1. Department of Quantity Surveying and Real Estate, Faculty of Engineering and Built Environment; Tunku Abdul Rahman University College; Jalan Genting Kelang, Setapak Kuala Lumpur 53300 Malaysia
2. Department of Environmental, Faculty of Civil Engineering; Universiti Teknologi Malaysia; 81310, UTM, Skudai Johor Malaysia
3. Department of Polymer Engineering, Faculty of Chemical Engineering; Universiti Teknologi Malaysia; 81310 UTM Skudai Johor Malaysia