIGN................................................................................45</p><p>
- 3.1INTRODUCTION........................................................................................................................45</p><p>
- 3.2Research philosophies .........................................................................................................45 </p><p>
- 3.3Research methodology ............................................................................................................47 </p><p>
- 3.4Research approach...................................................................................................................51 </p><p>
- 3.5Research strategies...................................................................................................................52 </p><p>
- 3.6Questionnaire development.......................................................................................................54 </p><p>
- 3.7Research design ........................................................................................................................56</p><p>
- 3.8Validity and reliability of the data................................................................................................62 </p><p>
- 3.9Chapter summary........................................................................................................................63 </p><p>
Chapter FOUR
DATA PRESENTATION AND ANALYSIS
- ............................................................................................................................65 </p><p>
- 4.1Introduction ................................................................................................................................65 </p><p>
- 4.2Exploratory study .....................................................................................................................65</p><p>
- 4.3Questionnaire survey for the main study ..............................................................................65 </p><p>
- 4.5Testing the reliability of the research Instrument.......................................................................71 </p><p>
- 4.6Presentation of findings..............................................................................................................71 </p><p>
- 4.7Discussion of the findings .........................................................................................................81 </p><p>
- 4.8Validity assurance of the quantitative research results ............................................................89 </p><p>
- 4.9Validation of findings.................................................................................................................90 </p><p>
- 4.10Achieving the objectives of the research study...................................................................96</p><p>
- 4.11Operational framework .......................................................................................................99 </p><p>
- 4.12Chapter summary..................................................................................................................100 </p><p>
Chapter FIVE
SUMMARY, CONCLUSION AND RECOMMENDATIONS
- ...........................................................................................................................102 </p><p>SUMMARY, CONCLUSIONS AND RECOMMENDATIONS .........................................................102 </p><p>
- 5.1Introduction .........................................................................................................................102 </p><p>
- 5.2Summary ..............................................................................................................................102 </p><p>
- 5.3Conclusion................................................................................................................................103</p><p>
- 5.4Limitations..............................................................................................................................104 </p><p>
- 5.5Conclusion and recommendations.........................................................................................105 </p><p>
- 5.6Areas for further study..........................................................................................................107</p><p> REFERENCES............................................................................................................................108 </p><p>APPENDICES: APPENDIX A – SURVEY QUESTIONAIRE..........................................................134 </p><p>APPENDIX B: INTERVIEW QUESTIONS.....................................................................................144 </p>
Project Abstract
<p> <b>ABSTRACT </b></p><p>The study investigates the predominant factors responsible for increase in the cost of building materials and the effect of this cost increase on housing delivery in Western Cape, South Africa. Sustainable housing is buildings produced to meet the present housing needs of people without conceding the ability of the future generation to meet their future needs. However, a significant increase in the cost of building materials has been a major constraint to the delivery of sustainable housings, as made evident in the literature, leading to project cost and time overruns or even project abandonment. However, building materials consume up to 65% of the total cost of construction. This factor on cost has, over the years, threatened the ability of the construction industry to deliver projects within budgeted cost, at stipulated time, and at satisfactory quality. This prompted the need to proffer solutions to these factors identified which are causing increases in the cost of building materials towards sustainable housing delivery in Western Cape. Based on this research study, housing is termed to be sustainable when it is available and affordable for the masses timely and at quality expected. The research study adopted a mixed methodological approach, involving the use of semistructured qualitative interviews and closed-ended quantitative questionnaires administered to construction stakeholders (architects, quantity surveyors, engineers, construction managers, project managers, site supervisors and material suppliers) in the Western Cape Province of South Africa. SPSS version 24 software was used for analysing the quantitative data collected and ‘content analysis’ method was used to analyse the information collected through the qualitative interviews. The findings revealed that the major factors responsible for increasing the cost of building materials are inflation, wastages of building materials by labourers, cost of transportation and distribution of labour, design changes, client contribution to design change and change in government policies and regulation. Moreover, the research showed that fluctuation in the cost of construction and high maintenance costs due to poor workmanship also impact the cost increase of building materials for housing delivery. In addition, research findings affirmed that for optimum materials usage for the enhancement of sustainable construction, the following criteria should be considered in the selection of building materials maintenance cost, energy consumption and maintainability. The adoption of these findings by construction stakeholders in the South African construction industry would enhance the delivery of affordable housing at reduced cost, at the required time and at the expected quality. Therefore, an adequate implementation of the framework presented in this study will enhance sustainable housing delivery. </p><p><b><i>Keywords Building materials, housing, housing delivery, material cost, stakeholders, sustainability and sustainable housing. </i></b> <br></p>
Project Overview