This research study determined the maximum profit of the installation and application of waterproofing membrane using a linear programming model with the Microsoft Excel Solver aid.  Setting the decision variables, objective function, and constraints on the real-life construction projects, some essential decision-making pointers were collected after getting the optimal result.  This case is set in a month-long availability of the areas for installation and application of waterproofing system.  Each activity's production rates are taken from previous and on-going projects in a different location in the State of Qatar.  The construction projects are located in the municipalities and cities of Lusail, Doha, Rayyan, Al Khor, Umm Salal, Al Wakrah, Al Daayen, Al Shamal, and Al Sheehaniya.  The waterproofing system consists of PVC (Polyvinyl Chloride) T-Lock, Bituminous membrane, cold-spray membrane, and cementitious membrane.

Keywords
Linear Programming Model, Maximization, Simplex Method, Waterproofing.